Nuclear fusion reactions begin in the main sequence stage of a star's life.
During the main sequence stage, a star is in hydrostatic equilibrium, meaning that the outward pressure of the hot, dense gas at its core is balanced by the inward gravitational force. This balance allows the star to maintain a stable size and luminosity.
At the core of a main sequence star, the temperature and pressure are high enough to initiate nuclear fusion reactions, in which hydrogen nuclei combine to form heavier helium nuclei. These reactions release a large amount of energy in the form of light and heat, which helps to maintain the high temperature and pressure at the core and keep the star in hydrostatic equilibrium.
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what is the volume of 19.6 g of a liquid that has a density of 0.967 g/ml?
The volume of the liquid is 20.26ml.
Volume is a measurement of three-dimensional space that is occupied. Numerous imperial or US customary units, as well as SI-derived units (such the cubic metre and liter), are frequently used to quantify it numerically (such as the gallon, quart, cubic inch).
We are given that,
Mass = m = 19.6g
Density = d = 0.967 g/ml
To calculate the volume of the liquid can be given as,
density = mass/volume
V = m/d
V = (19.6g)/(0.967g/ml)
V = 20.26ml
Therefore , the volume of the liquid is 20.26ml.
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A rocket, initially at rest on the ground, accelerates straight upward from rest with constant (net) acceleration 58.8 m/s^2 . The acceleration period lasts for time 6.00 s until the fuel is exhausted. After that, the rocket is in free fall.
Find the maximum height ymax reached by the rocket. Ignore air resistance and assume a constant free-fall acceleration equal to 9.80 m/s^2 .
Answer:
Approximately [tex]7.41 \times 10^{3}\; {\rm m}[/tex].
Explanation:
If initial velocity, final velocity, and time taken are all found, then the change in height (displacement) can be found as:
[tex]\begin{aligned}(\text{displacement}) &= \frac{(\text{average velocity})}{(\text{time taken})} \\ &= \frac{(1/2)[(\text{initial velocity}) + (\text{final velocity})]}{(\text{time taken})}\end{aligned}[/tex].
For example, during the [tex]t = 6.00\; {\rm s}[/tex] of constant acceleration at [tex]a = 58.8\; {\rm m\cdot s^{-2}}[/tex], initial velocity was [tex]u = 0\; {\rm m\cdot s^{-1}}[/tex] and final velocity would be:
[tex]\begin{aligned}v &= (\text{initial velocity}) + (\text{acceleration}) \, (\text{time}) \\ &= (0\; {\rm m\cdot s^{-1}}) + (58.8\; {\rm m\cdot s^{-2}})\, (6.00\; {\rm s}) \\ &= 352.8\; {\rm m\cdot s^{-1}}\end{aligned}[/tex].
Displacement during this period of time would be:
[tex]\begin{aligned}(\text{displacement}) &= \frac{(\text{average velocity})}{(\text{time taken})} \\ &= \frac{(1/2)[(\text{initial velocity}) + (\text{final velocity})]}{(\text{time taken})} \\ &= \frac{(1/2)\, (0\; {\rm m\cdot s^{-1}} + 352.8\; {\rm m\cdot s^{-1}})}{(6.00\; {\rm m\cdot s^{-1}})} \\ &\approx 1.058\times 10^{3}\; {\rm m}\end{aligned}[/tex].
During the next part of the flight, initial velocity was [tex]352.8\; {\rm m\cdot s^{-1}}[/tex] (from the first part of flight) and final velocity would be [tex]0\; {\rm m\cdot s^{-1}}[/tex] when the rocket reaches maximum height. Acceleration was given to be [tex]a = (-9.80\; {\rm m\cdot s^{-2}})[/tex](negative since the rocket is accelerating downward,) but time is not known. Apply the following equation to find the change in height (displacement):
[tex]\begin{aligned}(\text{displacement}) &= \frac{[(\text{final velocity})^{2} - (\text{initial velocity})^{2}]}{2\, (\text{acceleration})} \\ &\approx \frac{(0\; {\rm m\cdot s^{-1}})^{2} - (352.8\; {\rm m\cdot s^{-1}})^{2}}{2\, (-9.80\; {\rm m\cdot s^{-2}})} \\ &\approx 6.350\times 10^{3}\; {\rm m}\end{aligned}[/tex].
The total change in height would be approximately [tex](1.058\times 10^{3}\; {\rm m}) + (6.350\times 10^{3}\; {\rm m}) \approx 7.41\times 10^{3}\; {\rm m}[/tex].
FILL IN THE BLANK. the format specifier ________ is used to output values of type float or double.
The format specifier %f is used to output values of type float or double.
Format specifiers are used in C to accept inputs and print out the output of a type. The sign% is present in every format specifier we use. The type of data that must be submitted as input and the type of data that must be displayed on the screen are both specified by format specifiers to the compiler.
Both the input and the output use the format specifier. When a variable is taking input with scanf() or printing data with printf, there is a technique to let the compiler know what type of data is there in the variable (). Examples are %c, %d, and %f.
Format specifiers in C typically come in six different flavors.
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g solid wooden sphere of volume 0.0100 m3 floats freely exactly one-half submerged in a liquid of density 800 kg/m3. a lightweight cord is now tied to the sphere and is used to pull the sphere under the surface and hold it completely submerged. what is the tension in the cord?
The cord has a one percent tension. When something or someone pulls on a cord or string, the tension that results is what is being described.
We are aware that T = mg + ma is the formula used to compute the force of tension.
Calculation:T = mg + ma
T = 800 × 9.8 + 800 ×9.8
How much tension is there?Tension is the force that is sent through a rope, string, or wire when two opposing forces pull on it. Along the whole length of the wire, the tension force pulls energy equally on the bodies at the ends. Every physical object that comes into contact with another one exerts force on it.
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What percent remains after 2 half-lives?
25 % This table shows that the amount of reactant remaining following n first-order reaction half-lives is (1/2)n times the initial concentration.
How much of a radioisotope sample is still present after two half-lives?As a result, 50% of the original parent nuclei are still present after one half-life, 25% after two half-lives, etc. The half-life and the initial quantity of radioactive atoms present both affect how much radiation is produced by a radioactive source.
After two half-lives, what is the daughter parent ratio?Therefore, after two half-lives, the parent-to-daughter atom ratio is 1:3. (one-quarter to three-quarters). The original parent is reduced to an eighth, a sixteenth, a thirty-second, and so on via successive half-lives.
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Objects a and b each have a mass of 25 kilograms. object a has a velocity of 5.98 meters/second. object b is stationary. they undergo a perfectly elastic collision in one dimension. what is the total kinetic energy of the system after the collision?
a. 1.2 × 102 joules
b. 4.5 × 102 joules
c. 5.0 × 102 joules
d. 9.5 × 102 joules
e. 1.1 × 103 joules
The total kinetic energy of the system after the collision will be 4.5 ×10^2 Joules
Option (B) is the correct choice.
An elastic collision is one in which the system does not experience a net loss of kinetic energy as a result of the collision.
In elastic collisions, momentum and kinetic energy are both preserved.
Imagine two trolleys that resemble one another moving in the same direction at the same pace. They clash, maintaining their speed as they bounce off one another. The fact that no energy has been wasted makes this collision fully elastic.
Therefore, to calculate the kinetic energy of the system after the collision
We will use the formula 1/2 mv²
Mass = 25 kg
Velocity = 5.98 m/s
So, the value of KE = 1/2 × 25 × 5.98 ² = 447 Joules = 4.5 ×10^2 Joules (Approximately)
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The wave oscillation period is 0.5 minutes. Find the length of this wave if its speed is 54 km/h
To find the length of the wave if its speed is 54 km/h, we can use the formula:
Wavelength = Speed / Frequency
where the frequency of the wave is equal to the inverse of the oscillation period. The oscillation period of the wave is 0.5 minutes, so the frequency is 1 / (0.5 minutes) = 2 oscillations/minute.
We can now plug these values into the formula to find the wavelength:
Wavelength = 54 km/h / (2 oscillations/minute)
= 27 km
Therefore, the length of the wave is 27 km
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A person lifted a bag of groceries 1.75 m from the floor onto a countertop using a constant force of 57 newtons. if the force was applied for 6.0 seconds, how much power was generated by the individual, to the nearest tenth of a watt?
The person generated approximately 16.7 W of power while lifting the bag of groceries. To the nearest tenth of a watt, this would be 16.7 W.
To calculate the power generated by the person lifting the bag of groceries, you can use the equation:
Power = Work / Time
where Power is the power generated, Work is the work done, and Time is the time over which the work was done.
In this case, the work done is equal to the force applied (57 N) multiplied by the distance over which the force was applied (1.75 m), or 57 N * 1.75 m = 100.25 J. The time over which the work was done is 6.0 seconds.
Plugging these values into the equation above, we get:
Power = 100.25 J / 6.0 s
This simplifies to:
Power = 16.7 W
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What are the 6 elements of safety?
The five pillars of safety are engineering, encouragement, enforcement, and evaluation. Your strategy to ensure that you promote a safe environment and workplace should heavily emphasize education.
What are the safety three Cs?By exercising your intellect beforehand, you may be able to save a life or at least lessen someone else's suffering. The three fundamental Cs are check, call, and care.
What number of safety components are there?
A Framework for Aligning the 14 Process Safety Management Elements. To prevent the release of extremely hazardous substances, it is essential to use related techniques to managing hazards, although it might be difficult to put Process Safety Management's operational goals into effect.
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study smarter a charged capacitor and an inductor are connected in series at time t 0. in terms of the period t of the resulting oscillations, determine how much later the following reach their maximum value: (a) the charge on the capacitor; (b) the voltage across the capacitor, with its original polarity; (c) the energy stored in the electric field; and (d) the current.
Alternate Approach The inductor exhibits open circuit behavior at time t=0+. At t=0+, inductive reactance is infinite, causing the inductor to initially operate as an open circuit. The inductor similarly acts like a short circuit at steady state.
At time t 0, what is an inductor?The inductor behaves as an open circuit with current reflected back at time t = 0 +. Important Information: A capacitor with a zero starting condition behaves as a short circuit at time t = 0 +, reflecting back voltage.
when an inductor and a charged capacitor are coupled?At time t = 0, an inductor is coupled to a charged capacitor. Considering the capacitor and the inductor as one, Write out the equation for the effective potential difference across the combination at any instant in time t, and then solve it to find the instantaneous current through the combination.
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how many neutrinos per second should be incident on every square meter of the earth from this process? this huge number is indicative of how rarely a neutrino interacts, since large detectors observe very few per day.
The area is 4 times 1.496 times 10 to 11 meters squared, and when we divide this by the total amount of neutrinos created during the proton-proton cycle each second, we obtain 6 times 10 to 14 neutrinos per square meter every second on Earth.
At the distance from the earth, how many neutrinos flow through each square meter of a sphere's surface?Neutrinos carry away around 3% of the energy produced by nuclear fusion in the Sun. Scientists estimate about 35 million billion (3.5 1016) solar neutrinos pass through each square meter of the Earth's surface per second as a result of protons reacting and creating neutrinos inside the Sun's core.
Your thumbnail receives how many neutrinos each second?Your thumbnail receives about 100 billion solar neutrinos each second. Nuclear fusion occurs in the sun, where it results in the creation of neutrinos.
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The ________ element in the definition of motivation is a measure of intensity, drive, and vigor.
A) persistence
B) conformance
C) energy
D) direction
The energy element in the definition of motivation is considered a measure of intensity, drive, and vigor.
Motivation is the process by which a person puts in energized, directed, and sustained effort to attain a defined goal. The energy element is taken as the measure of intensity or drive.
The term "motivation" describes the reason behind action. It is the driving force guiding human actions. Motivation is the process of initiating, guiding, and maintaining goal-oriented behaviors of a person or an organization.
There are three major components that drive motivation: activation, persistence, and intensity.
Energy element measures intensity or drive.
Direction is when the effort is directed toward and consistent with organizational goals.
Persistence is putting continue and sustained effort to achieve goals.
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Is waste Scope 1 or Scope 3?
Due to the fact that the reporting company purchases waste management services, treatment of waste produced during operations is designated as an originating scope 3 category.
What falls under Scope 3?Scope 3 emission are the outcome of operations on resources that the reporting company does not own or control, but which are indirectly impacted by the organization through its value chain.All sources outside of an organization's range 1 and scope 2 boundary are included in scope 3 emissions.
What targets are in scope 3?Scope 3 emissions were indirect emission of greenhouse gases that are produced in the larger economy in addition to scope 2 emissions.They result from a facility's operations but come from sources not under the ownership or control of that facility.
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1. Two projectiles are thrown from the same point with the same velocity of 50 ms‐¹. The first is projected Making at an angle of θ with the horizontal and the second with an angular of (90-θ)⁰. if the second is found to rise 25m higher than the first.
A. calculate the highest to which each will rise .
B. calculate and compare their range .
C. which one reaches the ground first
The highest to which the first projectile rises will be equal to 51.25 m and the second projectile is 76.29 m.
What is Projectile Motion?A projectile can be defined as an object that will be thrown obliquely near the surface, it follows along a curved path with constant acceleration.
In a Projectile Motion, along the y-axis, there is a constant acceleration, responsible for the vertical motion of the particle while along the x-axis plotted is uniform velocity, responsible for the horizontal motion.
The maximum height of the first projectile is given by:
[tex]\displaystyle Y_1 = \frac{u^2sin^2\theta}{2g}[/tex]
The maximum height of the second projectile is given by:
[tex]\displaystyle Y_2 = \frac{u^2sin^2(90-\theta)}{2g}[/tex]
[tex]\displaystyle Y_2 = \frac{u^2cos^2\theta}{2g}[/tex]
[tex]\displaystyle Y_2 -Y_1 = \frac{u^2(cos^2-sin^2\theta)}{2g}[/tex]
[tex]\displaystyle Y_2 -Y_1= \frac{u^2cos2\theta}{2g}[/tex]
Given, height difference Y₂ - Y₁ = 25 m, initial velocity, u = 50m/s
[tex]\displaystyle 25 = \frac{(50)^2cos2\theta}{2\times 9.8}[/tex]
cos 2θ = 0.196
θ = 39.34°
[tex]\displaystyle Y_1 = \frac{(50)^2sin^2 (39.34)}{2\times 9.8}[/tex]
Y₁ = 51.25 m
[tex]\displaystyle Y_2 = \frac{(50)^2sin^2 (50.66)}{2\times 9.8}[/tex]
Y₂ = 76.29 m
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A 10-kg block on a rough horizontal surface is attached to a light spring (force constant = 1. 4 kn/m). The block is pulled 8. 0 cm to the right from its equilibrium position and released from rest. The frictional force between the block and surface has a magnitude of 30 n. What is the kinetic energy of the block as it passes through its equilibrium position?.
To develop this problem it is necessary to apply the concepts related to the conservation of Energy. In this case the definition concerning kinetic energy from the simple harmonic movement.
Where,
KE = PE8 + Wf
KE = 1/2KA² + Wf
KE = Kinetic Energy
PE8 = Potential Harmonic Simple Energy
Wf = Work made by friction.
Our values are given as,
m = 10Kg ⇒ mass
k = 1400N/m ⇒ Spring constant
A = 0.1m ⇒Amplitude
f = 30N Frictional Force
Replacing we have,
KE = 1/2 ka² +Wf
KE = 1/2(1400)×(0.8)²+(-30×0.8)
KE = 4245
Therefore the Kinetic Energy of the block as it passes through its equlibrium position is 4245J.
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a jeweler's eyepiece generates magnifications of 20x. what is the size of the image of a 0.5mm gem?
The magnification produced by the lens of a 0.5 mm gem is 10mm.
The magnification of a lens is calculated in terms of the ratio of image height to object height. It is also expressed as a ration of image distance and object distance.
Magnification of lens = image height / object height = image distance / object distance.
M = [tex]h^{'[/tex]/ h = v/u
Magnification of concave lens is negative and of convex lens is positive.
In the given question,
M = 20
h = 0.5 mm
We have to find size of image, [tex]h^{'[/tex] = ?
using magnification formula
m = h'/h
20 = h'/0.5
h' = 20× 0.5 =10 mm
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What is the speaker doing in Mending Wall?
The speaker of the poem is an unnamed person who lives in a clearly rural place and who questions the notion of keeping up a wall that keeps breaking down every year.
What is a poem?
Poetry (derived from the Greek poiesis, "to create"), also called poetry, uses the aesthetic and often rhythmic qualities of language (phonetic aesthetics, tonal symbolism, time signatures, etc.) to express "or" instead of one plain and obvious meaning. A poem is a literary work written by a poet according to this principle.
Poetry has a long and tumultuous history and has undergone different developments around the world. It goes back at least to prehistoric African hunting poetry and court poetry of praise and lamentation of the kingdoms of the Nile, Niger and the Volta Valley.
The speaker of the poem is an unnamed person who lives in a clearly rural place and who questions the notion of keeping up a wall that keeps breaking down every year.
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What are the 4 types of reinforcement?
The four types of reinforcement include- positive reinforcement, negative reinforcement, punishment, extinction.
Positive reinforcement: Positive reinforcement is especially effective at establishing new behaviors, but it may not work as well in the long term if the subject becomes bored with the reward over time. This involves adding something to increase response, such as praising a child when they complete a designated task.
Negative reinforcement: Namely, negative in this theory means removing or subtracting something that either discourages negative behavior (punishment) or removes adverse stimuli to support or encourage certain behavior (reinforcement). This involves removing something to increase response, such as withholding payment until the person completes the job. The person would remain motivated till the end of the job to acquire the payment.
Punishment: Punishment is often mistakenly confused with negative reinforcement. Remember, reinforcement always increases the chances that a behavior will occur and punishment always decreases the chances that a behavior will occur. This involves adding something aversive to modify behavior. For example, yelling at a child for misbehaving. In this example, the child would associate every negative behavior with punishments. This would prevent the child from repeating such behavior.
Extinction: This involves removing or taking away something to modify a certain response. This is called negative punishment or extinction. For instance, a teenager comes home late, and the parents curb their phone usage. Next time, the teenager would think before breaking the curfew.
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A 0.22-kg ball on a stick is whirled on a vertical circle at a constant speed. when the ball is at the three o'clock position, the stick's tension is 16 n. find the tension in the stick when the ball is (a) at the twelve o'clock and (b) at the six o'clock positions.
a) The tension in the stick when the ball is at twelve o'clock is 6N.
b) And at the six o'clock position is also 16N.
To determine the tension in the stick when the ball is at the three o'clock, twelve o'clock, and six o'clock positions, we can use the equation:
T = m × v² / r
where T is the tension in the stick, m is the mass of the ball, v is the speed of the ball, and r is the radius of the circle.
In this case, the mass of the ball is 0.22 kg, the speed of the ball is constant, and the radius of the circle is the same at all positions. Therefore, the tension in the stick will be the same at all positions.
Plugging the values for the mass and radius of the circle into the equation gives us the following:
T = 0.22 kg × v² / r = 16 N
Therefore, the tension in the stick when the ball is at the three o'clock, twelve o'clock, and six o'clock positions is 16 N.
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heather and jerry are standing on a bridge 51 m above a river. heather throws a rock straight down with a speed of 17 m/s . jerry, at exactly the same instant of time, throws a rock straight up with the same speed. ignore air resistance. part a how much time elapses between the first splash and the second splash? express your answer to two significant figures and include the appropriate units.
Jerry launches his rock upward at a speed of 20 m/s. It will slow down until its velocity hits zero at a rate of 9.8 m/s2. At that point, it will have reached apogee and will start to plummet. Therefore, 20 m/(9.8 m/s) = 2.04 seconds. to your maximum height.
After 2.04 seconds, it will start to accelerate downward once more, this time by 9.8 m/s2. Therefore, it will arrive at the starting place after an additional 2.04 seconds while moving at 20 m/s. Then it will travel through time in a similar manner to Heather's rock.
Jerry's pebble will therefore impact the sea 4.08 seconds later than Heather's. For this issue, it is not important to know how high you are above the sea.
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What does 2 bonds mean?
2 bonds mean Double bond or the order of bond =2.
A double bond as the name suggests double, is usually formed when two atoms share two sets of electrons with each other.
As electrons are usually shared in pairs.
A covalent bond is a shared pair of electrons. A double bond between two atoms requires more energy to break than a single bond because four electrons are shared by the two atoms in the double bond.
Two electron pairs make up a double bond (bond order = 2), whereas three electron pairs are shared by a triple bond (bond order = 3). Bond order can be a fractional number.
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Question Completion Status:QUESTION 1Organizational commitment has been found to be positively correlated with all of the following exceptan employee's agean employee's time on the job.an employee's level of educationthe current job market.2 pointsQUESTION 2Shannon is given random bonuses of varying amounts throughout the year based on "how well the company is doing." She is being reinforced using afixed ratio schedule.variable ratio schedule.fixed interval schedule.variable interval schedule.2 pointsQUESTION 3Glass created a computer game experiment whose results indicated that Type A subjects?Showed a significantly higher physiological stress response rates than the Type B subjects, but recovered back to baseline rates as quickly as the Type Bs.Showed significantly lower physiological stress response rates than the Type B subjects.Showed similar physiological stress response rates to the Type B subjects in the game, but had a signficantly higher stress response to the "harrass" condition.Showed significantly higher stress response rates but beat the game more times than the Type B subjects.2 pointsQUESTION 4According to goal-setting theory, the key determinants of motivation in the workplace arejob satisfaction and the accomplishment of goals.monetary incentives associated with meeting goals.specific, challenging opportunities and commitment to goals.specific, challenging opportunities and organizational policies directed at goal attainment.2 pointsQUESTION 5There is a negative correlation between age and voluntary absenteeism.TrueFalse
Explanation of the Current Job Market: Numerous studies have demonstrated considerable favourable Additional: Organizational commitment is strongly positively correlated with job satisfaction.
People who are more satisfied with their jobs The value of the collection of employee actions that either positively or negatively influence the achievement of company goals is referred to as With the exception of an employee's age and length of service, all of the following have been proven to be positively connected with organisational commitment. Examples of employment enrichment include diversifying skill sets, giving roles more responsibilities, giving work a deeper purpose, fostering autonomy, and providing feedback. Adding more of the same obligations associated to the same position satisfaction won't achieve the purpose of exposing the person to tasks typically allocated for higher positions or those with more specialised duties
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after a ball is thrown upward and is in the air, what will its acceleration do? remain the same decrease and then increase increase and then decrease decrease increase
During the entire throw, the ball accelerates at the same rate (9.8 m/s2 toward the earth). The ball is moving upward and stays in that direction.
While it is in the air, does its acceleration rise, fall, or remain constant?
Throughout the entire time the penny is in the air, the acceleration is constant. (If there is no wind and air resistance is disregarded, the acceleration is caused by gravity, which is always constant.)
What happens to the ball's speed now—does it rise or fall?
During its downward trajectory, the ball's speed will progressively grow. Experts' step-by-step guidance will help you eliminate doubt and get good exam results.
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a 125N object vibrates with a period of 3.56s when hanging from a spring. what is the spring constant of the spring?
Answer:
The differential equation gives the angular velocity as sqrt(k/m) where m = mass of the object = 125/9.8 = 12.755. Where k = spring constant, pi = 3.14
We are told that the period is 3.56 seconds. But angular velocity = (2*pi)/P where p (period) = 3.56 seconds.
Equating the two angular velocity expressions gives (2*pi)/3.56 = sqrt(k/12.755)
Solving for k, we get k = 39.73.
Explanation:
. If five forces f₁-20N at N30°E, f₂= 40N along the west, f3=50N at N50°W, f4 = 10N on angle 270° and f5=70N on angle 200° are acting on a box find the magnitude and direction of the resultant force on the box.
If the mass of the bar is 50kg, and Shelbi exerts 550N of force, what is the acceleration of the bar?
If the mass of the bar is 50kg, and Shelbi exerts 550N of force, the acceleration of the bar is 11 N/m².
Describe force.A push, pull, or hit on any object that causes a change in its state of motion is referred to as applying force. One thing experiences a force from another. For instance, we can say that when a force was applied to the box in the form of a push, it changed its state from rest to motion because when a box is pushed, it goes forward and changes its state of motion.
Describe acceleration.Accelerations are vector quantities. According to Newton's Second Law, an object's acceleration is the result of two factors working together: the object's mass, which varies depending on the materials it is made of, and the net balance of all external forces acting on it.
Briefing:Acceleration= Force/Mass =550/50 = 11m/s²
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the diagram shows a diver underwater.680N,600N
The resultant force that is acting on the diver is 80N.
What is the resultant?We know that the idea of the resultant force is that it is the kind of force that is the result of the action more than one force acting on an object. As such, the resultant force is the effective force that acts on an object that under the action of a given system of forces.
Now we can see that there is an upward and a downward force that is acting on the diver as we can see and the forces are in opposite direction thus the resultant of the forces can be obtained by subtraction. The resultant force is obtained as; 680 N - 600 N= 80N
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What is the formula for photoelectric effect?
The formula of photoelectric effect is E = hf = Φ + ½ mv²m
What is the photoelectric effect?
Electrons (i.e., electrically charged particles) are quickly emitted by the surface of photoelectric materials when electromagnetic radiation of a specific frequency (i.e., above Threshold Frequency) falls on it. This phenomenon is known as the photoelectric effect.
The photoelectric effect is a phenomena whereby electrons can be released from the surface of a metal when light shines on it. The electrons that are released from the metal are known as photoelectrons, and this process is also sometimes referred to as photoemission.
E = hf = Φ + ½ mv²max
h = Planck's constant (J s)
f = the frequency of the incident radiation (Hz)
Φ = the work function of the material (J)
½ mv2max = Ek(max) = the maximum kinetic energy of the photoelectrons (J)
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A baseball player throws a 0. 5 kg baseball to a teammate. When the ball reaches a height of 15 m and has a velocity of 40 m/s, what is the total mechanical energy of the ball?.
The total mechanical energy of the baseball is found to be 473.5 J
The total mechanical energy of the ball will be given by the sum of the total potential energy and the total kinetic energy of the ball which will be given by the relation,
ME = KE + PE
ME = 1/2Mv²+Mgh
Where,
M is the mass of the ball V is the velocity of the ball h is the height of the baseball.
It is given to us that the baseball player has thrown the baseball towards another player when the ball is reach the height of 15m it attend us velocity of 40m/s and the mass of the ball is given to be 0.5 kg.
Now, putting all the values in order to find the mechanical energy of the ball,
ME = 1/2(0.5)(40)²+0.5(9.8)(15)
ME = 473.5 J.
The total mechanical energy of the baseball is 473.5 J.
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What is the wavelength answer?
Wavelength is basically the distance between two successive crests or troughs in a wave.
What are Crests?
Crests are points on a wave where the amplitude is at a maximum. In physics, they are used to describe the shape of a wave, and the amplitude of the wave is measured from the crest to the trough.
Wavelength is typically measured in meters (m) or nanometers (nm). Wavelength is an important parameter in wave mechanics and is related to the frequency of the wave and its speed. Wavelength is inversely proportional to frequency, meaning that as frequency increases, wavelength decreases.
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