Answer:
The right solution is "2.5 m/s²". A further explanation is given below.
Explanation:
The given values are:
Initial velocity,
= 20 m/s
Final velocity,
= 0 m/s
Time,
= 8 s
As we know,
⇒ [tex]Acceleration=\frac{Final \ velocity-Initial \ velocity}{2}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{0-20}{8}[/tex]
⇒ [tex]=\frac{-20}{8}[/tex]
⇒ [tex]=-2.5 \ m/s^2[/tex]
When a ball at a billiard table hits another ball it is an example of elastic collision?
The collision of two billiard balls is an example of elastic collision.
An elastic collision is a collision where Kinetic energy is preserved. In this type of collision, there will be no change in overall kinetic energy and momentum.
An inelastic collision is where the Kinetic energy is not preserved. Here some of the kinetic energy is transferred to some other form of energy like thermal energy or sound energy.
In both type of collisions, momentum is preserved. There are fewer examples of perfectly elastic collision in real life. Collisions in atomic levels are examples of perfectly elastic collisions. But some collisions where the energy loss is negligible are considered elastic collisions. One such example is the collision of the billiard balls.
So when a billiard ball hits another it is an elastic collision.
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an object slides across a horizontal surface such that it slows down due to the force of friction that is exerted on the object. the object and the direction of its displacement are shown in the figure. which of the following free-body diagrams could represent the forces that are exerted on the object?
F normal up, Fg down, small arrow left F friction
There are three forces acting on the sliding object across a horizontal surface. These are normal force, gravity force and friction force.
The direction of normal force is always upward. This force is acting on the object against the gravity. Gravity force is towards the center. Gravity force causes downward sliding of the object.
There is a third force also in action. Friction force exists between surface of two objects when one object is moved on the surface of another object, or is tried to move. Friction force acts against the motion of an object.
The correct option is B.
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Use the graph to calculate the distance, in m, between station B and station C.
The distance from station B to station C as seen in the velocity time graph is calculated as; 6000 m
How to interpret Velocity Time Graph?Velocity-time graph is simply defined as a plot that shows the relationship between Velocity and Time.
Now, the velocity time graph attached shows the motion of the movement of the train from station B to station C.
Now, when it comes to velocity time graph, we have to know that the area of a velocity time graph, gives us the overall distance covered by the motion it represents.
Since the velocity time graph is a trapezium shape, then we will use the are of a trapezium formula to get the distance from station B to station C.
Area of trapezium = ¹/₂(sum of parallel sides) * height
Plugging in the relevant values from the graph gives;
Distance = ¹/₂(300 + 100) * 30
Distance = ¹/₂ * 400 * 30
Distance = 6000 m
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Which ion in the ground state has the same electron configuration as an atom of neon in the ground state.
Na+ ion in the ground state has the same electron configuration as an atom of neon in the ground state.
The electronic configuration has been defined as the electron address in a atom. The electronic configuration has been based on the quantum rule for the filling of the electrons.
Neon is the tenth element with a total of 10 electrons. In writing the electron configuration for neon the first two electrons will go in the 2p orbital. Since 1s can only hold two electrons for Ne go in the 2s orbital. The remaining six electrons will go in the 2p orbital. Therefore, the Ne electron configuration 1s22s22p6.
Ne (atomic number=10) have 2,8 electron configurations. Here the atomic number of Na is 11. The configuration of Na is 2,8,1. Atomic number of Na+ is 10 and it has an electron configuration of 2,8 which is similar to Ne. Na+ ion is a positively charged particles, because they are missing one electron.
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What is the line segment formula?
Formula of
Line segment
is AB =
[tex]\sqrt{(x_{2} -x_{1} )^{2} } +\sqrt{(y_{2} -y_{1} )^{2} }[/tex]
Line segment
is a part of line with definite length. It has two ending points whereas a line has no end points and extended infinitely in both the direction. Line which joins both ending points with possible shortest way is known as
Line segment
.
A ______________________ B
(x₁,y₁) (x₂,y₂)
This line segment can be represented as [tex]\frac{}{AB} /\frac{}{BA}[/tex]. In other word we can say line segment is
subset
of line, so it contains all the points of line lying between both end point of segment. For shorter length it can simply measure by
ruler
. A bar (-) is always on top of its notation {[tex]\frac{}{AB}[/tex]}.
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Formula of Line segment is AB = [tex]\sqrt{(x_{2}-x_{1})^{2} } +\sqrt{(y_{2}-y_{1})^{2} }[/tex]
Line segment
is a part of line with a definite length. It has two ending points whereas a line has no end points and extended infinitely in both the direction. Line which joins both ending points with possible shortest way is known as
Line segment
A ______________________ B
(x₁,y₁) (x₂,y₂)
This line segment can be represented as[tex]\overline{AB}/\overline{BA}[/tex] . In other word we can say line segment is subset of line, so it contains all the points of line lying between both end point of segment. For shorter length it can simply measure by ruler A bar (-) is always on top of its notation {[tex]\overline{AB}/\overline{BA}[/tex]}.
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Which force is greater static or sliding friction?
Sliding friction is significantly less than static friction for a pair of specified surfaces. because moving an object in motion is simpler than moving an object at rest.
Why do sliding and static friction differ?Contact points are not given enough time to fully interlock while sliding. thus, less friction. But because the surfaces interlock so effectively while the object at rest, friction increases. The difference between static and sliding friction is thus explained.
Why is static friction at its highest?Friction force has an identical amplitude in the reverse direction to any little force applied to an object. The greatest static friction force on an item is s times the usual force.
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suppose you have a microphone that is only sensitive to sounds between 400 and 1300 hz. you record the sound and look at the fft. there are large peaks at 600, 900, and 1200 hz. you know that the sound contains all (both even and odd) harmonics. what is the fundamental frequency of the sound?
the fundamental frequency is 300 Hz is the answer.
Constructive Frequency
Peak frequency differences are different by
= 1200 - 900 = 900 - 600 = 300 Hz
hence, the fundamental frequency is 300 Hz.
Since the frequency of constructive interference is an integer multiple of the fundamental frequency, the fundamental frequency can be calculated from the difference between two successive peak frequencies.
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How does the induction motor works?
Answer:
It uses electromagnets to create a rotating magnetic field.
Explanation:
I remember learning this in AP Physic class. The interaction between the two fields causes the rotor to turn and it creates a magnetic field!
Answer:
It generates a rotating magnetic field using electromagnets.
What is frequency give its formula and units?
Answer: f = c/lambda
Explanation:
f = frequency
c= speed of light constant
lambda = wavelength
Unit -> hertz (Hz)
A 2 kg stone moves with a speed of 1 m/s. A second 2 kg stone is moving twice as fast. Compare their kinetic energies.
The second 2 kg stone has four times the kinetic energy of the first 2 kg stone.
The kinetic energy of an object is equal to (1/2) * m * v^2, where m is the mass of the object and v is the velocity of the object.
For the first 2 kg stone, the kinetic energy is
(1/2) * 2 kg * 1 m/s^2 = 1 kg m^2/s^2.
For the second 2 kg stone, the velocity is twice as fast, so the kinetic energy is
(1/2) * 2 kg * (2 m/s)^2 = 8 kg m^2/s^2.
The second 2 kg stone has 8 kg m^2/s^2 of kinetic energy, which is four times the kinetic energy of the first 2 kg stone, which has 1 kg m^2/s^2 of kinetic energy.
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What does MgBr2 mean?
The chemical formula of Magnesium Bromine MgBr₂.
Magnesium bromide is a chemical compound which is formed by the combination of magnesium and bromine.
The chemical formula of Magnesium Bromine MgBr₂.
The colour of Magnesium Bromine is white and it is a very deliquescent crystalline type solid in nature.
It can be sometimes used as a mild sedative and also we can use is as an anticonvulsant which is commonly used in the treatment of nervous disorders.
It can be easily soluble in water and sometimes it can also be easily dissolved in alcohol.
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What are the 10 common genetic disorders?
The 10 most prevalent genetic disorders include albinism, Angelman syndrome, Ankylosing spondylitis, Apert syndrome, Charcot-Marie-Tooth disease, Congenital adrenal hyperplasia, Cystic fibrosis, and Down syndrome.
What genetic ailment is the most prevalent?The most prevalent, deadly hereditary disease in the US is cystic fibrosis (CF). The condition affects about 30,000 persons in the US.
What exactly do you mean by genetics?How traits and genes are passed down from one generation to the next is the main topic of genetics research. Our DNA contains information that affects our personalities, looks, and even health! Everything starts with genetics. One child has blonde hair like their mother, and their sibling has brown hair like their father; this is due to genetics.
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What is the power rating of an engine capable of lifting a 100 kg object 5 m vertically in 4 seconds? do not include units in your answer.
The power rating of an engine who can lift a 100kg object 5m vertically in 4 seconds is 125watt.
In electrical engineering and mechanical engineering, the power rating of equipment is the highest power input allowed to flow through particular equipment. According to the particular discipline, the term power may refer to electrical or mechanical power.
From the question given :
Force (f) = 100
Time (t) = 4 seconds
Distance (d) = 5m
Work done = f * d
= 100 * 5
= 500
So, The power will be
= Work / time
= 500 / 4
= 125watt
Therefore, the power rating of the engine is 125watt.
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A ball of mass M is on a horizontal surface with negligible friction. One end of a string is attached to the ball so that it is spun in a horizontal circle of radius R at a tangential speed vo, as shown in Figure 1. A free-body diagram for the ball at an instant in time is shown in Figure 2. The magnitude of the tension force is also indicated in Figure 2. Which of the following equations represents the centripetal acceleration of the ball if its tangential speed is increased to 2vo ?
The centripetal acceleration of the ball if its tangential speed is increased to 2 v₀ is (4 M v₀²)/R.
The centripetal force equation that we are aware of is
F = (m* v²)/r ----(1)
where,
m is the of the ball
v is the velocity
r is the radius
We are aware that F = m* a ----(2)
Equating (1) and (2), we have,
m* a = (m* v²)/r
a = v²/r -----(3)
where, a is centripetal acceleration
In this problem, it is said that, the tangential speed is increased to 2 v₀, then the centripetal acceleration
So, v = 2 v₀, r = R
Substituting the values in (3), we have,
ac = (2 v₀)²/R = 4 v₀²/R
Thus, the required centripetal acceleration is 4 v₀²/R.
The question is incomplete. The complete question has the missing figures that are attached in the attachment below.
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which wavelength of the band on the helium emission line spectrum has the most energy? which has the lowest?
The light emitted by hydrogen atoms appears red because the most intense line in its spectrum, at 656 nm, is in the red section of the visible spectrum.
The principal quantum number(n) for the Lyman series is 1. As a result, the Lyman series has the highest energy in the hydrogen spectrum. This is due to the fact that helium has more electrons than hydrogen. Helium has two, while hydrogen has only one. More spectral lines will be noticed as more electrons are stimulated. Helium therefore has more spectral lines than hydrogen. Gamma rays are the most energetic, have the shortest wavelengths, and have the highest frequencies.
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15-28 a type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. what spring constant is needed to produce a period of 0.500 s for a 0.0150-kg mass?
Spring constant is needed to produce a period of 0.500 s for a 0.0150-kg mass: The required spring constant is 2.368.
What is the time period of a spring-mass system?
The time period of a spring-mass system is the amount of time it takes for the system to complete one full cycle of oscillation. This time period is determined by the system's spring constant and mass, and is calculated using the formula: T = 2π√(m/k), where m is the mass of the system and k is the spring constant. In a spring-mass system, the time period is typically short and can range from a few microseconds to several seconds. The time period of a spring-mass system is an important factor when designing a system, as it can affect the performance of the system. If a system is required to complete multiple cycles of oscillation within a given amount of time, then the time period must be short enough to accommodate this.
T = 2π√(m/K)
In the given problem,
Time period , T = 0.5 s
Mass, m = 0.0150-kg
T = 2π√(m/K)
K = 4π²m/T²
= 4× π² × 0.015 / 0.5²
= 0.592/0.25
= 2.368
Therefore the required spring constant is 2.368
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What is the velocity of a wave that has a wavelength of 3.0 m and a frequency of 12 Hz?
It travels at a speed of 36 meters per second
The velocity of a wave is a measure of how fast the wave travels through a medium. It is given by the equation v = λf, where v is the velocity, λ is the wavelength, and f is the frequency. In this case, the given wavelength is 3.0 meters and the given frequency is 12 Hertz.
Plugging these values into the equation, we can calculate the velocity of the wave:
v = (3.0 m) * (12 Hz) = 36 m/s.
This means that the wave travels at a speed of 36 meters per second.
It is important to note that the velocity of a wave depends on the properties of the medium through which it is traveling, as well as the wavelength and frequency of the wave itself.
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892-kg sports car is moving 14.6 m/s when it rear ends with stopped car having an identical mass at a stop light. Two cars entangle and move together after the collision. What is their speed immediately after the collision
The speed of the cars immediately after the collision will be the same as their speed before the collision, which is 14.6 m/s. In a perfectly inelastic collision, the objects involved in the collision will move together with the same speed after the collision as they had before the collision. This is because the total kinetic energy of the system is conserved in a perfectly inelastic collision.
Classify the measurements as having English units or metric units. English units Metric units Answer Bank 2.50 lb 2. 20 kg 335 ml. 33.21 oz 12.2 26.9 mm Now, classify the units of the measurements as units of length, mass or volume.
A decimal system of measurement, the metric system was developed in France in 1799 and has since been widely used around the world.
The metric system serves as the foundation for the International System of Units, the universally accepted system of measurement. Although the United States legal framework was modified in 1866 to permit the use of the metric system, the country has not yet adopted it as its "official" system of measuring. Body-based measuring was the foundation on which the United States English System of measurement was built. Traditionally, the foot, the inch, and the pound have served as the foundational units of measurement in the English system. Metric prefixes like kilo, Millis, and centi are used to denote multiples of a base unit, such as the meter or the gram. When it comes to measuring length, the English system has a bad reputation.
The complete answer is attached as an image.
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in a closed system, an object with a mass of 10 kg moves at a velocity of 5.4 m/s. it collides with a second object that has a mass of 12 kg and that is moving in the opposite direction with a velocity of 3.5 m/s. what is the total momentum of the system after the collision?(1 point) responses 42 kg-m/s
The total momentum of the system after collision is 12 kg-m/s.
What is collision?Two items collide when they come into brief physical touch with one another. Or to put it another way, a collision is a reciprocative engagement between two masses that lasts for a relatively brief time and results in a change in momentum and energy.There are, however, three distinct types of collisions: elastic, inelastic, and absolutely inelastic. I'll say it again: in all three categories of collisions, momentum is preserved. The transformation of kinetic energy characterizes collisions.A collision is an instantaneous interaction between two or more bodies, occurring at the same time, that modifies the motion of the bodies involved as a result of the internal forces acting on them. Conflicts involve troops (there is a change in velocity). Before impact, there is a significant differential in velocity that is this size.To learn more about collision refer to:
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How do you find the maximum speed of emitted photoelectrons?
We must first calculate the kinetic energy of an emitted electron from the energy of an incoming photon and the work function of the metal surface in order to estimate the maximum speed of an emitted photoelectron (the minimum energy required for an electron to escape the metal surface).
Using the equation below, these are connected. E (total energy supplied by a photon) equals +Ek From the Planck's equation,
E=hf, where E is energy,
h is Planck's constant (6.6310(-34)Js), and
f is frequency, one may determine the energy of a single photon.
Since the wavelength is what we have here instead of the incident frequency, we can apply the equation
f=c/lambda to calculate the frequency.
F is the frequency,
c is the speed of light (3.0010(8)m/s), and
lambda is the wavelength.
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galilea was the first scientist to do which of the following
Answer: Use a refracting telescope to make important astronomical discoveries.
Explanation:
How do I improve my scope 3 emissions?
To encourage action, establish clear expectations with your vendors and engage them strategically.Companies have to go beyond data collecting and establish clear expectations on suppliers about emissions reduction in order to significantly cut upstream Scope 3 emissions.
Why are the scope 3 challenging?The enormous number of partners inside the value chain is one factor contributing to the difficulty of accounting on Scope 3 emissions.For major companies, the number of upstream supply chain partners who contribute to Category 3 emissions can range from hundreds to tens of thousands, and they may be located all over the world.
How may Level 3 GHG emissions be reduced?Reducing the amount of goods purchased can take many different forms, including switching to incoming materials with such a lower CO2 content, reducing input quantity, using recycled materials as inputs, reducing production waste, favoring more sustainable suppliers, and working with important suppliers to reduce their own carbon footprints.
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What does sonar do with seafloor spreading?
Sonar is largely used by NOAA scientists to create nautical charts, find underwater navigational hazards, find and map things on the bottom like shipwrecks, and map the actual seafloor. Sonar comes in active and passive varieties.
Why do we use sonar to investigate the ocean floor?
Due to the fact that sound waves travel further in water than radar and light waves, sonar is utilised in oceanography. The passenger freighter Robert E. Lee as captured by side-scan sonar in 2001 by the HUGIN 3000 AUV.
Reversed geomagnetic field
In the early 20th century, scientists were able to first recognise the process of seafloor spreading thanks to the magnetism of mid-ocean ridges.
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What is bulk modulus of water?
Answer:
Water has a bulk modulus of around 300,000 psi (2.1 GPa) and so a compressibility of 3.3 106 (psi)1.
Explanation:
Rita is riding a 7.0 kilogram bike at a velocity of 15 meters/second. rita’s mass is 42 kilograms. what is her momentum?
a. 1.0 × 102 kilogram meters/second
b. 5.2 × 102 kilogram meters/second
c. 6.3 × 102 kilogram meters/second
d. 7.4 × 102 kilogram meters/second
e. 8.5 × 102 kilogram meters/second
Rita's momentum when riding a 7kg bike at a velocity of 15m/s where her mass is 42kg is 7.4 * 10² kilogram meters / second. Therefore, the answer is D.
How to calculate Rita's momentum?In Newtonian mechanics, momentum is the product of the mass and velocity of an object. It's a vector quantity, possessing a magnitude and a direction.
Based from the question, given :
mass of bike = 7kg
mass of Rita = 42kg
velocity = 15m/s
Momentum (P) = mass * velocity
= (mass of bike + mass of rita) * 15
= (7 + 42) * 15
= 49 * 15
= 7.4 * 10² kilogram meters / second
Therefore, the answer is D.
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Why are digital signals more reliable than analog signals? (give an example as well please)
Digital signals more reliable than analog signals because of the many following reasons:
Digital signals are transmitted at a specific frequencies and amplitudes so the possibility of the signal being distorted is less than the analog signals.In Digital Signals or processing the digital information can be easily encrypted and compressed for digital use.Digital signals are time separated than analog one. What are analog Signals?Analog Signal is a Continuous type signal which has one time varying quantities such as Voltage, Pressure, etc. As in the analog audio signal the instantaneous voltage continuously varies with the sound wave's pressure.
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given a uniform one meter long stick with a mass 0.100 kg a mass of 0.020 kg is placed 5.00 cm away from the end of the stick om the table g how far can the center of mass of the stick be moved to the right before the stick begins to rotate
The center of mass of the stick will be moved above 79.2 cm to the right before the stick begins to rotate.
What is the equilibrium position of the meter rule?
The equilibrium position of the meter rule is the point at which all the forces acting on the meter rule sums to zero.
The equilibrium position of the meter rule is determined by taking moment about the center mark or the end position.
-------5cm---------------------------------------------------------100cm
↓ x ↓
0.02 kg W
sum of anticlockwise moment = sum of clockwise moment
0.02 (x) = W (100 - (5 + x) )
0.02x = 0.1 ( 100 - ( 5 + x ) )
0.02x = 0.1 ( 100 - 5 - x )
0.02 x = 10 - 0.5 - 0.1x
0.12 x = 9.5
x = 9.5 / 0.012
x = 79.2 cm
Thus, when the center mass is moved any distance above 79.2 cm, the meter stick will begin to rotate.
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The primary blast cell for bone is the
O hemangioblast
O fibroblast
O chondroblast
O osteoblast
O hemocytoblast
Which of the following is NOT a type of connective tissue?
O Adipose
O Bone
O Blood
O Alveolar
O Cartilage
Connective tissue extracellular matrix is composed of
O capillaries and cells
O ground substance and cells
O collagen fibers, elastic fibers and reticular fibers
O cells and fibers
O fibers and ground substance
Which of the following statements concerning connective tissue is TRUE?
O Cartilage tissue tends to heal less rapidly than bone tissue.
O Reticular connective tissue serves as the universal packing material between other tissues.
O Connective tissues that possess a large quantity of collagen fibers often provide the framework for organs such as the spleen and lymph nodes.
O The basic difference between dense irregular and dense regular connective tissues is in the amount of elastic fibers and adipose cells present.
O A major characteristic of fibrocartilage is its unique amount of flexibility and elasticity
A ciliated version of pseudostratified columnar epithelium containing mucus-secreting goblet cells
O lines most of the respiratory tract
O aids in digestion
O is more durable than all other epithelia
O is found in some of the larger glands
O protects underlying tissues in areas subjected to abrasion in the moist linings of the esophagus, mouth and vagina
a)The primary blast cell for bone is the osteoblast b) Alveolar is NOT a type of connective tissue. c) Connective tissue extracellular matrix is composed of fibers, and a ground substance d)Cartilage tissue tends to heal less rapidly than bone tissue. e))lines most of the respiratory tract of pseudostratified columnar epithelium containing mucus-secreting goblet cells.
In addition, blast cells known as myeloblasts can form. Young blood cells made by stem cells are what these are. The synthesis of red, white, and platelet-forming blood cells can also be hampered by an excess of blast cells. Bone marrow blasts are not expected in healthy individuals. When a person develops leukemia, aberrant, immature white blood cells—known as blasts—proliferate rapidly, filling up the bone marrow and blocking the creation of other cells vital to survival, such as red blood cells and platelets. Anemia, infections, and unusual bleeding result from this. Blast cells shouldn't make up more than 5% of the bone marrow cells in healthy individuals, and they often aren't present in the blood.
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What are 3 examples that carbon can be found in?
Carbon is also a constituent of diamonds and graphite.Diamonds, graphite, etc.Like diamond, graphite is a kind of carbon.Textiles.Carbon is found in cellulose, which is found in a variety of fabrics, including Life Itself.The basis of all life on the planet is carbon.
Where can I get examples of carbon?The majority of the carbon on Earth is preserved in sediments and rocks with the remainder found in the sea, atmosphere, or living things.These serve as the carbon cycle's reservoirs or sinks.
What kinds of objects are carbon-containing?Examples of carbon allotropes include coal, graphite, & diamonds.They differ physically while just having one type of element in common—carbon.For instance, while graphite is opaque, diamond is clear.
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