Answer:
I'm gonna give you more than 4 So u can choose.
Turn off all electricity, gas and water.
Unplug all electrical appliances.
Keep your emergency kit close at hand.
If the building starts to collapse, protect yourself with mattresses, rugs.
Stay tuned to the radio for updates.
Stay inside until told it is safe to go outside.
An 11.8 eV photon is absorbed by an electron in an atom, causing the electron to be excited from level 1 to level 3. The electron then emits a 4.1 eV photon and shifts to level 2. What photon will be emitted when the electron moves back to level 1?
a. 15.9 eV
b. 11.8 eV
c. 7.7 eV
d. 4.1 eV
Answer:
c. 7.7 eV
Explanation:
The computation of the photon emitted is shown below:
Given that
From level 1 to level 3, the energy absorbed by electrons is 11.8eV
And, when from level 3 to level3, the energy released by electron is 4.1eV
So, from level 2 to level 1, the energy released is
= 11.8 - 4.1
= 7.7
= 7.7eV
Hence, the third option is correct
The same is to be considered
And, the other options are wrong
3. A 142 g baseball is thrown at a speed of 42.9 m/s. What is the kinetic energy of the baseball at this moment?
261 )
131 )
O 6090 )
505 )
Kinetic energy (KE) is defined by the equation KE = { mu?.
Point
0
11
4. Harriet is practicing archery. As she draws back an arrow, the arrow has 34.3 of elastic notretia
have when it is about to hit the ground?
Answer: For question 1
131 is the correct answer
KE = 1/2 mv^2
Explanation:
3. A player catches a ball. The action force is the impact of the ball against the player's glove. The
reaction force is...
a. The force the glove exerts on the ball
b. The player's grip on the glove
c. The friction of the ground on the player's shoes
Why???
Answer:
Answer: A
Explanation:
Why?? Two objects meaning they have the same force pair must remain the same
Using Newton's third law, we find that the correct answer to the reaction force is a: the force of the glove on the ball
Given parameters
The force of the ball on the gloveto find
The reaction force
Newton's third law say that forces are produced in pairs, that is, when two bodies interact, one body feels the action of the other and responds with an interaction of equal magnitude but in the opposite direction. In general, these two forces are called action and reaction, they have the following characteristics:
They are equal in magnitude has the opposite direccion each one is applied to one of the interacting bodies
let's analyze the given options using Newton's third law:
a. True. The force of the ball is on the glove, it must respond with a force of equal magnitude on the ball, therefore these are two forces of action and reaction
b. False. The grip or the player's hand does not receive the action of the ball, it receives the action of the glove
c) False. the player's shoes do not interact with the ball, interact with the ground
In conclusions by using Newton's third law the correct answer is a: the force of the glove on the ball
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What parts are found in an electric generator? Check all that apply. an armature a battery a permanent magnet an electromagnet brushes slip rings
The major parts that are found in the Electric generators are Armature, Battery, Permanent magnet, Brushes and Slip rings.
The given problem is based on the concept and fundamentals of Electric generator. An electric generator is a machine which converts the mechanical energy into the electrical energy. Such that these energy is utilized for transmission and distribution over the power lines to domestic and commercial uses.
The major components of an electric generator are as follows:
A statorArmatureCommutatorBrushesSlip ringsBatteryPermanent magnetThus, we can conclude that the major parts that are found in the electric generators are Armature, Battery, Permanent Magnet, Brushes and Slip rings.
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An astronaut uses a Body Mass Measurement Device to measure her mass. Part A If the force constant of the spring is 3200 N/m, her mass is 65 kg, and the amplitude of her oscillation is 1.7 cm, what is her maximum speed during the measurement
Answer:
v = 0.119 m/s
Explanation:
Given that,
Force constant, k = 3200 N/m
Mass, m = 65 kg
Amplitude of her oscillation is 1.7 cm i.e. 0.017 m
We need to find her maximum speed during the measurement. Let it is v. It is given by the formula as follows :
[tex]v=\sqrt{\dfrac{k}{m}}A[/tex]
Where,
A is the amplitude
[tex]v=\sqrt{\dfrac{3200}{65}}\times 0.017 \\\\v=0.119\ m/s[/tex]
So, the maximum speed is 0.119 m/s.
The maximum speed of the astronaut during the measurement is 0.12 m/s.
The given parameters;
force constant, k = 3200 N/mmass of the astronaut, m = 65 kgamplitude of the oscillation, A = 1.7 cm = 0.017 mThe maximum speed of the astronaut during the measurement is calculated as follows;
[tex]v = \omega A\\\\v = \sqrt{\frac{k}{m} } \times A\\\\v = \sqrt{\frac{3200}{65} } \times 0.017\\\\v = 0.12 \ m/s[/tex]
Thus, the maximum speed of the astronaut during the measurement is 0.12 m/s.
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a ball falls 0.35m to the floor. it lands 3m from the edge of the table. what was the velocity of the ball before it left the table?
The ball rolls off the table with speed v from a height of 0.35 m, so that it covers a horizontal distance x with height y at time t of
x = v t
y = 0.35 m - 1/2 g t ²
where g = 9.80 m/s² is the magnitude of the acceleration due to gravity.
Solve for t when y = 0, i.e. the time it takes for the ball to reach the ground:
0 = 0.35 m - 1/2 g t ²
t ² = (0.70 m) / g
t ≈ 0.267 s
Now solve for v given that the ball falls 3 m away from the table:
3 m = v (0.27 s)
v = (3 m) / (0.27 s)
v ≈ 11.2 m/s
Which beaker has the most thermal energy?
Answer:
Large beaker has more thermal energy
A 60.0-cm, uniform, 5.00-kg shelf is supported horizontally by two vertical wires attached to a sloping ceiling. The front wire is inset by a distance of 20 cm. A very small 2.50-kg tool is placed on the shelf midway between the points where the wires are attached to it.
Required:
Find the tension in the back wire.
Image is missing, so i have attached it
Answer:
Tension in back wire = 24.5 N
Explanation:
let the tension in the back wire be Tₒ
let the tension in the front wire be T
Applying static equilibrium in the vertical direction, we have:
T + Tₒ = (5 × 9.8) + (2.5 × 9.8)
T + Tₒ = 73.5
Where Tₒ = (2.5 × 9.8) = 24.5 N
Thus, Tension in back wire = 24.5 N
The tension in the back wire equals 24.5 N.
We can arrive at this answer with the static equilibrium formula, for that, let's consider that the tension in the back wire is represented by the letter "t," while the tension in the front wire is represented by the letter "T."
Therefore, we can use the following formula:
[tex]t= W*g\\t= 2,5*9.8\\t= 24.5 N[/tex]
In this case, the letter "W" refers to the tool weight, while the letter "g" refers to gravity.
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A monochromatic plane electric-field-wave has a peak value 20 V/m. What is the peak value of the Magnetic field?
Answer:
The peak value of the Magnetic field is 6.67 x 10⁻⁸ T
Explanation:
Given;
peak value of the electric-field, E₀ = 20 V/m
The peak of the magnetic field, B₀ = ?
The peak value of the magnetic field is given by;
B₀ = E₀/C
Where;
C is the speed of light = 3 x 10⁸ m/s
Substitute the givens and solve for B₀
B₀ = E₀ / C
B₀ = (20) / (3 x 10⁸)
B₀ = 6.67 x 10⁻⁸ T
Therefore, the peak value of the Magnetic field is 6.67 x 10⁻⁸ T
B₀ =
Which state of matter does this model represent?
Image of particles loosely packed that fill the bottom of the container
Solid
Liquid
Gas
Plasma
Answer:
Liquid
Explanation:
A liquid will fill its container and are neither tightly packed like a solid nor very loosely packed like a gas.
Answer: Its Solid
Explanation:
passenger move backward when bus at rest starts to move suddenly give reason
Venn diagrams are used for comparing and contrasting topics. The overlapping sections show characteristics that the topics have in common, and the sections that are unique to each topic show the characteristics that apply to only that topic. This Venn diagram is comparing mechanical and electromagnetic waves. 2 circles with an overlap. The left circled is labeled Mechanical Wave with further labels Carry Energy Through Matter and Examples: Ocean Waves and Sound Waves. The right circle is labeled Electromagnetic Wave with further labels Carry Energy Through Space and Examples: Light and X-ray. What could be put into the center section of this Venn diagram? “Carry energy through space” and “Follow a pattern” “Carry energy” and “Follow a pattern” “Carry energy through space” and “Can be heard” “Carry energy” and “Can be heard”
Answer:
Carry energy and follow a pattern
Both mechanical and electromagnetic waves will carry energy and follow a pattern.
What is meant by a wave ?A wave is defined as a disturbance that is formed in a medium and that carries energy.
Here,
A Venn diagram is given and the Venn diagram represents the comparison between mechanical waves and electromagnetic waves.
The main characteristics of mechanical and longitudinal waves are:
Mechanical waves require a medium in order to propagate such as water or air.
Electromagnetic waves differ from the mechanical waves such that the electromagnetic waves do not require a medium for propagation.
Therefore we can say that the electromagnetic waves will propagate through space whereas the mechanical waves will not travel through space, they need a medium.
Also, we know that waves carry energy. So, both the mechanical waves and electromagnetic waves will carry energy with them.
So, the center section of the Venn diagram will be carry energy and follow a pattern.
Hence,
Both mechanical and electromagnetic waves will carry energy and follow a pattern.
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Pleaseee helppp!!! Due in 10 minutes and I’m clueless
what forces are used to move a 20000 kilogram block of stone
Answer:
196200N
Explanation:
Fg=mg
Fg=?
m=20000
g=9.81
Fg= (20000kg)(9.81[tex]m/s^{2}[/tex])=196200N
Bru this was a challenge..........
Answer:
um
Explanation:
Answer: Dang thats tough g but u did it
Explanation:
Can u show me were these go on the picture:
Inner core
Crust/lithosphere
Lower mantle
Outer core
Upper mantle
Crust
Asthenosphere
Answer:
Here u go
Explanation:
? Question
Drag each label to the correct location on the table.
Classify the systems of equations based on the number of solutions they have.
No Solution
One Solution
Multiple Solutions
x + 2y = 1
x+10y = 50
2y - X= 12
2x - y = 17
x - 4y = 7
4x+10y = 40
2x + 5y = 40
3x+6y=3
2x+10y = 90
2y - 2 10
|2y - 3x = 5
No Solution:
4x+10y = 40
2x + 5y = 40
2x - 8y=17
x - 4y = 7
One Solution:
2y - X= 12
2y - 2x =10
x + 10y =50
2x + 10y =90
Infinitely Many Solutions:
x + 2y = 1
3x + 6y= 3
2y - 3x = 5
2/5y -3/5x =1
Explanation: You only had 11 equations listed. But I believe these are the ones you want. I took the test and got them right. Hope it helps
In a hydraulic system, a force of 400 N is exerted on a piston with an area of 0.001 m2. The load-bearing piston in the system has an area of 0.2 m^2.
Required:
a. Calculate in kPa the pressure in the hydraulic fluid induced by the applied pressure.
b. What is the magnitude of the force exerted on the load bearing piston by the hydraulic fluid?
Answer:
Explanation:
Pressure on the hydraulic system is expressed as;
Pressure = Force/Area
Given
Force on the fluid = 400N
Area = 0.001m²
Pressure in the fluid = 400/0.001
Pressure in the fluid = 400,000N/m²
1N/m² = 0.001kPa
400,000N/m² = x
x = 400,000 × 0.001
x = 400kPa
Hence the pressure in kPa is 400kPa
b) Using the formula;
Pa = Pb
Fa/Aa = Fb/Ab
Pa = Fb/Ab
Fb = PaAb
Fb = 400,000(0.2)
Fb = 80,000N
Hence the magnitude of the force exerted on the load bearing piston by the hydraulic fluid is 80,000N
A body on a 20m high cli drops a stone. One second later, he throws
down another stone. Both the stones hit the ground simultaneously. Find the
initial velocity of the second stone g=10m/sec2.
Taking the downward direction as positive
Stone 1:
Initial velocity (u) = 0 m/s
Acceleration (a) = 10 m/s²
Time taken to reach the ground (t) = t seconds
Distance covered (s) = 20 m
Stone 2:
Initial velocity (u) = u m/s
Acceleration (a) = 10 m/s²
Time taken to reach the ground (t) = (t-1) seconds
[where t is the time taken by stone 1]
Distance covered (s) = 20 m
__________________________________________________________
Time taken by the Stones to reach the ground:Stone 1:
Using the second equation of motion:
s = ut + 1/2*at²
replacing the variables for Stone 1
20 = (0)(t) + 1/2(10)(t)²
20 = 5t²
Dividing both sides by 5
t² = 4
Taking the square root of both the sides
t = 2 seconds
Hence, Stone 1 reaches the ground in 2 seconds
Stone 2:
The time taken by Stone 2 to reach the ground depends on the time taken by stone 1. Since we defined the time taken by stone 2 as:
Time taken by Stone 2 = (Time taken by Stone 1) - 1
replacing the values:
Time taken by Stone 2 = 2 - 1
Time taken by Stone 2 = 1 second
Hence, Stone 2 will reach the ground in 1 second
__________________________________________________________
Initial Velocity of Stone 2:According to the second equation of motion:
s = ut + 1/2 at²
replacing the values for Stone 2
20 = (u)(1) + 1/2(10)(1)²
20 = u + 5
u = 15 m/s
Therefore, the Stone 2 is thrown at a velocity of 15 m/s downwards
please help really easy
Answer:
I am sure it is A because no chemical change occurs and it is a physical change. If you can Brainllest than that would be great but if you wanna you don't have to. Hope this helps!! If wrong sorry.
Explanation:
what lifelong benifits can be at gained by participating in tract and field?
Answer:
stamina
Explanation:
because your lungs are expanding when you run, it'll help you learn how to control your breathing, it'll help you in other situations if you have to run.
Can solar be reused? Why or why not? Use in your own words.
Answer:
Yes becacuse it will never run out. The sun is there and it soakes the light up to create energy Solar is a renewable resourse.
Why were Brittany and Michael told that nobody wanted to continue working with them?
In the survey, other participants indicated that they were the ones with whom they did not want to continue to work.
They were randomly preassigned to the condition of social rejection.
They were chosen for the rejection condition because they belong to an ethnic minority.
They were confederates of the experimenter and acted in a way that guaranteed the other participants would dislike them.
Answer: They were randomly preassigned to the condition of social rejection.
Explanation:
Humans are said to be social beings which means that we survive in part due to our social connections. The experiment from the video was meant to research and evaluate what happens to human beings when they experience social rejection instead of acceptance.
There were four participants being Alexandria, Mike, Brittany and Michael. For the purpose of the research, Brittany and Michael were preassigned to the condition of social rejection whilst the other two were preassigned to acceptance with the goal being to observe the reactions of the parties after they find that they were either accepted or rejected.
Attached is the transcript to the video of the research summary.
If a car is traveling forward at a constant speed of 60 miles per hour, but then turns right without changing its speed, Is It accelerating? Explain why or why not?
Answer: no, because the speed remains constant.
Explanation:
if a car is moving down the highway at a constant velocity what does this mean about the cars acceleration?
thank you everyone and the barinly app
Answer:
youre very welcome can i get brainlist
Explanation:
An elephant and a mouse when dropped from the same height (ignoring
air resistance) will hit the ground at the same time because all objects fall
at the same rate of acceleration, regardless of their mass.
True
False
Answer:
True
Explanation:
Which shows the correct order of steps during the formation of an ionic bond?
Ions are attracted to each other → Electrons are transferred → An ionic compound forms
An ionic compound forms → Ions are attracted to each other → Electrons are transferred
Electrons are transferred → Ions form → Ions are attracted to each other
Ions form → Electrons are transferred → Ions are attracted to each other
Answer:
c
Explanation:
1- First electrons are transferred.
2-The ions are formed
3-The ions are attracted to form the compound
Answer:
answer is c.........
Explanation:
Which quantities define momentum?
A) how much weight an object has, plus magnitude of its acceleration.
B)how much force is pushing an object, plus it’s speed.
C)how fast can an object travel, plus its weight.
D)how much matter does an object has, plus the magnitude and direction of it’s motion
Answer:D
Explanation: a p e x
Object 1 is undergoing uniform circular motion at a radius of 10 cm. Object 2 is undergoing uniform circular motion at a radius of 0.2 m. If the objects have the same mass and are traveling with the same speed, which object is experiencing the larger centripetal force and why
Answer:
The first object is experiencing a larger centripetal force because its radius is smaller compared to the second object.
Explanation:
Given;
radius of the first object, r₁ = 10 cm = 0.1 m
radius of the second object, r₂ = 0.2 m
let the mass of the two objects, = m
let the speed of the two objects = v
The centripetal force of the first object is given by;
[tex]F_c_1 = \frac{mv^2}{r_1} \\\\F_c_1 = \frac{mv^2}{0.1}\\\\F_c_1 = 10mv^2[/tex]
The centripetal force of the second object is given by;
[tex]F_c_2 = \frac{mv^2}{r_2} \\\\F_c_2 = \frac{mv^2}{0.2}\\\\F_c_1 = 5mv^2[/tex]
Therefore, the first object is experiencing a larger centripetal force because its radius is smaller compared to the second object.