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Sophie [7]
3 years ago
13

What is the difference between stretching a t-shirt and stretching a rubber band

Physics
2 answers:
Rashid [163]3 years ago
7 0
B.the rubber band will return to its original shape the t shirt wont.
Elina [12.6K]3 years ago
6 0

B) The rubber band will return to its normal size and shape, the t-shirt won't.

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The amount of matter in an object is its _____.
Andrew [12]
The amount of matter in an object ismass....anything that occupies spaca and has weight is called matter.....
7 0
3 years ago
5. Sarah is standing 32.0 m away from Jason. If Sarah throws a snowball at a 45 degree
padilas [110]

Answer:

Explanation:

If air resistance is ignored and assume UP and Toward Jason are the positive directions.

horizontal analysis

d = (vx₀)t

t = d/vx₀

horizontal analysis

0 = vy₀t + ½gt²

0 = vy₀(d/vx₀)+ ½g(d/vx₀)²

as vy₀ = v₀sin45 and vx₀ = v₀cos45 and are equal.

0 = d + ½g(d²/v₀²cos²45)

-d = ½g(d²/v₀²cos²45)

-dv₀² = ½g(d²/cos²45)

   v₀² = -½g(d/cos²45)

   v₀² = -½(-9.81(32.0/cos²45)

   v₀² = 313.92

   v₀ = 17.717787...

   v₀ = 17.7 m/s

7 0
3 years ago
A 1250-kg compact car is moving with velocity v1 =36.2i^+12.7j^m/s. It skids on a frictionless icy patch and collides with a 448
MA_775_DIABLO [31]

Momentum is conserved, so the sum of the separate momenta of the car and wagon is equal to the momentum of the combined system:

(1250 kg) ((36.2 <em>i</em> + 12.7 <em>j </em>) m/s) + (448 kg) ((13.8 <em>i</em> + 10.2 <em>j</em> ) m/s) = ((1250 + 448) kg) <em>v</em>

where <em>v</em> is the velocity of the system. Solve for <em>v</em> :

<em>v</em> = ((1250 kg) ((36.2 <em>i</em> + 12.7 <em>j </em>) m/s) + (448 kg) ((13.8 <em>i</em> + 10.2 <em>j</em> ) m/s)) / (1698 kg)

<em>v</em> ≈ (30.3 <em>i</em> + 12.0 <em>j</em> ) m/s

7 0
2 years ago
How does quantum theory explain the emission spectra of atoms?
ankoles [38]
The correct answer is B.

Let us think of the classical theory first. In the classical theory, light is a wave that gives energy. This energy gradually helps the electron jump to a higher energy level.
In quantum theory, this is wrong; an electron cannot absorb a small amout of energy because there is not close enough state to jump to with that energy; only very specific amounts of energy lead to a change in orbital levels/ absorbance of energy. Also, each pair of energy levels has a specific energy difference that is needed from an electron so that it can move.
Hence, B is correct; all other sentences describe classical models of light-electron interactions

4 0
3 years ago
Read 2 more answers
up off the ground a distance of 0.31 m before releasing her. Assume the partner’s velocity is zero at the beginning and the end
Anton [14]

Answer:

work done he has done is equal to 6452.712 J

Explanation:

given,                                                    

Assume the mass of the cheerleader be equal to 70.8 kg

she is lift up off to the height of 0.31 m              

acceleration due to gravity = 9.8 m/s²                        

number of time she was lift = N = 30 times

work done = N W                            

W = m g h                                          

work done = N m g h                    

work done = 30 x 70.8 x 9.8 x 0.31

                   = 6452.712 J                  

hence, work done he has done is equal to 6452.712 J

7 0
3 years ago
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