Question

Sue pumps up a bicycle tyre. As she does so, she notices that the pump becomes hot.
(a) Where, and how, was the energy stored before it was transferred in pumping up the tyre? (Single choice)


1 As Chemical Energy in Sue or her muscles

2 As Potential Energy in Sue or her bones

3 As Kinetic Energy in Sue or her muscles

4 As Chemical Energy in Sue or her bones

(b) Explain how the gas molecules inside the tyre exert pressure on the walls of the tyre. Single choice.


1 The movement of molecules get slower

2 The molecules collide with the walls of the tyre

3 Molecules do not exert any pressure

4 There are no walls in the tyre

(c) The air going into the tyre was warmed up by the pumping. What effect will this have on the motion of gas molecules in the air in the tyre? Single choice.


1 No effect

2 They slow down

3 They speed up

4 The molecules break apart

(d) When the air in the tyre becomes hotter, the pressure rises. Give one reason, in terms of the motion of gas molecules in the air, why the pressure rises. Single choice.

1 more collisions

2 the molecules move faster

3 the molecules hit the tyre wall more frequently

4 Pressure will not rise

(e) The pressure in the tyre increases as Sue forces more air into the tyre. Explain why a larger number of gas molecules increases the pressure in the tyre. Single choice.


1 there will be more frequent collisions with the tyre wall

2 there will be more collisions with the tyre wall

3 there is less space for the molecules

4 there are more air molecules to hit the tyre wall

Will mark as brainlist if answer all correctly thank youuu! Please help me out :)

Answer 1

Answer:

I am so sorry

Explanation:

I can't understand

Answer 2

Explanation:

there will b more collisions