Final speed after collision with the wall

before collision the speed of ball initially

time taken for the collision

now as per the formula of acceleration we know that

now plug in all values in it


so acceleration is - 5 m/s/s for above situation
Answer:
it depends on temperature^^
Explanation:
hope this helped^^
1). an electric motor running
Electrical energy is changing into kinetic energy and a little bit of heat
2). light a match
The chemical energy stored in the match head changes into light and heat energy.
3). a light bulb
Electrical energy is changed into light and heat energy.
Answer:
One when it enters the glass slab from air and second time when it enters the air through glass slab. When light rays travelling through air enters glass slab, they get refracted and bend towards the normal. Now the direction of refracted ray changes again when it comes out of the glass slab into air.