Energy Test - 8...

A stone is thrown upwards then what will happen?

Iron glows in red color when it is heated to very high temperature reason behind this reaction is -

Energy transformation takes place in dynamo is a type of-

During photosynthesis, conversion take place by green plants-

A ball falls freely under gravity from rest. label the kind of energy it will possess on reaching the ground.

Conversion made by a thermocouple -

A metal ball is allowed to fall freely from rest from a height of 5m above the ground of mass 2kg (Take g = 10ms⁻²). After the ball hits the ground and comes to rest, mechanical energy is converted to:

In steam engine the conversion process will occur-

A moving coin hits another coin and sets it into motion. In this case energy from the moving coin is ---- to the other coin:

chemical energy is converted into heat energy hence the process is called-

An anti-aircraft shell has been fired which was having kinetic energy x. It explodes in the air. Then the sum of kinetic energies of all the particles will be-

In case of explosion of a bomb ,does not change-

A man of weight 60 kg wants to lose 5 kg by going up and down 10m high stairs. Assume he burns twice as much fat while going up than going down .If 1 kg of fat is burnt on expending 7000 k cal. How many times must he go up and down to reduce his 7 kg weight? (Take g=10ms⁻²)

Which of the following statements is correct?

Device that does not convert electrical energy into sound energy is called-