Question

Please help me with this question...

Answer 1

1) In first case, both the objects(hand & tea) are in direct contact, so heat will flow by the process of "Conduction" 

2) In this case, objects are not in direct contact, and heat is transferring from one to another by "Convection"

3) Here, there is no contact between the objects (our body & sun), sun light with heat comes through the process of "Radiation"

In short, Your Answers would be:
1) Conduction
2) Convection
3) Radiation

Hope this helps!

Answer 2

The first is conduction. 

This comes as the hot water spills on to your hand through contact.

The second is convection. The hot air rising is due to convection currents being set up.

The third is radiation. This is heat transfer through space.