Question

TIONS
1. A metal spoon is dipped in a cup of hot milk. Name the process by which the spoon absorbs heat from
the milk.
2. Name the mode of heat transfer in which the particles of a medium actually move to the source of heat.
3. During ventilation what is the direction of the convection current ?
4. Which device is used to measure temperature ?
5. What sets the convection current in water ?​

Answer 1

Answer:

The spoon is dipped in a hot fluid, in this case milk and heat from a fluid transfers through convection.

Thermodynamics dictates that heat energy flows from hot to cold and in this case it flows from milk to the outer surface of the spoon. This is via the process of convection, given that the milk is a fluid.

This heats up the outer surface of the spoon, which ultimately becomes hotter than the inner metal inside the spoon and hence heat is transferred from outer surface to the inner core of the spoon via conduction since internally the spoon is a solid object.

Answer 2

Answer:

1) Endothermic change

2)Exothermic change

4)Thermometer