Explain the differences between heat and temperature.

5

(a)

Explain the reason for the following statement, "When heat is applied at the bottom of the water vessel, then it gets heated more quickly than when it is heated at the top."

5

(a)

Prove with the help of an experiment that heat radiation can travel through vacuum.

5

(a)

On last Monday, Pankaj was dealing immense cough and cold. Besides this, he was suffering from a great headache. So, he decided to take a leave on that day so that he could take some rest at his home. After one hour he thought to check his fever through a clinical thermometer, so before using it, he washed it and started shaking it very fastly in his hand, so that the mercury level of thermometer gets reduced. At the same time, his elder brother Vishwas scold him and suggested him to shake thet hermometer slowly.
(a) State some precautionary measures while checking the fever through a clinical thermometer.
(b) Mention the values showed by the elder brother of Pankaj ( i.e. Vishwas).

5

(a)

Last Sunday, Pooja on her week off entered in her kitchen to cook rice for her family in lunch time. The moment she put fry pan on the gas stove and lighted it through the matchstick, all of sudden her 5 years small daughter entered into the kitchen and tends to touch the hot fry pan. At the same time, Pooja saw her and pushed her away from the hot fry pan. In this way, she saved her child.
(a) Explain why do the fry pan are provided with the plastic handles?
(b) Mention the values represented by Pooja here towards her 5 years small daughter.

5

(a)

Describe in detail about the occurrence of oceanic currents.

5

(a)

Explain the sea breeze and land breeze.

5

(a)

Write a short note on radiation.

5

(a)

Explain the working of a thermo flask.

5

(a)

What are conductors of heat and insulators? Discuss their practical applications.

5

(a)