Model Set 2
Attempt all the questions.
SET ‘B’
Physics
1. (a) The body weighs more at pole than equator. Why? The mass of the planet is 6 x 1024 kg and its radius is 6400 km. What is the weight of 50kg mass standing on that planet? (G = 6.67x10 –11 Nm2/kg2)
[1+2+1=4]
(b) Nuclear Energy is also considered an alternative source of energy. Why? Show the complete thermonuclear reaction taking place on the surface of sun and write its two conditions. [1+2.5=3.5]
2. (a) Define Pascal’s law. If weight of a body in air is 20 N and in a liquid is 10N, find the weight of displaced liquid and mass of that liquid. [1+2.5=3.5]
(b) A Ship made of iron can easily float in water. Why? An ice block of dimension 60cm x 30cm x 20cm is placed in water. What is the height of ice above the surface of water if the density of ice and water is 0.9gm/cm3 and 1gm/cm3 respectively? [1+3=4]
3. (a) Define Specific Heat capacity. Write the SI unit of temperature. How much heat is required to raise the temperature of 10kg mass of a substance by 10°C when its specific heat capacity is 2100 J/kg°C? [1.5+2=3.5]