Due to thermal ecpansion with rise in temperature
(a) Metallic scale reading becomes lesser than true value
(b) A floating body sinks a little more
(c) The weight of a body in a liquid increases

Due to thermal expansion with rise in temperature (a) Metallic scale reading becomes lesser than true value (b) Pendulum clock goes fast ( c) A floating body sinks a little more (d) The weight of a body in a liquid increases

Statement I : A body floats in a liquid with a fraction n of its volume above the surface of the liquid. If the system is taken to a planet where the acceleration due to gravity is greater than that on earth, the fraction n will decrease. Statement II : For flotation, the weight of the body is equal to the weight of the liquid displaced.

Newton’s law of cooling says that the rate of cooling of a body is proportional to the temperature difference between the body and its surrounding when the difference in temperature is small. (a) Will it be reasonable to assume that the rate of heating of a body is proportional to temperature difference between the surrounding and the body (for small difference in temperature) when the body is placed in a surrounding having higher temperature than the body? (b) Assuming that our assumption made in (a) is correct estimate the time required for a cup of cold coffee to gain temperature from 10^(@)C to 15^(@)C when it is kept in a room having temperature 25^(@)C . It was observed that the temperature of the cup increases from 5^(@)C to 10^(@)C in 4 min

Regarding the surface tension property of liquids, the correct statements is/are a) surface tension decreases with increase of temperature b) at 20^@ C the surface tension of ethanol is greater than that of water c) the dimensions of surface tension is SI units is Nm^(-1) d) in the fine polishing of the glass, the edges become smooth due to surface tension

True statements among the following are (A) Number of wave generated by the electrons in the 5th orbit is five (B) As the temperature increases maximum intensity of radiation emitted by the black body shifts towards lower wavelength side (C) As the intensity of incident radiation increases kinetic energy of photo electrons increases

Give reasons for the following. (a) Liquids can be taken in an open container while gas requires a closed container. (b) Honey cannot be poured into another container as easily as water (c) Gases flow more than liquids. (d) As water is subjected to heating, its temperature increases and becomes constant at 100^(@)C even though water is still there in the container and the supply of heat is continued. (e) When a solid substance is subjected to heating, it dissappears without leaving any liquid.

State whether the following statements are true or false: (a) A falling stone also attracts the earth. (b) The force of gravitation between two objects depends on the nature of medium between them. The value of G on the moon is about one-sixth ((1)/(6)) of the value of G on the earth. (d) The acceleration due to gravity acting on a freely falling body is directly proportional to the mass or the body. The weight of an object on the earth is about one-sixth of its weight on the moon.

Whichof the following statements are correct ? (a) With rise in temperature, surface tension of a liquid increases. (b) The rise of a liquid in a capillary is due to the phenomenon of diffusion. (c ) The boiling point of water is lower is Shimla than in Jalandhar. (d) The viscosity of a liquid is generally more than that of a gas.