Units, Dimensions and Measurement — JEE physics STD 12 Science — Question

Assertion : The internal energy of an isothermal process does not change.
Reason : The internal energy of a system depends only on pressure of the system.

Assertion : Temperatures near the sea coast are moderate.
Reason : Water has a high thermal conductivity.

Assertion : The stretching of a coil is determined by its shear modulus.
Reason : Shear modulus change only shape of a body keeping its dimensions unchanged.

Assertion : When height of a tube is less than liquid rise in the capillary tube, the liquid does not overflow.
Reason : Product of radius of meniscus and height of liquid in capillary tube always remains constant.

Assertion : The shape of an automobile is so designed that its front resembles the stream line pattern of the fluid through which it moves.
Reason : The resistance offered by the fluid is maximum.

Assertion : Bodies radiate heat at all temperatures.
Reason : Rate of radiation of heat is proportional to the fourth power of absolute temperature.

Assertion : 'Light year' and 'Wavelenght' both measure distance.
Reason : Both have dimensions of time. 

Assertion : A body cannot have energy without having momentum but it can have momentum without having energy.
Reason : Momentum and energy have same dimensions.

Assertion : A metal piece and a non-metal (stone) piece are dropped from the same height near earth's surface. Both will reach the earth's surface simultaneously.
Reason : There is no effect of earth's magnetic field on freely falling body.