Laws of Motion — Physics STD 11 Science — Question

During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000Pa. At what height must the blood container be placed so that blood may just enter the vein? [Use the density of whole blood from Table 10.1].

Comment on the following statement: the temperature of all the molecules in a sample of a gas is the same.

Does a solid also have two kinds of molar heat capacities C_P and C_v? If yes, do we have C_P > C_v? Is C_P - C_v = R?

Which is more elastic: water or air? Why?

Is the value of temperature coefficient of expansion always positive?

Show graphically the temperature variation with time associated with a cooling hot body.

1kg of ice at 0°C is mixed with 1kg of steam at 100°C. What will be the composition of the system when thermal equilibrium is reached? Latent heat of fusion of ice = 3.36 × 10³ J kg^-1 and latent heat of vaporization of water = 2.26 × 10⁶ J kg^-1.

Why do two layers of a cloth of equal thickness provide warmer covering than a single layer of cloth of double the thickness?

Energy possessed by a body by virtue of its position or configuration is known as ­________.