The mass per unit volume of a substance is called density. (Density = mass/volume). Arrange the following in order of increasing density- air, exhaust from chimneys, honey, water, chalk,cotton and iron.

The volume of 50 g of a substance is 20 cm^3 . If the density of water is 1 g cm^-3 , will the substance float or sink?

The volume of a 500 g sealed packet is 350 cm^3 . Will the packet float or sink in water if the density of water is 1g cm^-3 ? What will be the mass of the water displaced by this packet ?

The unit of length convenient on the nuclear scale is a fermi : 1 f = 10^(-15) m. Nuclear sizes obey roughly the following empirical relation : r = r_0A^(1/3) where r is the radius of the nucleus, A its mass number, and r_0 is a constant equal to about, 1.2 f. Show that the rule implies that nuclear mass density is nearly constant for different nuclei. Estimate the mass density of sodium nucleus. Compare it with the average mass density of a sodium atom obtained in Exercise. 2.27.

The measured mass and volume of a body are 22.42 g and 4.7 cm ^3 the possible errors in measuements of mass and volume are respectively 0.01 g and 0.1 cm ^3 The maximum error in density is about

The densities of two substance are 2:3 and their specific heats are 0.12 and 0.09 respectively.compare their capacities per unit volume.

State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.

Compute the bulk -modulus of water from the following data: Initial volume = 100.0 litre, Pressure increase = 100.0 atm (1 atm = 1.013 xx 10^5 Pa) , Final volume = 100.5 litre. Compare the bulk modulus of water with that of air (at constant temperature). Explain in simple terms why the ratio is so large.

Calculate the value of Avogardo Constant from the following data. Density of NaCl = 2.165 gcm^-3 , distance bet^n Na^+ and Cl^- in NaCl = 281 pm (molar mass of NaCl = 58.5 gmol^-1)