A body of mass 3.5 kg displaces 1000 cm³ of water when fully immersed inside it. Calculate (i) the volume of body, (ii) the upthrust on body and (iii) the apparent weight of body in water.

The effect of temperature on density is that it :

1. decreases with an increase in temperature
2. increases with an increase in temperature
3. first decreases then increases with a decrease in temperature
4. is not affected by temperature

The mass of 1 cm³ of iron is 7.8 g, its density in S.I. unit is :

1. 7.8 kg/cm³
2. 7.8 g cm^-3
3. 7800 g/cm³
4. 7800 kg/m³

The density of water is maximum at …………… °C and is …………… kg/m³

1. 0, 1
2. 0, 1000
3. 4, 1
4. 4, 1000