ICSE Class 8 Physics — Important Questions

During the process of condensation of steam at 100°C, what happens to the temperature of the steam and the heat energy?

A student sprays perfume in one corner of a classroom. Within a short time, the smell is detected throughout the room. Which property of molecules does this activity primarily demonstrate?

Ice has a melting point of 0°C and its latent heat of fusion is 336 × 10³ J/kg. How much heat energy is required to melt 2 kg of ice at 0°C into water at 0°C?

The density of a substance is 13.6 g cm⁻³. Which of the following correctly states its density in SI units and its relative density?

A rectangular glass block is 40 cm long, 20 cm wide and 5 cm thick. Its mass is 8 kg. What is the density of glass in g cm⁻³?

A wooden block of mass 300 g and density 0.75 g cm⁻³ is placed in glycerine of density 1.26 g cm⁻³. Which statement correctly describes what happens?

A block exerts a thrust of 60 N on a surface of area 3 m². What is the pressure on the surface?

A sharp knife cuts vegetables more easily than a blunt knife. The correct reason is:

The SI unit of pressure, the pascal (Pa), is equivalent to which of the following?