Fig. 2.6 shows the particles of the air trapped inside a large balloon. The particles are far apart and spread out to fill the whole space. Why does this ga...

Fig. 1.1 shows how the displacement of the air particles varies with distance for a sound wave in air at one instant. What is the wavelength of this sound wave?

Fig. 1 shows a nut being loosened with a spanner. To turn the nut using a smaller force, what should you do?

When a block of metal is heated but does not change state, the average kinetic energy of its particles increases. This is measured as an increase in the block

Green light has a frequency of 6.0 × 1014 Hz. Using a speed of 3.0 × 108 m/s, what is its wavelength?

An object is dropped and falls freely near the surface of the Earth. What is the approximate value of the acceleration of free fall?

A manometer contains water of density 1000 kg/m3. The level on the gas side is 20 cm (0.20 m) lower than on the open side. Using g = 10 N/kg, by how much doe...

Fig. 1.1 shows a glass greenhouse in sunlight. Why does the air inside a greenhouse become warmer than the air outside?

Oil of density 0.9 g/cm³ is poured onto water of density 1.0 g/cm³. Where does the oil end up?