A wave travelling from water to glass suffers a change in its speed at the common boundary. Which of the following properties explains this observation?

Which of the following concept is not an evidence of the particle nature of matter?

A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine

A diver is 5.2m below the surface of water of density 1000Kgm-3. If the atmospheric pressure is 1.02 x 105pa. Calculate the pressure on the diver [g = 10ms-2]

Which of the following statements about the mass and the weight of a body is not correct? its

The molecular structure of a liquid is such that

The diagram above represent displacement D, versus time, t graph of a progressive wave. Deduce the frequency of the wave

Calculate the change in volume when 90g of ice is completely melted. [density of water = 1g cm-3, density of ice = 0.9cm-3]

An object weighs 60.0N in air, 48.2N in a certain liquid X, and 44.9N in water, Calculate the relative density of X