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The displacement-distance and displacement-time graphs are for a water wave in a ripple tank. What is the speed of th…
Sound travels at different speeds in air, water and steel. For these materials, which row is correct?
The speed of radio waves is c. A radio station transmits waves with a wavelength λ. What is the frequency of the tran…
A 100 g mass is suspended from a spring next to a vertical metre rule. The top of the spring is level with the 0.0 cm…
A block of metal is taken from the Earth to the Moon. Which property of the block changes?
The diagram shows a mercury manometer connected to a gas container. The density of mercury is 13600 kg/m³. The gravit…