A: cleaning jewellery
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A ripple tank is used to show wave behaviour. The dipper vibrates up and down at a constant frequency. What happens t…
A wave has a frequency of 10 kHz. Which pair of values of its speed and wavelength is possible?
Which wave property has the same value for all X-rays travelling in air?
The liquid in a puddle evaporates and this causes its temperature to change. How does the temperature of the liquid c…
When a refrigerator is switched on for the first time, the air surrounding the ice-box is cooled. What happens to the…
An ice-cube has a mass of 7.50 g. The ice-cube is at 0°C. Heat from the surroundings reaches the ice-cube at an avera…