C: 12 kHz
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Below are four statements about the uses of electromagnetic radiation. Gamma rays are used in medical treatment. Infr…
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?
A small emergency generator supplies 432 000 000 J of electrical energy in twenty-four hours. What is the average pow…
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…