Q1.
all radio waves travel at 300 000 000 m/s in air
(1)
give the equation that links the frequency, speed and wavelength of a wave.
calculate the wavelength, in metres, of a radio wave which is broadcast at a frequency
of 909 khz,
wavelength =

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.