Discuss a use and a harmful effect for three parts of the electromagnetic spectrum
Gamma rays can be used to sterilise medical instruments, however, they can cause cancer.Ultraviolet waves can be used for security on bank notes, however, they can cause sunburn and blindness.Microwaves can be used for heating up food, however, they can also heat up cells of the body which can be harmful.
OE
Related Physics GCSE answers
All answers ▸A mass of 2kg is dropped from rest at a height of 10m. i) What is the initial GPE of the mass? ii) What is the final velocity of the mass when it hits the ground?
A force of 13.8 N was used to lift a mass 30 cm vertically through a liquid. Calculate the work done in lifting the mass, stating the correct units.
Describe (both quanititavely and qualitiatively) the energy changes of a ball of mass 0.5kg, dropped from a height of 10m and left to bounce. Make use of the law of conservation of energy.
Write the equations of motion for constant acceleration and describe each term involved. Explain how to apply these equations of motion to calculate the horizontal and vertical components of a projectile moving under the force of gravity only.