Question

1) State the laws of reflection
2) Differentiate between regular and diffused reflection
3) A pendulum oscillates 40 times in 4 seconds find its time period and frequency
4) Explain in what way noise pollution is harmful to human
5) Does pure water conduct electricity if not what can we do to make it conducting.
6) In case of fire before the fireman use the water hoses ,they shut off the main electrical supply for the area
explain why they do this.​

Answer 1

We cannot answer all of them in one question ! more place isn't available