Describe how water may be treated before it is used by people?

P. S - This is a science question.

In the physics of trajectories, complimentary angles have the same range: for example, projectiles launched from 30 degrees and 60 degrees with the same initial speed will land at the same horizontal location.

How does a doppler radar work?

A sample of the inert gas krypton has its pressure tripled. if the original volume is 12 l, what is the final volume in l

Light from a 504-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 17°. What is the angle of reflection (in degrees) from the surface?

What. Is the acceleration of a racing car if it's speed is decreased uniformly from 66 m/sec to 44 m/sec over an 11 sec period

Is the reduction of copper from copper (ii) oxide by carbon exothermic or endothermic? what is the sign of the energy change?

True or false we have mucus that covers are stomach which prevents or stomach acid from digesting or stomach

a man applies a force of 100n to a rock for 60 seconds but the rock does not move what is the amount of work done by the man on the rock

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.

You are going to develop some photographic film that involves a chemical reaction between the developer, which you will mix yourself, and a chemical on the surface of the film.