What type of simple machine can be used to reduced the resistance force of friction?

Potassium Permanganate is used for purifying drinking water, because A. it is a sterilising agent B. it dissolves the impurities of water C. it is a reducing agent D. it is an oxidising agent

What sort of problem do you use acceleration due to gravity? What sort of problem do you not?

What do wind turbines, hydroelectric dams, and ethanol plants have in common

The force of gravity on a person or object at the surface of a planet is known as what? mass free fall weight terminal velocity

Two spaceships are approaching each other. (a) If the speed of each is 0.9c relative to Earth, what is the speed of one relative to the other?

Newton's Second law of Motion (F = ma) is one of the basis of forces and motion. How is it very similar to his First law and why is finding the acceleration of the system (the main reason we use it) so important to solving physics and real world

You find out that it takes 2 sec. for the swing to complete one cycle. what is the swing's period and frequency?

Can you chemical change or alter DNA

Give an example in which velocity is zero yet acceleration is not.

A 2,537-kg truck moving at 14 m/s strikes a car waiting at a traffic light, hooking bumpers. The two continue to move together at 8 m/s. What was the mass (in kg) of the struck car