Why do planets need to clear their orbit of debris

a truck uses a big engine for the acceleration while a car uses a smaller engine. the bicycle rider uses the force of his own. why does each vehicle require a different amount of force to accelerate?

You check the weather and find that the winds are coming from the west at 15 miles per hour this information describes the winds velocity, direction, acceleration or speed

Two alternate exterior angles are formed by a transversal through two parallel lines. If one of these alternate exterior angles has an angle measure of 5x-21, and the other angle has a measure of 2x+12, then what is the sum of their angle measures?

What is the primary determinant of the voltage developed by a battery?

Why do we need to learn about median and mode?

What factors affect the speed of a wave?

What direction does air resistance act on an object that is falling straight down

How are the relationships of elements in a group different from the relationships of elements in a period?

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?

What happens to the speed of the particles if the temperature is increased