Why are all machines not 100% efficient

A. Mass

B. Gravity

C. Friction

D. Distance

A pendulum swings in an arc in which each successive swing is 40% as long as the previous swing. if the first swing covers an arc 75 meters long, what is the total distance the pendulum will swing before coming to rest?

Is speed an increase in rate of which something moves

A water wave squeezing through a small hole is an example of

What word is used to describe an acid or base that can destroy body tissue, clothing, and many other?

How does the orientation of the Earth's axis relate to the position of the Sun in the sky?

A spring tide can occur at what day and month?

For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement

Electric force is blank proportional to the amount of charge and blank proportional to the square of the distance between the charges

What happens in the gray zone between solid and liquid?

Which statement describes Newton's law of universal gravitation? Mass has hittle effect on gravity between objects. Gravity pushes objects away from Earth's center, Gravity does not act between Earth and the moon.