1. When a particle moves in a circle with constant speed, its acceleration is

A) constantly increasing.

constant in direction.

C) zero.

D) constant in magnitude.

E) constant in magnitude and direction.

What characteristics do Neptune and Uranus have in common?

In 1975, nasa cooperated with what country to achieve the first international human space flight?

A train blows its whistle as it enters a 50 m long tunnel. What is the time delay heard by a person at the other end of the tunnel between the sound of the train's whistle through the rails and through the air?

What has a gravitational pull?

A box is being pulled by two ropes. Eduardo pulls to the left with a force of 500 N, and Clara pulls to the right with a force of 200 N. The box moves because of the two forces applied to it.

What can change scientific knowledge?

6. What is ductility?

During practice, a baseball player hits a very high fly ball, and then runs in a straight line and catches it. Which had the greatest displacement during the time period from the hitting of the ball to its catching

Why are glass fibers stronger than bulk glass?

1. A 2000kg truck at rest accelerates to 45m/s in 7 seconds. What is its change in kinetic energy?