An object's velocity will not change unless it is acted on by a (n)

What was the basis of the earliest explanations for the cause of abnormal behavior?

who described atoms as having a positive nucleus with electrons that have different energies at different distances from the nucleus.

2. Harry was having a Quidditch meeting with the Gyrffindor team and they were figuring out what would increase the acceleration of the quidditch ball in the next match.

What is the distance between two equivalent parts of a wave called?

How can velocity change even if speed stays the same

Suppose gene A on the left chromosome is damaged and no longer functions. what form of the trait would show? Why?

I'm completely lost in physics, the Kinematics and dynamics units ... My exam is coming up ... If a biker travelling at 6.4m/s sees biker B 34m ahead on the road travelling 4.7m/s. How far will biker B get before biker A catches him?

When scientists record the volume of a gas, why do they also record the temperature and the pressure

Why is velocity most important in space launch?

A person walks up a stalled escalator in 25 s. When standing on the same escalator, now moving, she is carried up in 16 s. How much time in seconds would it take her to walk up the moving escalator?