1. An object accelerates from rest with a constant acceleration of 7.5 m/s2. How fast will it be traveling after it goes 21 m?

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?

2. which of the following does not affect the electrical resistance of a body? a. material composing the body b. bodies directly surrounding the body c. length of the body > d. temperature of the body

Plz explain what friction, corollas, and a low pressure gradient does to an air parcel. what is 1+1=