Charge q1q1 is distance rr from a positive point charge QQ. Charge q2=q1/3q2=q1/3 is distance 2r2r from QQ. What is the ratio U1/U2U1/U2 of their potential energies due to their interactions with QQ?

Achild throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. the ball leaves her hand 1.00 m above the ground. how long is the ball in flight before it hits the ground?

Which feature of a heating curve indicates a change ofn state

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.