Object A is moving around another object B by the gravitational attraction. What is the acceleration of
object A, if the distance between the two objects is
5.24 x 10^3 m, and the mass of object B is 4.21 x 10^21
kg? Estimate G as 6.67 * 10^-11 N (m/kg)?

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up