Three identical satellites, x, y, and z are in outer space. the distance from satellite x to y is 450 km, the distance from y to z is 600 km, and the distance from satellite z to x is 450 km. between which satellites will the force of gravity be the greatest? a. between satellites y and z only. b. between satellites x and y, and satellites y and z. c. between satellites y and z, and satellites x and z. d. between satellites x and y and satellites z and x.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

What is the rate of change in a objects position?