one end of a horizontal spring(k=80N/m)is held fixed while an external force is applied to the free end, stretching it slowly from×1=o to ×2=4cm. what is work done by the applied force on the spring​

What happens to light waves from a star as the star moves away from earth?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

The necleus of an atom is made up of what subatomic particles?