An object of mass 0.5 kg is transported to the surface of planet x where the object's weight is
measured to be 20 n. the radius of the planet is 4 x 105 m. what free fall acceleration will the 1.0
kg object experience when at the surface of planet x?

A10.0 kg cart and a 15kg cart are locked together with a compressed spring between them. they are then released so that the spring pushes the two carts apart. the 10.0 kg cart is moving at 4.5 m/s afterward. how fast is the 15kg cart moving? 3.0 m/s 2.0 m/s 4.5 m/s 5.0 m/s

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

The softest and hardest minerals are: softest hardest