Two bowling balls are rolling towards each other. The first has a mass of 5 kg and is rolling with a speed of 4 m/s to the right. The seconds has a mass of 6 kg and is rolling with a speed of 7 m/s to the left. After the collision, the first bowling ball rolls away with a speed of 5 m/s to the left. How fast is the second ball rolling after the collision? * a) 0.5 m/s
b) 7.5 m/s
c) 6.2 m/s
d) 0.9 m/s

Why do electron microscopes have higher resolving power than light microscopes?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

The inner planets or call terrestrial because they