22 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? *
(1 Point)
0.5 m/s
7.5 m/s
6.2 m/s
O 0.9 m/s

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

Sasha has just gotten a new job in a nearby city. after comparison shopping, she found that renting a nice two-bedroom apartment would cost around $800 per month. her utilities would cost about $150 per month. sasha has enough money saved for a down payment, and she found that she can buy a three-bedroom house or condo with a mortgage payment of $1,000 per month, including taxes and homeowner's insurance. her utilities would cost about $200 per month. what is the advantage of buying the house over renting the apartment?