assume that the hubble constant is 72 km/s/mpc. if a galaxy is 10mpc away, how fast is it moving away from us?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

Simple machines can a. increase force only b. decrease force only c. increase or decrease force