1. A female skater with mass 45 kg and velocity 7 m/s leaps into her partner's arms. If her partner has a mass of 60 kg and a forward velocity of 1.5 m/s, how fast are the two of them going after he catches her?

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

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.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above