Asolid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. when each has fallen 1 m they both have the same

a, speed.
b, momentum.
c, kinetic energy.
d, inertia.
e, change in potential energy.

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.

Dc versus ac problem. suppose your dc power supply is set to 15 v and the vertical setting on the oscilloscope is at 5 v/div. how many divisions will the trace deflect if you connect the output of the power supply to the scope with the a input switch set on dc? how many divisions if the switch is on ac?

When doing scientific research ,the sources used should be ?