I attach a voltage source to a 45 mF capacitor until it is fully charged. I then take the voltage source away and discharge the capacitor through a 120 Ω resistor in a basic RC circuit. If the initial current through the circuit during discharge is 0.5 A, what voltage did I apply to the capacitor to charge it?

Which is not a step in the rock cycle?

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?