An 80-kg astronaut carrying a 20-kg tool kit is drifting toward the space station at 2 m/s. If she throws the tool kit towards the space station at a
speed of 6 m/s, what is her final velocity (speed and direction)?

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?