An electron has 5.7 x 10-18 J of electric potential energy at position A from a positive point charge. If it is moved to position B where it has 7.7 X 10-18 J of potential energy, what is the voltage between positions A and B? Would it have to be moved towards or away from the positive point charge to gain this energy?

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this