A hammer thrower builds up speed by spinning around the hammer (a heavy weight attached to the end of a wire) around in a circle. In which direction is the tension force acting on the heavy weight in this circular motion when its speed is increasing? (There may be more than one answer)

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up