What can lisa do to increase the strength of the electromagnet? she can use a nail with weaker magnetic properties. she can change the direction of the nail. she can move the wire loops closer together. she can reduce the number of wire loops.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same