Acart weighing 420n rests on a 23 degree incline. calculate the component of its weight that presses the cart to the hill

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?