1. A 50 kilogram person carries a 20 newton can to the top of a
3.0 meter high ladder and then drops it to the floor.
Calculate the potential energy of the can when it is
at the top of the ladder.
a.
[801)
b. Determine the kinetic energy of the can when it is
1.0 meter above the floor.

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

The energy produced as a result of this flow of electrons from atom to atom is called