An 80 pound and 25 ft metal rod is propped up on a rough floor against a frictionless wall in a state of static equilibrium. The center of mass of the rod is located 10 ft up the rod from the bottom. With what magnitude of forces does the vertical wall push against the rod

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Determine the maximum r-value of the polar equation r =3+3 cos 0

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance