All substances have characteristic properties. if one of these properties can be observed without changing the identity of the substance, it must be a a. chemical property. b. physical property. c. biological property. d. universal property.

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?

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.