An elevator car, with a mass of 450 kg is suspended by a single cable. at time = 0s, the elevator car is raised upward. the tension on the cable is constant at 5000n during the first 3 seconds of operation. determine the magnitude of the velocity of the elevator at time = 3 seconds.

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.