Vector C has a magnitude of 25.8 m and points in the −‑ direction. Vectors A and B both have positive ‑ components, and make angles of α=41.4° and β=29.2° with the positive and negative - axis, respectively. If the vector sum A+B+C=0 , what are the magnitudes of A and B?

Avalue that describes how heavy an object is and is related to the force of gravity is

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?