In the vector sum a + b-c. vector aä has a magnitude of 19.9 and is directed at 21.8°counterclockwise from the positive x-direction, and vector c has a magnitude of 12.8 and is directed at 25.8°counterclockwise from the negative x-direction. what is direction of vector b. state your answer as a positive angle counterclockwise from the positive x-direction.

What are the factors that affect the resistance of a wire?

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere