Determine the phase constant ϕ (−π≤ϕ≤π) in x=Acos(ωt+ϕ) if, at t=0, the oscillating mass is at x=−A.
Express your answer in terms of the appropriate constants. If there is more than one answer, separate them by a comma.
Determine the phase constant ϕ (−π≤ϕ≤π) in x=Acos(ωt+ϕ) if, at t=0, the oscillating mass is at x=0.
Express your answer in terms of the appropriate constants. If there is more than one answer, separate them by a comma.

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

The two metal spheres in the figure are connected by a metal wire with w switch in the middle. initially the switch is open. sphere 1, with the larger radius, i'd given a positive charge. sphere 2, with the smaller radius, is neutral. then the switch is closed. afterward, sphere 1 has charge q1, is at potential v1 and the electric field strength at its surface is e1. the values for sphere 2 are q2, v2, and e2. a. is v1 < ,> , or = to v2? explain. b. is q2 < , > , or = explain? c. is e1 < ,> ,or = to e2? explain?

Aweather balloon has a volume of 52.5 liters at a temperature of 252 k. the balloon is released and rises to an altitude where the temperature is 295 k. how does this temperature change affect the gas particle motion?