What is the ratio of the sun’s gravitational pull on mercury to the sun’s gravitational pull on the earth?
a. the radius of the orbit of mercury is rm= 5.79× 1010m and its mass is mm= 3.30× 1023kg.
b. the radius of the orbit of earth is re=1.50× 1011m and its mass is me=5.97×1024kg.

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Energy flows from the producer level to the level. is called

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_