For a satellite to orbit Earth at a constant distance, its centripetal acceleration must be equal to Earth's gravitational acceleration. If a satellite is to orbit with
a constant circular radius of 9,500,000 m, what is the approximate required
velocity of the satellite? (Recall that Earth has a mass of 5.97 x 1024 kg and G
= 6.67 x 10-11 N·m2/kg?)
A. 6178 m/s
B. 6892 m/s
C. 7128 m/s
D. 6474 m/s

The key to stability is feedback between the reservoir and the fluxes into and/or out of the reservoir. assume that the rate of outflow from a reservoir depends on the size of the reservoir according to the following relationship: outflow rate= k x (size of reservoir), where k is a constant. a reservoir of water has a volume of 5000 liters, and the rate of outflow at steady state is 25 liters per minute. what is k? (give both the numerical value and its units.) what is the residence time? what is the relationship between k and the residence time?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Work = force × a. work b. energy c. distance d. momentum