An Earth satellite has its apogee at 2,400 km above the surface of Earth and perigee at 900 km above the surface of Earth. At apogee its speed is 5,600 m/s. What is its speed at perigee (in m/s)

How much work would be needed to raise the payload from the surface of the moon (i.e., x = r) to an altitude of 5r miles above the surface of the moon (i.e., x = 6r)?

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?