How long must a 400 W electrical engine work in order to produce 300 kJ of work? Explain

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

What property of an object determines its inertia?