Three students push a piano on wheels with forces of 130 N to the right, 200 N to the left, and 70 N to the right. Calculate the net force AND use Newton’s First Law of motion to describe the motion of the piano with all three students pushing on it.

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Need people build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment. (5 points) worth 20 points