Bob studies for a test and jackie does not study. after the test, they compare their scores. what's the independent variable?

A pulley is used to lift a heavy mass from the floor to a platform. The IMA of the system is 5 and the AMA is 2.5. What is the efficiency of the system?

A small 32-kilogram canoe broke free of its dock and is now floating downriver at a speed of 2.5 m/s. What is the canoe's momentum? Show your work.

A ball on an extremely low-friction, tilted surface will slide downhill without rotating. If the surface is rough, however, the ball will roll. Explain.

What is impossible for a machine to do? A) do a greater amount of work than the amount of work done on the machine B) apply a force in a direction that is different than the direction of the force applied to the machine C) move an object a greater

Consider a situation where the acceleration of an object is always directed perpendicular to its velocity. This means that (A) the object is increasing speed. (B) the object is decreasing speed. (C) the object is not moving.

The circulatory system keeps the body and its tissues continuously oxygenated. It does this by having A) veins to carry both oxygenated blood to the tissues and deoxygenated blood to the lungs.

What is the "atomic mass" of an atom?

What type of energy comes from the food that we eat?

Which of the following are vector quantities? check all that apply. a. time b. displacement c. force d. mass

Imagine you are on a bus with a helium balloon tied on a string tied to the seat in front of you. the bus stops short to avoid running over a rabbit and you are thrown forward. what happens to the balloon in relation to the bus? 1. the balloon pops.