If a machine exerts a force of 250 N on an object and no work is done, what must have occurred?

List two ways that a plant can cross-pollinate

Why might people be able to walk barefoot on hot coals of wood without burning their feet?

How the properties of sound waves change as they spread out in a spherical pattern

A certain merry-go-round is accelerated uniformly from rest and attains an angular speed of 1.2 rad/s in the first 18 seconds. if the net applied torque is 1200 n · m, what is the moment of inertia of the merry-go-round?

What is the primary technique for determining the absolute age of a rock

Which type of radiation has the lowest penetrating ability?

For which one of the following situations will the path length equal the magnitude of the displacement? a A ball on the end of a string is moving in a vertical circle. b A toy train is traveling around a circular track.

A poem on the body system

How many stars, approximately, are in the solar system?

The ends of a magnet where the force is strongest are magnetic