An elevator weighing 6,000 N moves up a distance of 10.0 meters in 30.0 seconds. a. How much work did the elevator's motor do? b. What was the power of the elevator's motor in watt and in horsepower?

What does the scale read when the elevator is climbing at a constant speed of 2.60 m/s?

The structure of a main sequence star like our sun can hold for a long time because A. Gravitation fore is counterbalanced by thermal expansion forces B. The immense volume of matter C. The rotational force

A spindle connects two wheels with fixed axles by a fan belt. If the effort wheel is larger than the resistance wheel, which axle will turn faster? A. the effort axle B. the resistance axle C. Both axles turn at the same rate. D.

Which of the following are three conditions that a scientific question must meet? A. Testable, supportable, repeatable. B. Supportable, repeatable, reliable C. Repeatable, reliable, important D. Testable, supportable, important

When the actual gas volume is greater than the volume predicted?

How do mountins building and volcanos relate to plate motion at convergent boundaries

A 20kg box is dropped 13m. how much work is done

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.