A 200 kg crate is pulled along a level surface by an engine. the coefficient of friction between crate and surface is 0.4.

a. how much power must the engine deliver to move the crate at 5.0m/s.

b. how much work is done by the engine in 180s

How fast and in what direction must galaxy A be moving 17 an absorption Line found at 500 nm for a stationary galaxy 1s shifted to 400 nm for A? (b) How fast and in what direction is galaxy B moving if it shows the same line shifted to 550 nm?

A boat travels at 15 m/s in a direction 45 east of north for an hour The boat then turns and tra direction 5° north of east for an hour! What is the magnitude of the boat's resultant velocity? Round your answer to the nearest whol.

in order for combustion to occur what needs to happen

With which field of science is Albert Einstein associated? biology chemistry medecine physics

People remember most dreams that they experience

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

If a 1.50 kg mass revolves at the end of a string 0.50 m long, and its tangential speed is 6.0 m/s, calculate the centripetal force.

Balanced forces can change an object's direction. A. True B. False