What does a machine change to make work easier?

Why is a wedge one of the least efficient simple machines

A cylindrical specimen of brass that has a diam - eter of 20 mm, a tensile modulus of 110 GPa, and a Poisson's ratio of 0.35 is pulled in tension with force of 40,000 N.

Technician A says that the pressure differential switch may need to be re-centered after bleeding the brakes. Technician B says that there are several types of pressure differential switches, and each requires a different method of re-centering.

If the period of a pendulum is 2.0 seconds and the acceleration due to gravity is 9.8 meters/second2, what is the length of the cord on the pendulum? 1.0 meters 0.67 meters 1.3 meters 3.5 meters

What would happen if we used up all the coal on Earth? A. We would make more in a coal factory. B. More coal would quickly form underneath the Earth's surface C. It would take millions of years to replace.

What does a map scale 1:25,000 mean

Two hikers are 14 miles apart and walking toward each other. They meet in 2 hours. Find the rate of each hiker if one hiker walks 2.8 mph faster than the other.

Which major cities in the u. s. are located in earthquake zones?

Digitized information can be used by computers true or false

Standing on a frictionless surface (like a sheet of ice), two boys, one strong and one weak, are attempting to break a string in half by pulling on its opposite ends.