True or False: Unlike a fixed pulley, a moveable pulley multiplies the input force

Caleb is swinging Rachel in a circle with the Centripetal force of 533N. If the radius of the circle is 0.75m and Rachel has a mass of 16.4kg, how fast is Rachel moving? Round to the nearest tenth. Answer: 4.9 m/s Why? I just took the test; )

1) Air modeled as an ideal gas enters a well-insulated diffuser operating at steady state at 270 K with a velocity of 180 m/s and exits with a velocity of 48.4 m/s. For negligible potential energy effects, determine the exit temperature, in K.

Block B has mass 4.00 kg and sits at rest on a horizontal, frictionless surface. Block A has mass 2.00 kg and sits at rest on top of block B. The coefficient of static friction between the two blocks is 0.400.

Based on the periodic table shown above, elements in which of the following groups are the poorest conductors of electricity?

A molecule that speed up a reaction

Uranus has more than 14 times as much mass as earth, yet the gravitational force is less. how can that be?

What is velocity-time graph?

Whitch tool could be used to mesure the mass of. a package being mailed

Most of an atom is empty space. a. True b. False

Two ice skaters, Skater X and Skater Y, are at rest on a horizontal surface made of ice. The friction between the ice and the skaters is negligible.