Which of the following is best described as an inclined plane twisted into a spiral?

A.

a pulley

B.

a screw

C.

a wheel and axle

D.

a wedge

When a rectangle is constructed in order to add perpendicular velocities, what part of the rectangle represents the resultant vector?

The series in the He spectrum that corresponds to the set of transitions where the electron falls from a higher level to the nf = 4 state is called the Pickering series, an important series in solar astronomy.

What is static and sliding friction

Instead of rolling down the ramp over the step, imagine the ball falls off the back of the ramp directly to the ground. What is the amount of potential energy remaining after the ball lands on the ground?

What is the difference between inversion and eversion?

Which is a chemical change

A 20-N falling object encounters 4 N of air resistance. The magnitude of the net force on the object is?

What is the electrical power when the current is 25 amps and the voltage is 10 volts?

A cyclist rides her bike 7 mi east, and then 2 mi north before taking a break. Then she rides 5 mi east and then 3 mi north. What are the magnitude and direction of the cyclist's resultant displacement? magnitude: 13.0 mi; direction: 22.

What is the low end of the range of surface temperature of white stars