A fulcrum moving a resistance of 200 g has a distance to the fulcrum of 20 cm, the effort mass of 50 g has a distance to the fulcrum of 80 cm. The resistance moves 10 cm, the effort moves 40 cm. Calculate the efficiency of the lever.

Suppose I create a two-slit interference pattern using light with some wavelength lambda and slits with some separation D.

The planet Pluto has 1/500 the mass and 1/15 the radius of Earth. What is the value of g on the surface of Pluto? (A) 0.3 m/s2 (B) 1.6 m/s2 (C) 2.4 m/s2 (D) 4.5 m/s2 (E) 7.1 m/s2

A woman exerts a horizontal force of 1 pounds on a box as she pushes it up a ramp that is 2 feet long and inclined at an angle of 30 degrees above the horizontal. Find the work done on the box in ft - lbs. ... ?

A wave has a wavelength of 3.0m and a frequency of 0.5Hz. Calculate its speed

Define newton's 3 laws of motion

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?

A skydiver with a mass of 60 kg jumps from an airplane. Five seconds after jumping the force of air resistance is 300 N. What is the acceleration of the sky diver, five seconds after jumping?

How many basic wave forms are there? A.) 1 B.) 2 C.) 3 D.) 4