John uses a lever to lift a load. The load weighs 480 N which is more than John can carry by himself. However, John can lift the lever with as little as 80 N. What is the mechanical advantage of the lever? A reminder that MA = force output/force input
A) 0.17 N
B) 17%
C) 6 N
D) 600 N

The air that we breath is made mostly of which gaseous molecule

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

Aracecar driver has to hold on tightly when going around a banked curve. approximately what is the centripetal force on a 2220.0 kg car going around a circle with a diameter of 190.0 meters at 25.0 m/s?