A differential wheel and axle is used to lift a box of mass 400kg. The larger and Smaller radii of the beam
are 40cm and 30cm respectively. The length of the Crank
arm is 50cm. If the efficiency of the machine is 80%
Determine the motive force required to lift the load-
Velocity Ratio and Mechanical Advantage gained
lift​

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.)

When using the scientist method, which step comes last?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.