Flywheels are large, massive wheels used to store energy. they can be spun up slowly, then the wheels energy can be released quickly to accomplish a task that demands high power. an industrial flywheel has a 1.5 m diameter and a mass of 250 kg.
1. a motor spins up the flywheel with a constant torque of 50 n*m. how long does it take the flywheel to reach top angular speed of 1200 rpm
2. how much energy is stored in the flywheel?

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

What is the coefficient of kinetic friction μk between the block and the tabletop?