New e-bike (electric assist bicycle). i prop it up so that the back wheel can spin freely (its not touching the ground). i give it a push and watch it spin. then, at time t=0, when its angular velocity is 17.0 rad/s , i turn on the electric motor so that the wheel has a constant angular acceleration of 27.0 rad/s2 . then at time t = 2.40 s i turn the motor off. from then on, the wheel turns through an angle of 435 rad as it gradually slows to a stop, at constant angular deceleration.

The mass of a muon is 207 times the electron mass; the average lifetime of muons at rest is 2.21 μs. in a certain experiment, muons moving through a laboratory are measured to have an average lifetime of 7.04 μs. for the moving muons, what are (a) β (b) k, and (c) p? the rest energy of the electron is 0.511 mev.

When you turn on a battery-operated device, an electrical circuit is

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)