Physics, 21.09.2019 00:20, jennycrapson
(this is a non-relativistic warm-up problem, to get you to think about reference frames.) a girl throws a baseball upwards at time t=0. she catches it at exactly t=2.0 seconds. a) calculate the position of the ball as a function of time (0
Answers: 3
Physics, 21.06.2019 23:00, hunterdylan01
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
Answers: 1
Physics, 22.06.2019 16:50, Walkman2092
Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.
Answers: 2
(this is a non-relativistic warm-up problem, to get you to think about reference frames.) a girl thr...
Mathematics, 21.01.2020 01:31
Computers and Technology, 21.01.2020 01:31