A120-v motor has mechanical power output of 2.10 hp. it is 80.0% efficient in convertingpower that it takes in by electrical transmission into mechanicalpower.
(a) find the current in the motor.
(b) find the energy delivered to the motor by electricaltransmission in 2.50 h of operation.
(c) if the electric company charges $0.160/kwh, what does it costto run the motor for 2.50 h?
Answers: 1
Physics, 22.06.2019 11:00, kylieweeks052704
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
Answers: 1
Physics, 22.06.2019 11:30, azduce
(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?
Answers: 3
Physics, 22.06.2019 13:30, kuddlebugsmommy
The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?
Answers: 1
A120-v motor has mechanical power output of 2.10 hp. it is 80.0% efficient in convertingpower that i...
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