Physics, 18.03.2020 22:16 dhananjaynagarkar
An ac generator operates at a rotational frequency of 60 Hz and produces a maximum emf of 100 V. Assume that its output at is zero. What is the instantaneous emf (a) at ? (b) at ? (c) at t? (d) How much time elapses between successive 0-volt outputs? (e) What maximum emf would this generator produce if it were operated, instead, at 120 Hz?
Answers: 3
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Ajogger accelerates from rest to 4.86 m/s in 2.43 s. a car accelerates from 20.6 to 32.7 m/s also in 2.43 s. (a) find the magnitude of the acceleration of the jogger. (b) determine the magnitude of the acceleration of the car. (c) how much further does the car travel than the jogger during the 2.43 s?
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Physics, 21.06.2019 18:00
Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.
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Physics, 21.06.2019 23:10
A248-g piece of copper is dropped into 390 ml of water at 22.6 Β°c. the final temperature of the water was measured as 39.9 Β°c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m
Answers: 1
Physics, 22.06.2019 18:20
An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped
Answers: 2
An ac generator operates at a rotational frequency of 60 Hz and produces a maximum emf of 100 V. Ass...
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