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In the ENGR 10 lab (E391), there are 75 long light bulbs (P=100 W) and 6 regular bulbs (P=60 W). How much energy is consumed lighting the lab during the 3 lab periods (9hours). Calculate the amount of energy saved if all bulbs are replaced by CFL (spiral) bulbs (P=25W). Calculate the amount of natural gas (ft3) needed to provide the energy to keep the lights (long + regular) in the E391 lab on overnight for a month (10 hours per day for 30 days)? In other words, how much extra energy (in terms of cubic feet of natural gas) does the school have to purchase when we don't turn off the lights in a lab.
What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 515 turns, its secondary 8 turns, and the input voltage is 124 V, What is the power input
A heavy sled is being pulled by two people. The coefficient of static friction between the sled and the ground is %u03BCs = 0.579, find the minimum rope tension required to get the sled moving
A Tritium (3 1 H) nucleus with kinetic energy of 4.70 MeV is incident on a stationary target of phosphorus (30 15 P); Find the nuclear binding energy of the nucleus 32 16 S
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)
The frequency of light reaching Earth from a particular galaxy is 8% lower than the frequency the light had when it was emitted. What is the speed of this galaxy relative to the Earth
A hiker, who weighs 919 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4410 N, and rests on two concrete supports, one on each end. He stops 1/3 of the way along the bridge.
The total electric field consists of the vector sum of two parts, Find the magnitude and direction of the total field, Specify the directional angle relative to the x axis
A kid slides down from the top of a 3m high frictionless slide. When he reaches the bottom of the slide, he travels over a 2m long carpet with a 0.20 coefficient of kinetic friction, What height does he return to on the slide
A guitar string is 90.0 cm long and has a mass of 3.27g . From the bridge to the support post (=?) is 60.0 cm and the string is under a tension of 514 N
What is the linear speed of Saturn in its orbit about the sun? Give your answer in meters per second
A mass of 2.80 kg is attached to a single spring such that the maximum velocity of the oscillation is 2.47 m/s and period is 1.82 seconds. What is the amplitude of the oscillation
Two parallel wires of length 18 m are separated by a distance of a = 0.13 cm. The first carries a current of I1 = 5 A, What is the magnetic force on each wire
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