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A reversible engine takes in 555 joules per second and exhausts 482 watts. how much power does it produce? what is its efficiency? if operated in reverse as a refrigerator,what would be its COP?
A 0.740 m long brass pendulum experiences a 20.0°C temperature increase, Find the ratio of the change in period to the original period, What is the change in the period
A team of tornado-chasing meteorology graduate students is out in search of tornados. What frequency of sound do the students hear
1. How much charge has been transferred from the negative to the positive terminal? Express your answer using two significant figures. 2.How much work has been done on the charges that passed through the battery? Express your answer using two sign..
an electric current of 1.00 A is flowing through a copper filament diameter 1.00 mm, calculate the average electron velocity v and the ?- factor, the positive and negative charge densities in the S' frame
A block weighing 60.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 44.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the pla..
A small helium-neon laser emits red visible light with a power of 3.2 mW in a beam with a diameter of 2.5 mm. what is the total energy contained in a 1.00 m length of the beam
A car travelling at 25.0 m/s runs out of gas while travelling up a 33.0 degree slope. How far up the hill would it coast before starting to roll back down.
Suppose you are myopic (nearsighted). You can clearly focus on objects that are as far away as 50.2 cm away. What would be the refractive power (in diopters - do not enter units) for your prescription
A cylindrical container 1.60 {rm m} tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water.
What is the difference between mass and weight? On earth, what is the weight of a 1 kg mass?
Four charges are located in the x-y plane as follows: q@(0,0); 3q @ (a,0); 2q @ (0,a) and -4q @ (a,a). What is the electric force at the center of this distribution
A proton that has a mass m and is moving at 390 m/s in the + direction undergoes a head-on elastic collision with a stationary oxygen nucleus of mass 16m
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