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The Rumford Engineering company, a supplier of yours, has just announced that it is offering a new product line for closed electronic cabinet cooling.
It is a small refrigeration unit driven by a 0.250 hp electric motor that removes 500. W of heat from the cabinet. What is the coefficient of performance of this unit?
A locomotive of mass 5 metric tons (5000 kg) pulls a short train consisting of 4 coal cars, each of mass 1000kg. What is the tension in the coupling between the locomotive and the first coal car
a quarter-pound hamburger with all the fixings has a mass 210g . the food energy of the hamburger is 2.4mj. what is the
A 18.4 kg cart traveling at 5.63 m/s (this movement defines thepositive direction) has a head on perfectly inelastic collision with a 6.9 kg cart traveling at 7.06 m/s. How much kineticenergy is lost in the collision?
question1the starter motor of a car engine draws a current of 126 a from the battery. the copper wire to the motor is 6
the resistivity of a semi conductor can be modified by adding different amounts of impurities. a rod of semi conducting
A transformer is used by a European traveler while she is visiting the United States. find the rate at which heat is generated in the transformer itself
A flatbed truck going 100 km/h rounds a horizontal curve of 300 meter radius inwardly banked at 10 degree. Obtain the friction force F action on the crate
The legend that Benjamin Franklin flew a kite as a storm approached is only a legend - he was neither stupid nor suicidal. what is the current through the water layer
An infant's pulse rate is measured to be 154 ± 4 beats per minute. What is the percent uncertainty in this measurement? (Note that percent uncertainties should be reported to two significant figures.)
A 0.150kg toy is undergoing SHM on the end of a horizontalspring with a force constant 300 N/m. estimate the maximum speed attained by the object duringits motion
a ship uses a sonar system to detect underwater objects. the sonar system emits underwater sound waves and measures the
The hydrogen spectrum has a red line at 656 nm and a violet line at434 nm. What angular separation between two spectral lines obtained by a diffraction grating that has 4880lines/cm? (Suppose that the light is incident normally on the grating.)
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