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A heat engine operates among 40°C and 380°C. Being a real engine, its efficiency is only 60 percent of that theoretically possible for a Carnot engine at these temperatures. If it absorbs heat at a rate of 60 kW, at what rate does it exhaust heat?
if the resistance in a series RLC circuit remains the same but the capacitance and inductance are doubled, how will the resonant frequencey of the circuit change
In the Challenger Deep of the Marianas Trench, the depth of seawater is 10.9 km and the pressure is 1.16 x 10^8Pa (about 1.15 x 10^3 atm). What is the density of seawater at this depth
Two neutrons are in an infinite square well with L = 2.0 fm. What is the minimum total energy that the system can have? ( Neutrons, like electrons have antisymmetric wave functions ignore spin).
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.744 rev/s. find the initial and final kinetic energies for this system
a 5.0 kg crate is transferred to a lower level by means of an 8 m long frictionless slide. the height of the top end
In a lab, you have a sample of oxygen gas with a volume of 1000cm 3(1.00L) at a temperature of 40.0oC and a pressure of 101 kPa. The gas is allowed to expand until its volume is 1500 cm3(1.50L) and its pressure is 106kPa.
A circular coil (500 turns, radius=.195m) is rotating in a uniform magnetic field. At t=0 s. Find the magnitude of the magnetic field at the location of the coil
A flat sheet of ice (n = 1.309) has a thickness of 1.6cm. It is on top of a flat sheet of crystalline quartz (n = 1.544) that has a thickness of 0.86cm. Light strikes the ice perpendicularly and travels through it and then through the quartz. In t..
A small statue has a height of 3.8 cm and is placed in front of a concave mirror. evaluate the focal length of the mirror
Find the de Broglie wavelength of an oxygen molecule of average kinetic energy in air at a temperature of 194.0 K
there is a pipe that is 120 inches in length and 12 inches in diameter and with a pressure of 10 psi air is pushed
A 755 gram grinding wheel 25.5 cmin diameter is in the shape of a uniform solid disk. (We can ignore the small hole at the center.), What torque does friction exert while this wheel is slowing down
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