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Two energy reservoirs are at 20 degrees Celsius and 827 degrees Celsius. A heat engine operating between these reservoirs has 40% of the maximum possible efficiency. How much energy does this engine extract from the hot reservoir to do 3500 J of work?
The medical profession divides the ultraviolet region of the electromagnetic spectrum into three bands: UVA (320-420 nm), UVB (290-320 nm), and UVC (100-290 nm). Find the frequency range associated with UVB radiation
The Hamiltonian of a system of two (spin-1/2) electrons H= ?1?z1+?2?z2 where ?z is the Pauli Matrix, ? is an energy parameter and our subscripts represent the two electrons 1 and 2. What is the basis where this Hamiltonian is diagonal?
A very long solenoid of circular cross section with radius r= 4.20cm has n= 90.0 turns/cm of wire. What is the magnitude of the force on the electron
1ml of distilled water is injected into a length of 3mm diametre tubing and sealed at the other end by folding over, Why doesn't water drain out when the tube is hung vertically
The planet Mars has a satellite, Phobos, which travels in an orbit of radius 9.378×106 m with a period of 0.32 days. Calculate the mass of Mars from this information
In a mass spectrometer, a singly charged ion having a particular velocity is selected by using a magnetic field of 0.10 T , What is the mass of the ion
if the sea level pressure of the atmosphere is 92.1 bars, and the density is 65.5 kg/m^3 what is the equilibrium temperature
What would be the nature and height of the image?
A strong man is compressing a lightweight spring between two weights. One weight has a mass of 2.3 kg, the other a mass of 5.3 kg . He is holding the weights stationary, What is the speed of the heavier weight
On average, each person in the industrialized world is responsible for the emission of 10,000 kg of carbon dioxide () every year. This includes that you generate directly, how long would each edge of the cube be
The electric field on the axis of a uniformly charged ring has magnitude 350kN/c at a point 6.0cm from the ring center. Find the rings charge in nC
A mass m = 6.3 kg hangs on the end of a massless rope L = 1.98 m long. The pendulum is held horizontal and released from rest. How fast is the mass moving at the bottom of its path
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