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A heat engine does 158,000 J of work and gives out 189,000 J of heat to the cold temperature reservoir. The hot and cold temperatures the engine operates at are 382oC and -20oC.
What is the ideal (Carnot) efficiency?
What is the actual efficiency?
The intensity of the sound from a certain source is measured at two points along a line from the source. The points are separated by 17.2 m, the sound level is 70.00 dB at the first point and 56.13 dB at the second point.
A hypothetical NH molecule makes a rotational-level transition from l = 3 to l = 1 and gives off a photon of wavelength 1.780nm in doing so. What is the separation between the two atoms in this molecule if we model them as point masses?
An oil film with n = 1.45 floats on water. It is illuminated by white light from the sun at noon. If the film is 280 nm thick, find the wavelength and color of visible light that is most strongly reflected upward to an observer positioned above th..
find the equivalent capacitance of three capacitors c1 5.0 uf micro f c2 10 uf micro f and c3 12 uf micro f when
A resistor is connected to a battery with negligible internal resistance. by what factor does the power dissipated in the circuit change
A mass attached to the free end of a spring executes simpleharmonic motion according to the equation y = (0.36 m) sin (83 t), What is the period of vibration
A 90 g bead on a 60 cm long string is swung in a vertical circle about a point 200 cm above the floor
An electronic attachment for camera produces flash by usingenergy stored in 880&10-6 F of capacitor, Determine the value of resistance
A woman drives a car from one city to another with different constant speeds along the trip. She drives at a speed of 70.0 km/h for 15.0 min, 90.0 km/h for 20.0 min, What is the average speed for the entire trip
An elevator has mass 680kg , not including passengers. What is the maximum number of passengers that can ride in the elevator? Assume that an average passenger has mass 65.0 kg
Problem 1: Two point charges are placed 2.0 cm apart. They are fixed in place so that they do not move. a. A small ball of charge 3.0 x 10-9 C is placed at point A. the ball is small enough that it can be treated as a point charge.
Now suppose that the boundary occupies the x-y plane (z=0). In medium 1 vector A→ has components A→ = B→ =Ao(x^+z^) and k1=1. In medium 2, k2 =2. Find the components of A→ and B→f in medium 2.
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