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Q1. An electrical generating plant operates at the boiler temperature of and exhausts the unused heat into a nearby river at. What is the maximum theoretical effectiveness of the plant?
Q2. An elastic cord is 66 cm long when a weight of 66 N hangs from it but is 86 cm long when a weight of 76 N hangs from it. What is the "spring" constant k of the elastic cord?
An 8kg mass is observed traveling with a speed of .08*c. What is the relativisitic momentum
Suppose that the mass of the dishwater is large as much as necessary so that its temperature does not change appreciably.
The coil is flipped so its plane is vertical to the magnetic field in 0.050 s. What is the magnitude of the average induced emf.
The force stretching the D string on a certain guitar is 170 N. The string's linear mass density is 0.006 kg/m, What is the speed of the waves on the string
The mass of the nuclide 16/8 O is 15.994 915 u. Determine its average binding energy per nucleon
An object starts from rest at time t = 0.00 s and moves in the +x direction with constant acceleration. compute the acceleration of the object
What is the stopping distance of the car. What is the initial (horizontal) velocity of the ball.
A pipe carrying 20°C water has a diameter of 3.5 cm. Estimate the maximum flow speed if the flow must be streamline
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. Her near point is 22 cm from her eye. What is the refractive power of a magnifying glass that has an angular magnification of 6.32 when the image of the stamp is loca..
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
Three identical conducting spheres initially have following charges: sphere A, 5Q; sphere B, -7Q; and sphere C, 0. Spheres A and B is fixed in place, with a center-to-center separation that is much larger than the spheres.
An electric motor rotating a workshop grinding wheel at the rate of 106 rev/min is switched off. Assume the wheel has a stable negative angular acceleration of magnitude 1.50 rad/s2.
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