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Question: The sun burns up 3.6 x 10^9 kg of matter each second. Using the formula E=mc^2, determine how much energy the sun releases each second. Show calculations.
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 56 dB by an observer 10 km away. What is the average power generated by the horn
A juggler throws a ball straight up into the air and it takes 4.20 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
A planar electromagnetic wave is propagating in the +x direction. What is the Poynting vector at the point P at that instant
q. a 0.500 rm kg glider on an air track is attached to the end of an ideal spring with force constant 459 rm nrm m it
A spherical metallic Christmas tree ornament has a diameter of 6.41 cm. If Saint Nicholas is by the fireplace, 1.37 m away, where will he see his reflection in the ornament
A man is to pull a 50 .0 kg crate across a level terrain with a force of 50.0 N. What is the coefficient of kinetic friction, if the work done by friction is - 4.30 x 102 J
A 1460-kg racecar is driving around a circular track of radius 161 m. What is the magnitude of the net force acting on the vehicle
q1. a dental bracket exerts the horizontal force of 80.0 n on a tooth at point b. what is the torque on the root of
What about the scheme itself: is it a good idea? Should you buy stock in this company?
Hydraulic stamping machines exert tremendous forces on a sheetof metal to form it into the desired shape. How large a force does the press exert on the sheet being formed
If a piccolo has a length of 34 cm, what is the lowest frequency that it can play? Assume the piccolo is like a pipe that is open at both ends
A rotating water pump works by taking water in at one side of the rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120m starts from rest and accelerates at 30.50 rad/s2.
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