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The Sun emits electromagnetic waves (including light) equally in all directions. The intensity of the waves at the Earth's upper atmosphere is 1.6 kW/m2. At what rate does the Sun emit electromagnetic waves? (In other words, what is the power output?)
A top spinning at 4.00 rev/s comes to a stop in 64.0 seconds. Assume that the top slows down at a constant rate. How many revolutions does it make before coming to a stop
A 840-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s, What is the average force exerted on the car
A flywheel having constant angular acceleration requires 4.40s to rotate through 169rad . Its angular velocity at the end of this time is 110rad/s. find the angular acceleration of the flywheel
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^?2cm, Find its speed (vfinal) when it strikes the anode
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
a heavy box of school books (mass is 50kg) was set down at rest on an inclined street (theta = 30 degrees). Draw a force Diagram of the box
Type your quCliff and Will are carrying a uniform 2.0m board of mass 71kg. Find the normal forces exerted by Cliff and Will
A father and a daughter balance a teeter totter
A massive pulley in the shape of a solid disk is mounted on an axle with negligible friction. What is the mass of the pulley
A prescription for a corrective lens calls for +1.50D. The lensmaker grinds the lens from a "blank" with n = 1.56 and a preformed convex front surface of radius of curvature of 40.0 cm. What should be the radius of curvature of the other surface?
Find the electric field at the position of the electron. What is the potential difference in volts between the plates.
a piano note is compared to a tuning fork vibrating at 440 Hz. Four beats per second are discerned by the piano tuner. What was the initial frequency of the piano wire
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