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A given star is a sphere with a radius of 5.81x108 m and an average surface temperature of 6970 K. Determine the amount by which the star's thermal radiation increases the entropy of the universe each second. Assume that the star is a perfect blackbody, and that the average temperature of the rest of the universe is 2.73 K. Do not consider thermal radiation absorbed by the star from the rest of the universe.
An automobile has aa vertical radio antenna 1.20 mlong. The automobile travels at 65.0 km/h on a horizontalroad where earths magnetic field is 50.0 uT directed toward thenorth, calcutate the magnitude of this induced emf
Consider an electron in the ground state of the hydrogen atom, separated from the proton by a distance of 0.0529 nm. Viewing the electron as a satellite orbiting the proton in the electrostatic potential, calculate the speed of the electron in its ..
An office window has dimensions 3.4 m by 1.7 m. As a result of the passage of a storm, the outside air pressure drops to 0.95 atm, but inside the pressure is held at 1.0 atm.
Extimate the thickness of a glass at a bright fringe and the Brewster's angle for light traveling from air to glass.
A charge q = 2.00 uC is placed at the origin in a region where there is already a uniform electric field E_vec = (100 N/C)i_hat. Calculate the flux of the net electric field through a Gaussian sphere of radius R = 10.0 cm centered at the origin.Is it..
A 5.00?F capacitor that is initially uncharged is connected in series with a 5.50k? resistor and an emf source with E= 145V negligible internal resistance, Just after the circuit is completed, what is the voltage drop across the capacitor
Charges q and Q are placed on the x axis at x = 0 and x = 2.0m, respectively. If q= -40 pC and Q =+30 pC, determine the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
A 32 -tall, 6.0 -diameter cylindrical beaker is filled to its brim with water. What is the downward force of the water
A bullet is moving at a speed of 367 m/s when it embeds into a lump of moist clay. The bullet penetrates for a distance of 0.0621 m. Determine the acceleration of the bullet while moving into the clay. (Assume a uniform acceleration.)
q1. two astronauts each having a mass of 95.0 kg are connected by a 10.0-m rope of negligible mass. they are isolated
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 24 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit the wall
An oak barrel with a lid of area 0.20 m2 is filled withwater. A long, thin tube of cross-sectional area 5.0 X10-5 m2 is inserted into a hole at the centerof the lid, and water is poured into the tube. When the waterreaches 12 m high, the barrel bu..
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