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Two identical objects are placed in a room at 24° C. Object 1 has a temperature of 95° C and object 2 has a temperature of 35° C. What is the ratio of the net power emitted by object 1 to that radiated by object 2?
At a grocery store, a spring scale (spring constant 450 N/m) hangs near the produce section. What is the velocity of the pan immediately after the oranges land on the pan
a bulb emits light uniformly in all directions. the average emitted power is 150w. at a distance of 5m from the bulb
A 8.41 kg crate slides on a horizontal surface. The coefficient of kinetic friction between the surface and the crate is 0.496. what is the magnitude of the external force acting on the crate
An object is located 13.0 cm in front of a convex mirror, the image being 7.00 cm behind the mirror. How far in front of the mirror is the second object located
A 62-kg skier speeds down a trail. The surface is smooth and inclined at an angle of 22 with the horizontal. Determine the normal force acting on the skier
question fm radio stations use radio waves with frequencies from 88.0 to 108 mhz to broadcast their signals. assuming
A46dB sound wave strikes an eardrum whose area is4.0multiplied by10-5m2. How much energy is absorbed by the eardrum per second
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the mass of the star
The contacts worn by a farsighted person allow her to see objects clearly that are as close as 25.0 cm, even though her uncorrected near point is 84.0 cm from her eyes, How far away is the poster actually located
To get the top spinning, its string is pulled with a tension of 0.30. Explain how long does it take for the top to complete the first five revolutions? The string is long enough that it is wrapped around the top more than five turns.
A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer. how thick would you make the coating
Find the electric field inside a hollow plastic ball of radius R that has charge Q uniformly distributed on its outer surface
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