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A blackhole is an object so massive that not even light can escape, one way to define the size of a black hole is by the Schwarzschild Radius, which is the radius at which the escape velocity is equal to the speed of light. If we were to condense the Earth into a black hole, what would the size of this black hole be?
A 55.0 kg ice skater is moving at 4.00 m/s when she grabs theloose end on a rope, the opposite end of which is tied to a pole. Determine the force exerted by the horizontal rope on her arms
An insect that is 5.90 mm long is placed 11.5 cm from a converging lens with a focal length of 12.0 cm. The position of the image is 276 cm from the lens and the size of the image is 141.6 mm. What is the angular magnification if the lens is close to..
A symmetric double convex lens with a focal length of 25.0cm is to be made from glass with an index of refraction of 1.53. What should be the radius of curvature for each surface
You have a 1200W microwave. When you put a cup of water in for 8 minutes only half evaporates. How eficient is your microwave
A street lamp weighs 152N. It is supported equally by two wires that form the angle of 120° with each other. What is the tension of each of these wires.
A solid disk is rotating about an axis with uniform angular velocity. another disk, with the same moment of intertia about the rotation axis, how is the new angular velocity related to the old one
Estimate the force on a 145-gram baseball if it hits the bat at 50 miles per hour and stays in contact with the bat for 0.1 second
two parallel infinite nonconducting plates are 10.6 cm apart and have charge distributions of 2.5 microcm2 and -2.5
At the instant a traffic light turns green a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. Determine the speed the car when it passes the truck
a pelican flying along a horizontal path drops a fish from a height of 4.7 m. the fish travels 7.7 m horizontally
The absorber surface of a solar collector is made of aluminum coated with black chrome a s = 0.87 and e ir = 0.09). Solar radiation is incident on the surface at the rate of 600 W/m2. The air and the effective sky temperature are 25 and 15°C respe..
You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 1.96 N. What is the linear mass density of the string, including its uncertainty
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