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Most of the blackholes observed by astronomers have masses equal to a few solar masses (the result of the death of a high mass star) or have masses equal to several million solar masses (found at the core of most galaxies). Recently, a third category of blackhole has been observed with a mass between these two extremes. Calculate the Schwarzschild radius of a blackhole that has a total mass equal to 125 solar masses.
The focal length of the human eye is approximately 1.7 cm. What is the f-number for the human eye in bright light, when the pupil diameter is 3.0mm
An electric utility company supplies a customer's house from the main power lines (115V) with two copper wires, Calculate the power lost in the copper wires
During an action potential, Na+ ions move into the cell at a rate of about 3×10^?7mol/m2?s. How much power must be produced by the "active Na+ pumping" system
A point charge of +6.3? C is located 0.31 m from a second point charge of -4.8? C. What is the absolute magnitude of the force on each charge?
A circular disk of mass 10.0 kg and radius 0.500 m rotates at 30.0 revolutions per second on a vertical axle, What is the final angular velocity of the combination of disks
Both teenagers pull with a force of 55 at an angle of 35 relative to the forward direction, that is the direction of motion. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magn..
A crate of weight W=550 lb has been attached to a pickup truck by a rope whose tensile strength is T_max=350 lb. determine the maximum acceleration of the truck
A light bulb is wired in series with a 131-? resistor, and they are connected across a 120-V source. What are the two possible resistances of the light bulb
A convex mirror has a focal length of -20 cm. What is the position of the resulting image in cm if the image is upright and one-fourth the object size
The coil is flipped so its plane is vertical to the magnetic field in 0.050 s. What is the magnitude of the average induced emf.
A sinusoidal voltage %u0394v = (75 V) sin (180t) is applied to a series RLC circuit with L = 20 mH, C = 155 %u03BCF, and R = 30 %u03A9. What is the maximum current in the circuit
A 63.00 kg person on skis starts from rest down a hill sloped at 33° from the horizontal. The coefficient of friction between the skis and the snow is 0.190.
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