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Consider a pulsar, a collapsed star of extremely high density, with a mass M equal to that of the Sun (1.98 × 1030 kg), a radius R of only 17.7 km, and a rotational period T of 0.0642 s. By what percentage does the free-fall acceleration g differ from the gravitational acceleration ag at the equator of this spherical star?
a 150 Watt computer (computer plus flat panel monitor) is turned on 8.0 hours per day. if electricity costs $0.15/kWh, how much does it cost to run the computer annually
An ideal gas at 24.6°C and a pressure 1.60 105 Pa is in a container having a volume of 1.00 L. Determine the number of moles of gas in the container
The amount of internal enrgy needed to raise temperature of .25kg of water by .2 degreesCis 209.3J. How fast must a .25kg baseball travel in order for its kinetic energy to equal this internal energy.
A wire is formed into a circle having a diameter of 10.3 cm and is placed in a uniform magnetic field of 3.25 mT. The wire carries a current of 5.00 A. Find the maximum torque on the wire.
An electron moves into a uniform magnetic field B = 0.182mT with initial speed with v = 12000m/s, What is the radius of the helical motion
A physics professor, equipped with a rocket backpack, steps out of a helicopter at an altitude of 592 m with zero initial velocity. (Neglect air resistance.), What is the duration of her slowing-down period
As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air at a speed of 17.0 m/s. find the force he exerts on the ball to give it this upward speed
What is the electric potential at the surface of a gold atom’s nucleus, which is assumed to be spherical? The radius of a gold nucleus is 6.6*10^-15 meters and the atomic number of gold is 79.
By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, find the masses of pieces 1 and 2
A certain organ pipe, open at both ends, produces a fundamental frequency of 256 in air.If the pipe is filled with helium at the same temperature, what fundamental frequency will it generate ? Take the molar mass of air to be 28.8 and the molar ma..
A beam of light shoots from air into a piece of glass. If the refracted angle is half of the incident angle, what is the incident angle
A spring that has a force constant of 1050 N/m is mounted vertically on the ground. By what distance does the spring compress
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