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Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. The density of a neutron star is roughly 10^14 times as great as that of ordinary solid matter. Suppose we represent the star as a uniform, solid, rigid sphere, both before and after the collapse. The star's initial radius was 6.0×10^5 km (comparable to our sun); its final radius is 18 km . If the original star rotated once in 29 days, find the angular speed of the neutron star.
Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. What is the voltage between the plates
A car driving at 20 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the car going when the driver changed the rate of dec..
A certain lightbulb has a tungsten filament with a resistance of 18.0 when cold and 138 when hot. Find the temperature of the hot filament
An ideal gas expands isothermally, performing 4.30×103J of work in the process. Calculate the heat absorbed during this expansion
A certain superconducting magnet in the form of a solenoid of length 0.60 m can generate a magnetic field of 6.0 T in its core, Find the number of turns in the solenoid
If an electron moves from one point at a potential of ?500.0 V to another point at a potential of +500.0 V, how much work is done by the electric field
Find tension in the back muscle and the compressional force
A 14.5 gram, 78.6 centimeter long steel guitar string is vibrating in its fourth harmonic. What is the tension on the steel guitar 'string'
An object is moving in simple harmonic motion with amplitude 0.28 m and total energy 2.5 J. What is the total energy of the system now
An 93-g arrow is fired from a bow whose string exerts an average force of 120N on the arrow over a distance of 77cm, What is the speed of the arrow as it leaves the bow
Frames k and k' are inertial frames. Frame k' is moving at a velocity of magnitude v realtive to frame k in the direction of the x-axis. there are rigid rods in each frame oriented along the direction of the relative velocity. someone in frame k meas..
a) At what angle (in degrees) should this strip be placed to yield an apparent focal spot size 2.5 mm x 1.5 mm. b) Using this size target, what angle is required to obtain a 2.5 mm x 2.5 mm apparent focal spot
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