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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.
A revolving door consists of four rectangular glass slabs,with the long end of each attached to a pole that acts as the rotation axis. Find the rotational inertia of the entire door
Calculate the maximum electric field associated with a laser beam operated with a 10 mW power supply and a beam diameter of 1.0 mm
Two insulated wires, each 2.94 m long, are taped together to form a two-wire unit that is 2.94 m long. One wire carries a current of 8.36 A, What is the current I
A 1.10x10 kg car starts from rest and accelerates for 5.00s. The magnitude of the acceleration is a = 4.60 m/s . Determine the average power generated by the net force
The cheetah can reach atop speed of114km/h (71mi/h). While chasing its prey in a short sprint, find the cheetah's average acceleration during the short sprint
Tritium (3/1 H) is a heavy isotope of hydrogen, with an atomic mass of 3.016049 u. find the binding energy per nucleon for tritium
question1drawing velocitytime graphs of the following motions-a a city bus that is moving with a constant velocityb a
A 45.0-g object connected to a spring with a force constant of 30.0 N/m oscillates with an amplitude of 4.00 cm on a frictionless, horizontal surface. calculate the total energy of the system
A 60 kg man is riding on a 30 kg cart traveling at a speed of 2.7 m/s. He jumps off with zero horizontal speed relative to the ground. What is the resulting change in the cart's speed
A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45.0 degrees above the horizontal
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
You want to estimate the height of the Empire State Building. You start at its base and walk 15 m away. Then you approximate the angle from the ground at that point to the top to be 88 degrees. How tall do you estimate the Empire State Building to..
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