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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 1014 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 8.0×105km (comparable to our sun); its final radius is 18km .
If the original star rotated once in 25 days, find the angular speed of the neutron star.
An air molecule is moving at a velocity of 444 m/s. How various meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules.
A monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that six different wavelengths are observe, what is the shortest wavelength
Light from a 554-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 22 °
A parallel-plate capacitor has an area of 5.15 cm2, and the plates are separated by 1.05 mm with air between them. It stores a charge of 337pC. What is the potential difference across plates of the capacitor.
Write at least one paragraph in which you define focal length, object and image distance and magnification. Explain the difference between real and virtual images
On a frictionless, horizontal air table, puck A (with mass 0.250 kg) is moving toward puck B (with mass 0.370 kg), which is initially at rest. What was the speed of puck A before the collision
As part of a safety investigation, two 1800 cars travelling at 18 are crashed into different barriers. Find an average forces exerted on (a) car that hits a line of water barrels and takes 1.80 to stop, and (b) car that hits a concrete barrier and ta..
The tune-up specifications of a car call for the spark plugs to be tightened to a torque of 38Nm. With what force must you pull
The work function for zinc is 4.31 eV. Ultraviolet light of wavelength 144 nm is incident on the clean surface of a zinc sample. What is the photon energy of the ultraviolet light
A jogger accelerates from rest to 2.12 m/s in 3.34 s. A car accelerates from 24.1 to 38.6 m/s also in 3.34 s. Find the magnitude of the acceleration of the jogger
What is the velocity of observer B relative to observer A . A diver shines a light up to surface of a flat glass-bottomed boat at an angle of 36 relative to the normal.
If there had been no explosion, the shell would have landed a distance from the mortar. Suppose that air resistance and the mass of the shell's explosive charge are negligible. Determine the distance from the mortar at which the larger piece of th..
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