Physics, 10.11.2019 03:31 imantahir1200345
In a massive-star supernova explosion, a stellar core collapses to form a neutron star roughly 10 kilometers in radius. the gravitational potential energy released in such a collapse is approximately equal to g m2/r, where m is the mass of the neutron star, r is its radius, and g is the gravitational constant. using this formula, estimate the amount of gravitational potential energy released in a massive -star supernova explosion. how does it compare with the amount of energy radiated by the sun during its entire main-sequence lifetime?
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Physics, 22.06.2019 02:30
Aforce of 9.00 newtons acts at an angle of 19.0 to the horizontal. what is its component in the horizontal direction?
Answers: 2
Physics, 22.06.2019 12:30
As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?
Answers: 1
In a massive-star supernova explosion, a stellar core collapses to form a neutron star roughly 10 ki...
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