The central star of the Crab Nebula has now collapsed into a ________, whose energy keeps this famous nebula visible even in binoculars
Fill in the blank(s) with correct word
pulsar
You might also like to view...
Energy in Inductors: Inductors store energy by accumulating excess charge within their coils.
A. True B. False
A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)
A) 9.46 × 1015 mi B) 9.46 × 1012 mi C) 5.88 × 1012 mi D) 5.88 × 1015 mi
In a nuclear power reactor of the type used to generate electricity, a neutron bombards a uranium nucleus, causing it to split into two large pieces (fission fragments) plus two or three neutrons
Energy is released in this process in the form of electromagnetic radiation and kinetic energy. Which of the following is an accurate statement concerning what happens in such a fission process? A) The electrical energy generated comes from the kinetic energy of the incident neutrons. B) The electrical energy generated comes from chemical energy stored in the electron bonds of the uranium atom. C) Electrical energy is generated because the fission fragments are electrically charged, whereas the uranium was electrically neutral. D) An intermediate step involves the fusion of protons to form helium nuclei, and energy is released in this process. E) The total mass of the particles after fission is less than the total mass of the particles (uranium nucleus plus one neutron) before fission, and this decrease in mass ?m is converted into energy E, where E = ?mc2.
A spring with a spring constant of 2500 N/m. is stretched 4.00 cm. What is the work required to stretch the spring?
A) 4.00 J B) 0 J C) 1.00 J D) 3.00 J E) 2.00 J