Physics G485 definitions 4.5 / 5 based on 11 ratings ? PhysicsA2/A-levelOCR Created by: Emily BCreated on: 19-02-13 22:43 985243617 Across 1. The mean time taken for half the number of active nuclei in a radioactive sample to decay (4, 4) 4. The strength of the magnetic field (8, 4, 7) 5. For an infinite, uniform and static universe, the night sky should be bright because of light received in all direction from stars (6, 7) 6. The distance travelled by light in one year. =9.5x10^15 m (5, 4) 7. The ratio of the speed of a receding galaxy to its distance from the observer. =v/x (7, 8) Down 2. The shifting of the entire spectrum of a receding source to longer wavelengths (8) 3. The remnant of a massive star formed as a result of matter collapsing to a singular point. The density of a black hole is so intense that even light cannot escape from it. (5, 4) 4. The product of magnetic flux density normal to a circuit and the cross-sectional area of the circuit. unit is Weber's (8, 4) 8. Unit of capacitance. 1F = 1CV^-1 (5) 9. The minimum external energy required to seperate all the neutrons and protons of a nucleus (7, 6)
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