The Crab Nebula is an example of a(n) ________
Fill in the blank(s) with correct word
supernova remnant
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Which of the following statements is true of the rings of Saturn?
A) Unlike A and B rings, C rings are dust-size ice crystals. B) C ring particles contain more minerals and less ice. C) C ring particles are less than half as bright as particles in the A and B rings. D) All the ring particles that are at the same distance from the planet orbit at different speeds.
Springs: An ideal spring has a spring constant (force constant) of 60 N/m. How much energy does it store when it is stretched by 1.0 cm?
A. 0.0030 J B. 0.30 J C. 60 J D. 600 J
An object is placed 10 cm in front of a concave mirror with a 20-cm focal length. Determine the image location (in cm)
a. ?20 b. ?15 c. ?10 d. ?5 e. 6.7
The Bohr model pictures a hydrogen atom in its ground state as a proton and an electron separated by the distance a0 = 0.529 × 10^-10 m. The electric potential created by the electron at the position of the proton is
a. -13.6 V. b. +13.6 V. c. -27.2 V. d. +27.2 V. e. +5.12 × 10^9 V.