In the context of binary systems, a _____ is an explosion involving a white dwarf

A) nova
B) sunspot
C) comet
D) zenith


A

Physics & Space Science

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A__________is a small nebula that varies irregularly in brightness, evidently associated with star formation

A) Herbig-Haro object B) brown dwarf C) Bok globule D) T Tauri star

Physics & Space Science

When an electron collides with a positron the two particles

A) fuse to form a heavier particle B) bounce off each other C) are destroyed, producing a pair of high-energy gamma rays D) are destroyed, producing another pair of particles

Physics & Space Science

A non-uniform meter stick is found to balance on a knife edge at the 60-cm mark. Where is the center of gravity of the meter stick?

a. at the 40-cm mark b. at the 45-cm mark c. at the 50-cm mark d. at the 55-cm mark e. at a position not given

Physics & Space Science

In a loop in a closed circuit, the sum of the currents entering a junction equals the sum of the currents leaving a junction because

a. the potential of the nearest battery is the potential at the junction. b. there are no transformations of energy from one type to another in a circuit loop. c. capacitors tend to maintain current through them at a constant value. d. current is used up after it leaves a junction. e. charge is neither created nor destroyed at a junction.

Physics & Space Science