What is the rms speed of a helium atom: (a) at 5. K? (b) at -196.°C (the boiling point of N2)? (c) at 100.°C?
What will be an ideal response?
(a) 176. m/s
(b) 692. m/s
(c) 1.52 × 103 m/s
Physics & Space Science
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A star of spectral type O lives approximately how long on the main sequence?
A) 1,000 years B) 10,000 years C) 10 million years D) 100 million years E) 1 billion years
Physics & Space Science
If the sum of the forces exerted on a 4.5-kg tool accelerates it at 40 m/s2, what acceleration would that same sum of the forces give to an 18-kg tool?
A) 180 m/s2 B) 10 m/s2 C) 160 m/s2 D) 9.8 m/s2 E) 32 m/s2
Physics & Space Science
The source of the sun's energy is
A) chemical reactions. B) gravitational energy. C) granola bars. D) nuclear fusion. E) nuclear fission.
Physics & Space Science
In which atmospheric layer does all our weather occur?
What will be an ideal response?
Physics & Space Science