How is it possible for Mercury and the Moon to have water ice at their poles?
What will be an ideal response?
Shadows at the bottom of craters keep sunlight from hitting the ground, so the temperature has always been low enough that ice there has never vaporized and escaped, or that came in with impacting comets and asteroids.
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The energy of an electron in the p-level of an atom is changed in the presence of a magnetic field of magnitude 4.6 T
What is the difference between the largest and smallest possible energies? (Bohr magneton = ?B = 9.27 × 10-24 J/T)
A sound wave coming from a tuba has a wavelength of 1.10 m and travels to your ears at a speed of 253 m/s. What is the frequency of the sound you hear?
a. 278 Hz b. 1/278 Hz c. 230 Hz d. 1/230 Hz e. 252 Hz
The number of significant figures in 10001 is
A) two. B) three. C) five. D) six.
A measurement of an electron's speed is 2.0 × 106 m/s and has an uncertainty of 10%. What is the minimum uncertainty in position?
A) 0.29 nm B) 0.58 nm C) 0.87 nm D) 1.2 nm E) 1.6 nm