A chunk of gold weighs 1 N on Earth. On the Moon its weight would be
A) less.
B) the same.
C) more.
Answer: A
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The specific heat of ice is 2.10 kJ/kg src="https://sciemce.com/media/4/d5e212f71484de1632.png" class="w-image" />?
the heat of fusion for ice at 0
is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg 
and the heat of vaporization of water at 100
is 2256 kJ/kg. What is the final equilibrium temperature when 20.0 grams of ice at Error! Hyperlink reference not valid.Error! Hyperlink reference not valid.15.0
is mixed with 5.00 grams of steam at 100
A. 44.1
B. 48.9
C. 52.7
D. 58.0
E. 65.2
Lens-Maker Formula: A double-convex thin glass lens has equal-magnitude radii of curvature. The focal length of the lens is +37.3 cm and the index of refraction of the glass is 1.52. What is the magnitude of the radius of curvature of each convex surface?
A. 39 cm B. 35 cm C. 31 cm D. 43 cm E. 46 cm
An x-ray photon of energy
J has what wavelength?
A. 200 nm B. 62.1 pm C. 32.7 nm D. 5.73 pm E. 1.07 nm
What two quantities did Edwin Hubble compare for a sample of galaxies to discover the expansion of the universe?
A) age and distance B) velocity and distance C) velocity and temperature D) luminosity and distance E) luminosity and temperature