You stand on a bathroom scale at the equator and at the north pole. The scale reading at the equator is _______________ the scale reading at the north pole
Fill in the blank(s) with correct word
slightly smaller than
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How much heat (in kcal) must be removed to make ice at ?10°C from 2 kg of water at 20°C? (The specific heat of ice is 0.50 cal/g/°C.)
a. 190 b. 200 c. 240 d. 210 e. 50
If a laser printer prints at 600 dots per inch, what is their angular separation when viewed from 40 cm?
a. 
b. 
c. 
d. 
e. 
Cygnus X-1 and LMC X-3 are black holes if the masses of the unseen companions are
a. less than 5 solar masses. b. more than 5 solar masses. c. between 0.4 and 1.4 solar masses. d. less than 0.4 solar masses e. not larger than the masses of the stars that we can see.
As the Sun rotates, an individual sunspot can be tracked across its face. From eastern to western limb, this takes about
A) 12 hours. B) a week. C) two weeks. D) a month. E) 5.5 years.