O3 and O2 are the two ______________ of the element oxygen
Fill in the blank(s) with correct word
allotropes
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A liter is equivalent to 33.8 fluid ounces. How many liters of gasoline are required to fill a 21 gallon gas tank, if 1 gallon is equivalent to 128 fluid ounces?
A. 210 liters B. 710 liters C. 80 liters D. 6 liters
A magnet of solid metal is placed in a magnetic field. Within the magnet, the magnetic field is greater than that outside (but still oriented in the same direction). The magnet is then heated by an external source to a very high temperature. The magnetic field inside the magnet is now significantly weaker but still greater than the outside field. What kind of magnet is this?
Three boxes slide on a frictionless horizontal surface when pulled by a force of magnitude F. When we compare the tensions 
and 
with the force F, we find that
?
?
?
A.
= 
= F.B.
= F>.C.
= .D.
>.E.
<? .What type of civilization would be able to construct a "Dyson Sphere" around its parent star to capture its radiation?
A) Type III B) Type IV C) Type II D) Type I