An automobile travels due north with a constant speed of 76 km/h. All forces considered, the unbalanced force acting on the auto is
a. zero.
b. southward.
c. northward.
d. downward.
e. upward.
Answer: a. zero.
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The mass density of normal air is, at a particular temperature,
If the average molecular mass of air is 29.0 u, how many air molecules are in spherical balloon of radius 15.0 cm?
A. 
B. 
C. 
D. 
E. 
F. 
Which of the following describes an object that is accelerated?
A) A car slowing down while moving along a straight line B) A car rounding a curve at a steady 80 km/hr C) Both of the above. D) A car moving up a straight hill [a hill whose "slope" is unchanging] at a steady 80 km/hr, when the car is midway up the hill E) All of the above.
An air-filled capacitor stores a potential energy of 6.00 mJ due to its charge. It is accidentally filled with water in such a way as not to discharge its plates
How much energy does it continue to store after it is filled? (The dielectric constant for water is 78 and for air it is 1.0006.) A) 0.077 mJ B) 468 mJ C) 0.040 mJ D) 6.00 mJ
Saturn's moon named ______________ is the second largest moon in the solar system
Fill in the blank(s) with correct word