Gravity obeys an inverse square relation. This statement implies that the force due to gravity between two masses
a. will increase as the distance between the two masses increases.
b. will decrease as the square of the distance between the two masses increases.
c. will cause the two masses to move away from each other.
d. will cause the two masses to move in a straight line.
e. will cause the two masses to orbit each other.
b
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The Big Bang is a theory describing the ____
a. birth of our Solar System b. start of civilization on Earth c. beginning of planet formation d. beginning of the Universe e. massive extinction of dinosaurs
Iced tea is made by adding ice to 3.0 kg of hot tea, initially at 80°C. How many kg of ice, initially at 0°C, are required to bring the mixture to 10°C? (Lf = 3.33 x 105 J/kg, cw = 4186 J/kg•°C)
a. 2.8 kg c. 1.4 kg b. 1.6 kg d. 2.3 kg
Atmospheric lifting resulting from the convergence of two different air masses is called
A) convectional lifting. B) orographic lifting. C) adiabatic lifting. D) frontal lifting.
The Swift satellite observes what portion of the electromagnetic spectrum?
A) gamma-ray B) X-ray C) ultraviolet D) optical E) All of the above