The buoyant force that keeps a ship afloat is an example of
a. Archimedes' principle.
b. Pascal's principle.
c. Bernoulli's principle.
d. Torricelli's principle.
e. none of these principles.
a
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A radar pulse sent out to an airplane at a distance of 20.0 km will return as an echo to the source in what time interval? (c = 3.00 × 10^8 m/s)
a. 33.3 × 10^-6 s c. 66.7 × 10^-6 s b. 133 × 10^-6 s d. 0.0333 × 10^-6 s
Which planet search technique is currently best suited to finding Earth-like planets?
A) transit B) gravitational lensing C) Doppler D) astrometric E) combining all the above
Carbon-14 dating can be used to find the age of material up to ____________ of years old
a. millions c. hundreds of thousands b. billions d. tens of thousands
What is Newton's Third law of motion?
A. When two bodies interact, they create equal and opposite forces on each other. B. Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them. C. Force equals mass times acceleration, F = ma. D. A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it.