One number has three significant figures and another number has four significant figures. If these numbers are added, subtracted, multiplied, or divided, which operation can produce the greatest number of significant figures?
a. the addition
b. the subtraction
c. the multiplication
d. the division
e. All the operations result in the same number of significant figures.
a
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Impulse: A 0.140-kg baseball is thrown with a velocity of 27.1 m/s. It is struck by the bat with an average force of 5000 N, which results in a velocity of 37.0 m/s in the opposite direction from the original velocity. How long were the bat and ball in contact?
A. 1.79 × 10-3 s B. 1.28 × 10-2 s C. 3.07 × 10-2 s D. 4.30 × 10-3 s
At the end of its life, what kind of pressure will support our Sun?
A) neutron degeneracy pressure B) quark degeneracy pressure C) electron degeneracy pressure D) pressure from interstellar dust particles
When gasoline is burned, it gives off 41 000 J/g of heat energy. If an automobile uses 14.1 kg of gasoline per hour with an efficiency of 23.0%, what is the average horsepower output of the engine? (1 hp = 746 W)
a. 49.5 hp b. 105 hp c. 35.1 hp d. 29.8 hp e. 59.5 hp
How would you describe the size of the following object?
a blood cell A) microscopic B) macroscopic C) submicroscopic D) all of the above E) none of the above