A 2.00 m by 3.00 m plate of aluminum has a mass of 324 kg. What is the thickness of the plate? (The density of aluminum is 2.70 103 kg/m3.)
[Ques. 2] The standard kilogram is a platinum-iridium cylinder 39 mm in height and 39 mm in diameter. What is the density of the material?
[Ques. 3] A rectangle has a length of 1.323 m and a width of 4.16 m. Using significant figure rules, what is the area of this rectangle?
a. 5.50368 m2
b. 5.5037 m2
c. 5.504 m2
d. 5.50 m2
e. 5.5 m2
[Ques. 4] 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.
[Ques. 5] If each frame of a motion picture film is 35 cm high, and 24 frames go by in a second, estimate how many frames are needed to show a two-hour-long movie.
a. 1400
b. 25,000
c. 50,000
d. 170,000
e. This cannot be determined without knowing how many reels were used.
[Ques. 6] A standard exam page is 8.5 inches by 11 inches. An exam that is 2.0 mm thick has a volume of
a. 1.9 104 mm3.
b. 4.7 104 mm3.
c. 1.2 105 mm3.
d. 3.1 105 mm3.
e. 3.1 103 mm3.
[Ques. 7] The standard exam page is 8.50 inches by 11.0 inches. Its area in cm2 is
a. 19.5.
b. 36.8.
c. 93.5.
d. 237.
e. 603.
[Ques. 8] John and Linda are arguing about the definition of density. John says the density of an object is proportional to its mass. Linda says the object's mass is proportional to its density and to its volume. Which one, if either, is correct?
a. They are both wrong.
b. John is correct, but Linda is wrong.
c. John is wrong, but Linda is correct.
d. They are both correct.
e. They are free to redefine density as they wish.
[Ques. 9] One U.S. fluid gallon contains a volume of 231 cubic inches. How many liters of gasoline would you have to buy in Canada to fill a 14-gallon tank? (Note: 1 L = 103 cm3.)
a. 53
b. 21
c. 14
d. 8.0
e. 4.0
[Ques. 10] One mole of the carbon-12 isotope contains 6.022 1023 atoms. What volume in m3 would be needed to store one mole of cube-shaped children's blocks 2.00 cm long on each side?
a. 4.8 1018
b. 1.2 1022
c. 6.0 1023
d. 1.2 1024
e. 4.8 1024
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