The flow rate of blood through the average human aorta, of radius 0.95 cm, is about 90 cm3/s. What is the speed of the blood flow through the aorta?
a. 14 cm/s
c. 37 cm/s
b. 32 cm/s
d. 29 cm/s
B
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A piece of aluminum has density 2.70 g/cm3 and mass 770 g. The aluminum is submerged in a container of oil of density 0.650 g/cm3 . A spring balance is attached with string to the piece of aluminum. What reading will the balance register in grams (g) for the submerged metal?
a. 955 g b. 185 g c. 585 g d. 2 430 g e. 1 010 g
Conversion of Units: A spherical fruit has a radius of 3.23 cm. What is the volume of the fruit in cubic meters?
A. 1.41 × 10-4 m3 B. 1.41 m3 C. 4.23 × 10-4 m3 D. 4.23 m3
When light passes at an angle to the normal from one material into another material in which its speed is lower
a. it is bent toward the normal to the surface. b. it always lies along the normal to the surface. c. it is unaffected. d. it is bent away from the normal to the surface.
The amplitude of a system moving with simple harmonic motion is doubled. The total energy will then be
a. 4 times as large. b. 3 times as large. c. 2 times as large. d. the same as it was. e. half as much.