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.
Answer: C
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A 120 kg mass is blown apart into an 80 kg piece and a 40 kg piece. After the blast, the two masses are moving apart with a relative velocity of 60 m/s. The total kinetic energy after the explosion is
A. 21 kJ. B. 35 kJ. C. 48 kJ. D. 56 kJ. E. 82 kJ.
This photograph shows a hurricane from space. Why does it have the clockwise swirl?
A) because of the Coriolis effect B) because it is a strong hurricane C) because it is in the Northern Hemisphere D) because of the greenhouse effect
In what part of the spectrum are starburst galaxies brightest? Remember: Starbursts are dusty. What does dust do?
A.) X-ray. B.) Ultraviolet. C.) Visible. D.) Infrared. E.) Radio.
Exhibit 4-1While her kid brother is on a wooden horse at the edge of a merry-go-round, Sheila rides her bicycle parallel to its edge. The wooden horses have a tangential speed of 6 m/s. Sheila rides at 4 m/s. The radius of the merry-go-round is 8 m.Use this exhibit to answer the following question(s). Refer to Exhibit 4-1. At what time intervals does Sheila encounter her brother, if she rides opposite to the direction of rotation of the merry-go-round?
A. 5.03 s B. 8.37 s C. 12.6 s D. 25.1 s E. 50.2 s