An 8 000-kg aluminum flagpole 100-m long is heated by the sun from a temperature of 10°C to 20°C. Find the heat transferred (in J) to the aluminum if the specific heat of aluminum is 0.215 cal/g/°C
a. 7.2 × 10^5
b. 7.2 × 10^7
c. 7.2 × 10^3
d. 7.2 × 10^1
e. 7.2 × 10^2
b
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When a compressive stress is applied parallel to the fibers of a composite material, cracks form at the fiber-matrix interface due to _________effect strain.
Fill in the blank(s) with the appropriate word(s).
If Earth's atmosphere were appreciably thicker, snow would appear
A) still white. B) yellow. C) blue. D) ultraviolet.
If we use 67 W of power to heat 148 g of water, how long will it take to raise the temperature of the water from 15°C to 25°C?
The specific heat of water is 4190 J/kg•K. A) 93 s B) 5.3 s C) 22 s D) 114 h
After landing on an unexplored Klingon planet, Spock tests for the direction of the magnetic field by firing a beam of electrons in various directions and by recording the following observations:
Electrons moving upward feel a magnetic force in the northwest direction. Electrons moving horizontally toward the north are pushed downward. Electrons moving horizontally toward the southeast are pushed upward. Mr. Spock therefore concludes that the magnetic field at this landing site is in which direction? A) toward the west B) toward the southwest C) toward the east D) toward the northeast E) toward the southeast