An AC generator has 80. rectangular loops on its armature. Each loop is 12. cm long and 8.0 cm wide. The armature rotates at 1200. rpm about an axis parallel to the long side
If the loop rotates in a uniform magnetic field of 0.30 T, which is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator?
A) 220 V
B) 124 V
C) 182 V
D) 167 V
E) 120 V
C
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How does a high pH affect an enzyme's activity?
a. It deceases it. b. It increases it. c. It changes the shape of all enzymes. d. It does not affect the enzyme but it lowers the availability of substrate. e. It varies with different enzymes; some work well at a high pH, others do not.
Reverberation time of a room can be increased by covering the walls with better reflectors of sound
a. True b. False Indicate whether the statement is true or false
Resolution: Astronomers are proud of their telescopes and often say they can "resolve a dime at so many miles." How many miles from a 102-cm-diameter telescope mirror can you place a coin of diameter 3.0 cm and just resolve the coin using light of wavelength 389 nm? (1 mi = 1.609 km)
A. 19 mi B. 9.7 mi C. 40 mi D. 190,000,000 mi
Describe qualitatively how the formation of deuterium and its current abundance is related to the critical density of the universe
What will be an ideal response?