An AC generator consists of 6 turns of wire. Each turn has an area of 0.040 m2 . The loop rotates in a uniform field (B = 0.20 T) at a constant frequency of 50 Hz. What is the maximum induced emf?
a. 13 V
b. 2.4 V
c. 3.0 V
d. 15 V
e. 4.8 V
d
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Which of the following compounds would least likely act as an acid?
A) SO4-2 B) HSO4-1 C) H2SO4 D) NH3 E) CH3CO2H
Which domains of life consist entirely or microbes?
A) bacteria only B) archaea and eukarya C) bacteria and archaea D) archaea only
You are riding in a spaceship that has no windows or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. What should you do?
A) You can determine if the ship is moving by determining the apparent velocity of light. B) You can determine if the ship is moving by checking your precision time piece. If its running slow, the ship is moving. C) You can determine if the ship is moving either by determining the apparent velocity of light or by checking your precision time piece. If its running slow, the ship is moving. D) You should give up because you have taken on an impossible task.
Resolution: In one particular case, the limiting angle of resolution for an eye is 1.4 × 10-4 rad. What is the minimum separation between two point sources of light that the eye can distinguish if they are at a distance of 40 m from the observer?
A. 2.8 mm B. 5.6 mm C. 1.4 mm D. 8.4 mm E. 4.7 mm