It takes ________ years for the sun to progress through one sunspot cycle from a maximum area covered with sunspots, to a minimum, and back to a maximum. Refer to the graph above
A) about 1 year
B) about 110 years
C) about 10 years
D) This figure cannot be used to answer this question.
C
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What is the least value for an index of refraction?
A. 0 B. 0.5 C. 1 D. just less than 1 E. (1/2)1/2
A 12-kg mass is placed on a 25.0° incline, and friction keeps it from sliding. The coefficient of static friction in this case is 0.580, and the coefficient of sliding friction is 0.520 . What is the frictional force in this situation?
a. 55.4 N c. 49.7 N b. 107 N d. 61.2 N
An electron moving along the +x-axis enters a magnetic field. If the electron experiences a magnetic deflection in the -y direction, then the magnetic field must have a component
A) along the +y-axis B) along the -x-axis C) along the -z-axis D) along the +z-axis E) along the -y-axis
An aquifer is a reservoir of water beneath the ground surface. Describe five physical zones in an aquifer. (Hint: Consider in-flow and out-flow.)
What will be an ideal response?