A definite method for losing weight is
A) exercise.
B) reduce Calorie intake.
C) maintain a low body temperature.
D) none of the above
Answer: B
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The typical size of the interstellar dust particles is ________ and they consist of ________.
A. about a micrometer or less; silicates and carbon compounds B. 1 cm; silicates and carbon compounds C. about a micrometer or less; hydrogen and helium D. 1 mm; hydrogen and helium
Sea level fluctuated several times during the Paleozoic. Which of the following is not a representative factor for sea level rise in the Paleozoic?
A) Melting of continental glaciers. B) Ocean basins stood high on the asthenosphere due to active seafloor spreading. C) Ocean basins stood high on the asthenosphere due to slow but continuous seafloor convergence. D) The breakup of the Precambrian supercontinent.
Torque: In the figure, the rectangular loop is pivoted about one side (of length 0.060 m), that coincides with the y-axis. The end (length 0.020 m) of the loop that lies in the xz-plane makes an angle of 37° with the x-axis as shown. The loop carries a current of I = 69 A in the direction shown. (In the side of the loop that is along the y-axis the current is in the +y direction.) If there is a uniform magnetic field of magnitude 9.7 T in the -x direction, find the magnitude of the torque that this magnetic field exerts on the loop.
Fill in the blank(s) with the appropriate word(s).
A resistor has a resistance of 30 
at 20
C If the temperature coefficient is 
what is its resistance at 200
C?
A. 24 
B. 27
C. 48
D. 54
E. 57