Resistance and Resistivity: Calculate the current through a 10.0-m long 22-gauge nichrome wire with a radius of 0.321 mm if it is connected across a 12.0-V battery. The resistivity of the nichrome is 1.00 × 10-6 ? ? m.
A. 30.9 A
B. 61.8 A
C. 0.388 A
D. 0.776 A
Answer: C
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The Hertzprung—Russell diagram is a plot of
A) radial velocity against distance B) apparent brightness against time C) luminosity against distance D) luminosity against surface temperature
A charge Q1 is located at coordinates (x = +a, y = +a). A second charge Q2 , identical to Q1, is located in such a way that the net electric field at the origin of the coordinate axis (x = 0, y = 0 ) is equal to 0
What are the coordinates of Q2? A) x= -a, y = +a B) x = +a, y = +a C) x = 0, y = 0 D) x = -a, y = -a E) x = +a, y = -a
Rotational Dynamics: The rotating systems shown in the figure differ only in that the two identical movable masses are positioned a distance r from the axis of rotation (left), or a distance r/2 from the axis of rotation (right). If you release the hanging blocks simultaneously from rest,
A. the block at the left lands first. B. the block at the right lands first. C. both blocks land at the same time.
Lunar eclipses are more commonly seen than solar eclipses
Indicate whether the statement is true or false