A wire carries a steady current of 0.1 A over a period of 200 s. What total charge passes through the wire in this time interval?
a. 2 C
c. 0.005 C
b. 200 C
d. 20 C
D
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Sound waves in the early universe traveled faster than half of the speed of light
Indicate whether the statement is true or false
What happened at the start of the Cambrian Period?
A) the first oxygen-producing bacteria appeared B) the first dinosaurs appeared C) early humans first appeared D) an explosion of genetic diversity appeared, leading to the appearance of the first animals
A spherical conductor (radius = 1.0 cm) with a charge of 2.0 pC is within a concentric hollow spherical conductor (inner radius = 3.0 cm, outer radius = 4.0 cm) which has a total charge of ?3.0 pC. What is the magnitude of the electric field 2.0 cm from the center of these conductors?
A. 23 N/C B. zero C. 45 N/C D. 90 N/C E. 110 N/C
The existence of the world's subtropical deserts (such as the Sahara) is primarily due to
A) warm ocean currents. B) strong prevailing northwesterly winds. C) extremely high temperatures. D) belts of atmospheric high pressure.