In comparing our own solar system with others found to date, we find:
A) most orbits are less circular than the orbits of planets around our Sun.
B) jovians often lie much closer to their suns than ours do.
C) multiple planets are found in some systems.
D) hot Jupiters, even closer to their stars than Mercury is to our Sun.
E) All of the above
E
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Which of these gases is most responsible for the greenhouse effect on Earth?
a. oxygen (O2) b. nitrogen (N2) c. carbon dioxide (CO2) d. ozone (O3) e. ammonia (NH3)
A horizontal wire of length 3.0 m carries a current of 6.0 A and is oriented so that the current direction is 50° S of W. The Earth's magnetic field is due north at this point and has a strength of 0.14 × 10^?4 T. What is the direction of the force on the wire?
a. out of the Earth's surface b. toward the Earth's surface c. due east d. 40° S of E
Magnetic Field of a Long Wire: A wire lying in the plane of the page carries a current toward the bottom of the page, as shown in the figure. What is the direction of the magnetic force it produces on an electron that is moving to the left directly toward the wire, as shown?
A. straight into the page B. straight out of the page C. directly toward the top of the page D. directly toward the bottom of the page E. directly to the left away from the wire
A 120-V rms voltage at 1000 Hz is applied to an inductor, a 2.00-?F capacitor and a 100-? resistor. If the rms value of the current in this circuit is 0.680 A, what is the inductance of the inductor?
A) 34.2 mH B) 35.8 mH C) 11.4 mH D) 17.9 mH E) 22.8 mH