The Sun's habitable zone
A) extends from some place a little beyond the orbit of Venus to some place near the orbit of Mars.
B) consists only of Earth, because Earth is the only planet known to be inhabited.
C) extends from the orbit of Earth to the orbit of Jupiter.
D) extends from just beyond the orbit of Mercury to just beyond Earth's orbit.
A) extends from some place a little beyond the orbit of Venus to some place near the orbit of Mars.
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A 30-?F capacitor is charged to an unknown potential V0 and then connected across an initially uncharged 10-?F capacitor. If the final potential difference across the 10-?F capacitor is 20 V, determine V0.
A. 13 V B. 27 V C. 20 V D. 29 V E. 60 V
When there is a net absorption of energy in a chemical reaction, it is called a(n) ______________ reaction
a. exothermic b. activation c. endothermic d. combustion
If a block is set sliding on a huge imaginary frictionless plane in contact with Earth's surface, it will NOT sustain a constant speed because
A) a component of gravitational force parallel to the plane soon acts on it. B) gravity gets weaker as distance increases. C) it is not free from the shackles of Earth's gravity. D) of its inertia.
A planoconvex lens of radius R and index of refraction n is placed curved side down on flat glass surface. This configuration is being used to measure the wavelength of light produced by a particular light source. If the radius of the dark rings produced by interference is r, what is the wavelength of the light? Assume the setup is in air
1. rn/mR 2. Rn/mr 3. mR/nr2 4. R2/mR