The circuit in the figure below consists of two resistors, a switch, an ammeter, and a battery. When the switch is closed, power Pc is delivered to resistor R1. When the switch is opened, which of the following statements is true about the power Po delivered to R1?
1
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At apogee, the Moon is at its farthest from Earth and thus appears smaller than normal. Because of this it can produce only annular solar eclipses, but not total solar eclipses
Indicate whether the statement is true or false
Even though K- and M-type stars are suitable for life, why might they not have many habitable planets around them?
A) because their habitable zones are very wide B) because their habitable zones are very narrow C) because their lifetimes are too short D) because they contain too few heavy elements to form planets
On a clear night you go outside and face south and see circumpolar stars. Then you turn and face north and you see stars rising in the east and setting in the west. Where are you located on Earth?
a. equator b. a mid-latitude between the equator and the north pole c. south pole d. a mid-latitude between the equator and the south pole
Which has the more predictable behavior, an electron or a proton, and why?
A) An electron, because of its smaller mass. B) A proton, because of its larger mass. C) A proton, because it does feel the nuclear force. D) An electron, because of its smaller charge. E) An electron, because it doesn't feel the nuclear force.