Two 1.5-V batteries are inserted into a flashlight. The batteries are in series, with their positive terminals in the same direction. One battery has an internal resistance of 0.15 ?, and the other has an internal resistance of 0.20 ?. When the switch is closed, a current of 0.54 A passes through the flashlight bulb. What is the resistance of the bulb?
a. 0.079 ?
b. 1.5 ?
c. 5.2 ?
d. 5.6 ?
c
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What is the K-T boundary?
A) a layer of dark sediment in the geological record formed at the same time humans learned to use fire B) a boundary between rocks containing the oldest life and older rocks that contained no life C) a boundary between the Earth's crust and the molten rock beneath it D) a layer of dark sediment in the geological record separating the Cretaceous and Tertiary periods of Earth's history
The true edges of the continental landmasses are called the ______________
Fill in the blank(s) with correct word
What effect does the precession of the Moon's nodes have on eclipses?
A) It causes us to have lunar eclipses exactly every 6 months. B) It causes eclipses to occur a little less often than they would if the nodes did not precess. C) It causes eclipses to occur a little more often than they would if the nodes did not precess. D) Without this precession, eclipses could never occur. E) Without this precession, eclipses would occur every month.
A 50-kg satellite circles planet Cruton every 5.6 h in an orbit with a radius of 12 × 10^6 m. What is the magnitude of the gravitational force on the satellite by planet Cruton?
a. 63 N b. 58 N c. 68 N d. 73 N e. 50 N