If three identical bulbs are connected in parallel across a 12-V battery, the voltage across each bulb will be
a. 12 V.
b. 4 V.
c. different.
d. none of the above.
a
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Energy utilization appears to be
A) a sufficient condition, but not a necessary condition for life B) both a necessary condition and a sufficient condition for life C) neither a necessary condition nor a sufficient condition for life D) a necessary condition, but not a sufficient condition for life
Observations of the cosmic background radiation from the COBE satellite revealed tiny variations in its temperature by about 1 part in 100,000
Indicate whether the statement is true or false
Geologic evidence places Earth's age at ______________ million years
Fill in the blank(s) with correct word
Gamma rays are photons with very high energy. How many visible-light photons with a wavelength of 500 nm would you need to match the energy of a gamma-ray photon with energy 4.1 × 10-13? (h = 6.626 × 10-34 J • s, c = 3.00 × 108 m/s)
A) 1.0 × 106 B) 1.4 × 108 C) 6.2 × 109 D) 3.9 × 103