Which of the following wavelengths could NOT be present as a harmonic on a 2-m-long string?
a. 4 m
b. 2 m
c. 1 m
d. 0.89 m
e. 0.5 m
d
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A circuit consists of 2N resistors, all of resistance R, connected as shown below. A potential difference V is applied to one end, and the other end is at ground potential. The equivalent resistance of the circuit is
a.
.
b.
R.
c.
Which relative dating principle states that in an undeformed sequence of sedimentary rocks, each layer is older than the one above and younger than the one below?
A) original horizontality B) superposition C) cross-cutting D) inclusion
When an electron is formed from a gamma ray collision, a positron is also made
Indicate whether the statement is true or false
About how many times more luminous than our Sun is a young solar mass protostar just beginning convective contraction?
A) 2-5 B) 5-10 C) 10-100 D) 100-1000 E) a million