In terms of e, what is the charge of a particle whose quark composition is uds?
A. 0
B. 1
C. -1
D. 2
E. -2
A. 0
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What is the value of n in the Balmer series for which the wavelength is 410.2 nm
A) 4 B) 5 C) 6 D) 7 E) 9
Mercury is mostly comprised of a large metallic core
a. True b. False Indicate whether the statement is true or false
Charges of 3.5 µC and ?7.6 µC are placed at two corners of an equilateral triangle with sides of 0.1 m. At the third corner, what is the electric field magnitude created by these two charges? (ke = 8.99 × 10^9 N·m2/C2)
a. 1.2E+7 N/C b. 3.0E+6 N/C c. 5.5E+6 N/C d. 5.9E+6 N/C e. 7.9E+6 N/C
Which of the following does not accurately describe what we observe toward the Galactic center?
A) at radio wavelengths, we see giant gas clouds threaded by powerful magnetic fields B) at infrared wavelengths, we see a massive stellar cluster C) at optical wavelengths, we see a cluster of old, red stars D) at X-rays, we see faint emission from an accretion disk around a black hole