What is the wavelength in meters, of a sound wave (v = 340 m/s) with a frequency of 4 Hz?
a. 85 Hz
b. 1360 Hz
c. 340 Hz
d. 0.012 Hz
a
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What is the current through a resistor if 4.0 × 1016 electrons pass a point in the resistor in 0.50 s? (e = 1.60 × 10-19 C)
A) 0.013 A B) 0.31 A C) 6.3 A D) 78 A
An astronaut has landed on an asteroid and conducts an experiment to determine the free fall acceleration on that asteroid
He uses a simple pendulum that has a period of oscillation of 2.00 s on Earth and finds that on the asteroid the period is 11.3 s. What is the free fall acceleration on that asteroid? A) 0.307 m/s2 B) 1.66 m/s2 C) 1.74 m/s2 D) 5.51 m/s2 E) 0.0544 m/s2
In a p-type semiconductor, a hole is
A) an extra proton supplied by a donor atom. B) an extra electron supplied by a donor atom. C) a donor atom. D) a region where an electron is missing. E) a missing atom in the crystalline structure.
On a planet whose Moon is in the same orbital plane as the planet's orbit around its star, how often will solar eclipses occur?
a) Twice every orbit of its moon (twice a month). b) Once every orbit of the planet around its Sun (its year). c) Twice every rotation of the planet (twice a day). d) Once every orbit of its moon (its month). e) Once every rotation of the planet (its day).