A musical tone, sounded on a piano, has a frequency of 820 Hz and a wavelength in air of 0.400 m. What is the wave speed?
a. 587 m/s
c. 235 m/s
b. 328 m/s
d. 170 m/s
B
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The resulting atomic number of an element that emits 1 alpha particle, 1 positron, and 3 beta particles is
A) decreased by 2. B) decreased by 1. C) unchanged. D) increased by 1. E) increased by 2.
A simple pendulum has a period of 4.40 s. What is the pendulum length? (g = 9.80 m/s2)
a. 19.2 m b. 15.1 m c. 4.81 m d. 0.208 m e. 0.0520 m
A 0.10-?F capacitor is connected to a 120-V rms 60-Hz source. (a) What is its capacitive reactance? (b) What is the rms current to the capacitor? (c) If both the capacitance and the frequency were doubled, what would be the rms current?
What will be an ideal response?
What could have been habitable if the Sun had been twice as massive?
A: Mercury B: Venus C: Jupiter's moons D: Neptune E: Pluto