Choose the correct statement
a. The perceived pitch of a sound usually doesn't depend on the sound's frequency.
b. The frequency of each musical note is 10 Hz higher than that of the next lower note.
c. The decibel is the standard measure of tone quality.
d. The perceived loudness of a sound depends somewhat on frequency.
D
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Observations of galaxies and clusters of galaxies indicate that about ____ percent of the matteruniverse is dark matter
a. 5 b. 25 c. 35 d. 45 e. 95
A system consists of N gas molecules, each with mass m. Their rms speed is vrms. Their total translational kinetic energy is:
A. (1/2)m(Nvrms)2 B. (1/2)N(mvrms)2 C. (1/2)mv2 rms D. (1/2)Nmv2 rms E. N [(1/2)mvrms] 2
Carbon has a negative temperature coefficient of resistance of –0.5 × 10^–3 (°C)?1 . What temperature increase would result in a resistance decrease of 1.0% for a carbon resistor?
a. 2.0°C b. 20°C c. 20°C d. 50°C e. 100°C
When the height of an object is doubled, its gravitational potential energy is increased by a factor of ______________
Fill in the blank(s) with correct word