LC Circuits: What inductance is needed in series with a 4.7-?F capacitor so the circuit will oscillate at a frequency of 10 kHz?
A. 21 ?H
B. 54 ?H
C. 4.7 mH
D. 5.4 mH
Answer: B
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An astronomical telescope has an objective lens with focal length 800 mm and produces an angular magnification of 40 when used with only its eyepiece. What is the distance between the objective lens and the eyepiece when this telescope is in use?
1.800 mm 2.820 mm 3.780 mm 4.One cannot find this length until one knows the focal length of the eyepiece.
Process of Science: A scientific theory must produce testable hypotheses that are then evaluated when data are available
What testable hypotheses does nebular theory predict? Describe two hypotheses about solar systems that come from nebular theory that we can test when more data on other solar systems become available.
A vibrating tuning fork causes an identical fork nearby to vibrate. This is called
1) refraction. 2) resonance. 3) beats. 4) reverberation. For this to occur, both forks must have the same (or multiple) 5) intensities. 6) amplitudes. 7) frequencies. 8) geometries. 9) all of these.
A meteor that survives its passage through the atmosphere and strikes the ground is called a meteoroid
Indicate whether the statement is true or false