A airplane having a metal surface and a wingspan of 25.0 m flies horizontally at 200. m/s where the earth's magnetic field is vertical with magnitude 45.0 ?T
(a) What emf is induced across the wings?
(b) What wingspan would the plane need to produce 1.00-V emf across its wings?
(c) The plane now reverses direction. Does the polarity of the wingtip emf change? That is, if the left wing was positive before, does it now become negative?
(a) 0.225 V (b) 111. m (c) no polarity change
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What are the two most important properties of a telescope? Select exactly two responses.
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Given 30. ?H and a 60. ? resistor, what range of capacity allows tuning this series circuit to the FM band (88-108 MHz)?
What will be an ideal response?
The most important greenhouse effect gas in our atmosphere is ________
Fill in the blank(s) with correct word