A car with a radio antenna 1.0 m long travels at 80 km/h in a locality where the Earth's magnetic field is 5.0 × 10?5 T. What is the maximum possible emf induced in the antenna as a result of moving through the Earth's magnetic field?
What will be an ideal response?
1.1 mV
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If you move an electron from a lower energy level to a higher energy level, you can call the atom a(n) _____
A) excited atom B) neutral atom C) disassociated atom D) grounded atom
The center of the Milky Way is in _____
A) Sagittarius B) Aquarius C) Perseus D) Libra
A mountain top is an especially good site for infrared telescopes since:
A) there you are closer to celestial objects. B) you are above most of the carbon dioxide and water vapor in the atmosphere. C) the cold weather helps the sensitivity of infrared detectors. D) less air above means better seeing in many cases. E) All of the above are factors.
A ball rolls over the edge of a table with a horizontal velocity v m/s. The height of the table is 1.6 m and the horizontal range of the ball from the base of the table is 20 m. What is the initial speed of the ball?
A) 9.8 m/s B) 20 m/s C) 35 m/s D) 4.9 m/s E) 70 m/s