An airplane is flying horizontally in a region where the earth's magnetic field is 5.2 × 10-5 T downward. If the speed of the plane is 200 m/s and the wing tips are 65 m apart, what is the potential difference between the wing tips?
A)
1.0 × 10-5 V
B)
0.34 V
C)
0.68 V
D)
0
E)
1.0 × 10-2 V
C
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How does the wavelength (in a vacuum) of a high-frequency electromagnetic wave compare with a low-frequency electromagnetic wave?
A) it is impossible to tell because frequency and wavelength are not related B) the lower-frequency wave has the longer wavelength because frequency and wavelength are inversely proportional to each other C) the two waves have the same wavelength because the wavelengths of all electromagnetic waves are the same D) the higher-frequency wave has the longer wavelength because frequency and wavelength are directly proportional to each other
A 2.00-g bullet hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.20-m long string. This causes the block to swing through an arc of 3.50°. What was the speed of the bullet before it hit the block?
A) 16.7 m/s B) 524 m/s C) 25.3 m/s D) 262 m/s E) 789 m/s
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In an RLC series circuit the capacitive reactance is 19.5 ?. If the AC frequency triples, what will be the resulting capacitive reactance?
a. 11.3 ? b. 6.5 ? c. 33.8 ? d. 58.5 ? e. Additional information is need to find the value.