A photon of blue light has ________ a photon of red light.
A. the same energy as
B. more energy than
C. less energy than
Answer: B
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Imagine a small magnet (with its north pole vertically upward) passing near the north pole of an external magnet that is below the small magnet. In what direction does the net force acting on the magnet point?
A. Upward. B. Downward. C. There is zero net force. D. None of the above (explain).
The observed temperature difference between the northern and southern hemispheres of Uranus:
A) is dozens of Kelvins. B) is hundreds of Kelvins. C) varies greatly. D) is about 10 Kelvin.
The highest frequency and highest energy band of the electromagnetic spectrum is the ___________________ band
Fill in the blank(s) with correct word
An electron moves with a speed of 5.0 × 104 m/s perpendicular to a uniform magnetic field of magnitude 0.20 T. What is the magnitude of the magnetic force on the electron? (e = 1.60 × 10-19 C)
A) 2.6 × 10-24 N B) 5 × 10-20 N C) 4.4 × 10-14 N D) 1.6 × 10-15 N E) zero