Which of these electromagnetic waves have the shortest wavelength?
A) radio waves
B) infrared waves
C) X-rays
D) ultraviolet waves
E) light waves
Answer: C
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Using current spacecraft, how long would it take to reach the nearest stars?
A) hundreds of thousands of years B) millions of years C) only a few years D) thousands of years
The basic function of a carburetor of an automobile is to atomize the gasoline and mix it with air to promote rapid combustion. As an example, assume that 30 cm3 of gasoline is atomized into N spherical droplets, each with a radius of 2.0 × 10^?5 m. What is the total surface area of these N spherical droplets?
In any process, the total ________ in all parts of the universe increases or remains constant.
Fill in the blank(s) with the appropriate word(s).
The energy of a photon is proportional to
A. its polarization. B. its wavelength. C. its frequency. D. its mass.