A temperature difference of 10 Celsius degrees is also equal to a temperature difference of 10 on the
A) Fahrenheit scale.
B) Kelvin scale.
C) both of these
D) neither of these
Answer: B
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Electrons are used to produce X-rays by allowing a beam of electrons to strike a heavy metal surface. What is true about the wavelengths of the characteristic X-rays that are produced in such a situation?
A. There is a continuous range of wavelengths produced, up to a maximum that depends on the energy of the electron beam used. B. There is a single wavelength of X-ray produced that depends on the energy of the electron beam used. C. There are a few specific wavelengths that are produced for a given metal and their wavelength is independent of the energy of the electron beam used. D. There is a continuous range of wavelengths produced, down to a minimum that depends on the energy of the electron beam used.
A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is
A) the same as the force on the 1-kg book. B) 5 times as much as the force on the 1-kg book. C) 10 times as much as the force on the 1-kg book. D) zero.
Capacitors in Combination: A 5.0-?F and a 12.0-?F capacitor are connected in series, and the series arrangement is connected in parallel to a 29.0-?F capacitor. How much capacitance would a single capacitor need to replace this combination of three capacitors?
A. 33 ?F B. 13 ?F C. 16 ?F D. 38 ?F
A main-sequence star's luminosity can directly inform us of
A) the star's radius. B) the rate at which it converts hydrogen to helium. C) the star's mass. D) the star's distance from us.