Buoyant force is greater on a submerged 1-cubic centimeter block of
A) lead.
B) aluminum.
C) same on each
Answer: C
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When a certain capacitor carries charges of ±10 µC on its plates, the potential difference cross the plates is 25 V. Which of the following statements about this capacitor are true? (There could be more than one correct choice.)
A) If we double the charges on the plates to ±20 µC, the potential difference across the plates will also double. B) If we double the charges on the plates to ±20 µC, the capacitance of the capacitor will also double. C) If we double the charges on the plates to ±20 µC, the capacitance of the capacitor will not change. D) If we double the charges on the plates to ±20 µC, the potential difference across the plates will decrease by a factor of two.
Liquid crystal displays make use of interference of light
Indicate whether the statement is true or false
What two things are needed to create an emission nebulae?
A) interstellar gas and dust B) hydrogen fusion and helium ionization C) cool stars and much interstellar dust D) hot stars and interstellar gas, particularly hydrogen E) hydrogen gas and carbon dust
In the two-slit experiment, for the condition of dark fringes, the value of m = +2 corresponds to a path difference of 3?/2
Indicate whether the statement is true or false