A U-tube is partially filled with water and then an immiscible liquid is added to the right side. The top of the liquid is a distance h1 above the level of interface between the liquid and water. On the left side of the tube the top of the water is a distance h2 above the liquid-water interface on the right side. What is the density of the liquid in terms
of the density of water .
a.
b
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The capacitive reactance of an RLC circuit is 64 If the frequency is doubled, what is the new capacitive reactance?
A. 18
B. 64
C. 32
D. 8.0
E. 4.0
A satellite is in a circular orbit about the Earth at an altitude at which air resistance is negligible. Which of the following statements is true?
a. There is only one force acting on the satellite. b. There are two forces acting on the satellite, and their resultant is zero. c. There are two forces acting on the satellite, and their resultant is not zero. d. There are three forces acting on the satellite. e. None of the preceding statements are correct.
The number of technological civilizations in our galaxy is limited by
a. the number of stars in our galaxy b. the fraction of stars with planets c. the number of planets per star in habitable zone longer than a few billion years d. the fraction of suitable planet where technical life forms evolve. e. All of the above.
Calculate the linear speed due to the Earth's rotation for a person at a point on its surface located at 30o N latitude. The radius of the Earth is 6.40 × 10^6 m
a. 299 m/s c. 403 m/s b. 233 m/s d. 465 m/s