A soda straw is stuck into water at an angle of 36° to the vertical. Looking straight down, what does the angle of the submerged portion of the straw to the vertical appear to be?
44°
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If dark matter were to be found on this planet it would likely be
A) high in our atmosphere. B) within our oceans. C) within Earth's mantle. D) at the center of Earth's core.
A 5.0-kg object is suspended by a string from the ceiling of an elevator that is accelerating downward at a rate of 2.6 m/s2. What is the tension in the string?
A. 49 N B. 36 N C. 62 N D. 13 N E. 52 N
A spherical ball of lead (density 11.3 g/cm3 ) is placed in a tub of mercury (density 13.6 g/cm3). Which answer best describes the result?
A) The lead ball will float with about 83% of its volume above the surface of the mercury. B) The lead ball will float with its top exactly even with the surface of the mercury. C) The lead ball will float with about 17% of its volume above the surface of the mercury. D) The lead will sink to the bottom of the mercury. E) none of the above
Tides are caused by
a. the gravitational pull of the Moon and the Sun. b. Earth's rotation. c. the Moon keeping the same face toward Earth. d. none of these.