A cube-shaped box is sitting on the floor. The pressure the box exerts on the floor is 235 Pa. If the density of the box is 21.0 kg/m3, what is the length of each side of the box?
a. 0.00910 m
b. 1.14 m
c. 110 m
d. 11.2 m
b
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Coastal upwelling helps to decrease the surface water temperature off the central California coast.
Answer the following statement(s) true (T) or false (F)
Determine the temperature at the four nodes shown in the sketch. Assume steady conditions and two-dimensional heat conduction. The four faces of the square shape are each at different temperatures as shown.
GIVEN
Square shape with four different face temperatures
FIND
Temperature at four interior nodes
SKETCH
The most basic difference between elliptical galaxies and spiral galaxies is that
A) elliptical galaxies lack anything resembling the halo of a spiral galaxy. B) elliptical galaxies have a spheroidal component (of stars distributed spherically about the galactic center), and spiral galaxies do not. C) elliptical galaxies lack anything resembling the disk of a spiral galaxy. D) elliptical galaxies are very old and spiral galaxies are very young.
If the scalar (dot) product of two vectors is negative, it means that
a. there was a calculator error. b. the angle between the vectors is less than 90 degrees. c. the angle between the vectors is 90 degrees. d. the angle between the vectors is greater than 270 degrees. e. the angle between the vectors is between 90 and 180 degrees.