Which of the following correctly describes what we mean by a great circle on the surface of Earth?
A) any circle of latitude
B) any circle whose center is at the center of Earth
C) any circle larger than 10,000 km in diameter
D) a circle of longitude
B
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Amorphous polymers are _____________subject to mixing with solvents than are crystalline polymers.
Fill in the blank(s) with the appropriate word(s).
If an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount
Indicate whether the statement is true or false
A 12,000-N car is raised using a hydraulic lift, which consists of a U-tube with arms of unequal areas, filled with oil and capped at both ends with tight-fitting pistons
The wider arm of the U-tube has a radius of 18.0 cm and the narrower arm has a radius of 5.00 cm. The car rests on the piston on the wider arm of the U-tube. The pistons are initially at the same level. What is the initial force that must be applied to the smaller piston in order to start lifting the car? For purposes of this problem, neglect the weight of the pistons. A) 727 N B) 926 N C) 2900 N D) 3330 N E) 1.20 kN
There is presently no evidence for large-scale structure bigger than about 200 Mpc
Indicate whether the statement is true or false