A hiker walks 200 m east and then walks 100 m north. In what direction is her resulting displacement?
a. north
c. northeast
b. east
d. None of the answers is correct.
D
You might also like to view...
Copernicus proposed his theory because
A) he thought that Ptolemy's theory was too messy and that his was more "fitting." B) it was obvious to most educated people by that time that Earth orbits the sun. C) Ptolemy's theory was known to be wrong. D) it was more in line with Church thinking than was the pre-Christian Greek theory. E) it fit the data taken by Tycho Brahe.
An electrical generating plant operates at a boiler temperature of 218°C and exhausts the unused heat into a nearby river at 24°C. What is the maximum theoretical efficiency of the plant? (0°C = 273 K)
a. 16% b. 62% c. 63% d. 40% e. 73%
Which of the following statements is true about the very early universe (within the first three minutes)?
In a colliding-beam experiment, protons moving at 0.800 c in opposite directions strike one another. What is the speed of the incoming proton as viewed by the proton about to be hit?
A. 1.60 c B. 0.00 C. 0.640 c D. 0.976 c E. 0.960 c