John and Linda are arguing about the definition of density. John says the density of an object is proportional to its mass. Linda says the object's mass is proportional to its density and to its volume. Which one, if either, is correct?
a. They are both wrong.
b. John is correct, but Linda is wrong.
c. John is wrong, but Linda is correct.
d. They are both correct.
e. They are free to redefine density as they wish.
d
You might also like to view...
What is the primary practical difficulty that limits the use of Hubble's law for measuring distances?
A) Redshifts of galaxies are difficult to measure. B) The recession velocities of distant galaxies are so great that they are hard to measure. C) We do not know Hubble's constant very accurately yet. D) Hubble's law is only useful theoretically; it is difficult to use in practice. E) The motion of Earth relative to the Milky Way is difficult to account for.
If you double the spring constant of a harmonic oscillator, the oscillation frequency does what?
A. Decreases by a factor of 2.
B. Decreases by a factor of 
.
C. Does not change.
D. Increases by a factor of .
E. Increases by a factor of 2.
F. Changes by some other factor (specify).
The following three appliances are connected to a 120-V house circuit: i) toaster, 1 325 W, ii) coffee pot, 650 W, and iii) microwave, 600 W. If all were operated at the same time, what total current would they draw?
a. 2.10 A b. 47.5 A c. 7.15 A d. 21.5 A e. 11.0 A
A circular orbit would have an eccentricity of:
A) 0. B) between 0 and 0.5. C) between 0.5 and 1. D) exactly 1.0. E) infinity.