Density is
A) proportional to both mass and volume.
B) proportional to mass and inversely proportional to volume.
C) inversely proportional to mass and proportional to volume.
D) inversely proportional to both mass and volume.
E) proportional only to volume.
B
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Consider the following statement, and explain whether or not it is sensible: When I looked into the dark fissure of the Milky Way with my binoculars, I saw what must have been a cluster of distant galaxies
What will be an ideal response?
If the size of the charge value is tripled for both of two point charges maintained at a constant separation, the mutual force between them will be changed by what factor?
a. 9 b. 3 c. 1/3 d. 1/9 e. 1
A lens that is curved inwards at the center on both sides so that the lens has greater thickness at its edges is called
a) a convex lens. b) a refracting lens. c) a converging lens. d) a concave lens.
Which of the following devices makes use of an electromagnet?
a. relay c. both A and B b. motor d. None of the above.