Newton's principles of mechanics are important because
A) they tie together [or "explain"] a wide range of observed phenomena.
B) of the influential role they played in the development of science during the 14th and 15th centuries.
C) no exceptions have ever been found to them.
D) Actually they are of little importance, due to their limited range of validity.
E) Actually they are now known to be incorrect and hence are of no real scientific importance today.
A
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When an atom loses an electron, it becomes
A) sublimated. B) dissociated. C) a plasma. D) an isotope. E) ionized.
Light spreads out when it passes through a narrow slit because of
a. interference. b. diffraction. c. specular reflection. d. diffuse reflection. e. polarization.
According to the law of poles, like poles ______________
Fill in the blank(s) with correct word
The image of an object placed 20 cm in front of a concave mirror of focal length 10 cm will be
A. real and erect. B. virtual and inverted. C. virtual and erect. D. real and inverted.