The nucleus of an atom is made up of which of the following?
a. electrons and protons
b. electrons and neutrons
c. protons, electrons and neutrons
d. protons and neutrons
d
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How fast would a light beam appear to Einstein if he were traveling in the same direction at 90% of the speed of light?
A) 0 B) c C) 0.1c D) 1.10c E) none of the above
An object of mass m is on the surface of the Earth. The distance to the Sun and the Moon are dS and dM, and the masses of the Sun and Moon are MS and MM. What is the ratio of the gravitational force from the Sun to that of the Moon on the object?
a. MSMM /dSdM b. MSMM /d2Sd2M c. MSd2M /MMd2M d. MMd2S /MSd2M
Which is more energetically favorable, biogas or ethanol? Does your answer differ at different places? Explain
What will be an ideal response?
Radio waves are reflected by which of the following ion layers?
a. C b. D c. F d. A