A single conservative force Fx = (6.0x ? 12) N (x is in m) acts on a particle moving along the x axis. The potential energy associated with this force is assigned a value of +20 J at x = 0 . What is the potential energy at x = 3.0 m?
a. +11 J
b. +29 J
c. +9.0 J
d. ?9.0 J
e. +20 J
b
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The heliocentric model was actually first proposed by:
A) Aristotle. B) Archimedes. C) Aristarchus. D) Alexander the Great. E) Hipparchus.
____ are located beyond the asteroid belt (3 AU) from the sun, have extremely large masses and very low densities
a. Comets b. Extrasolar planets c. Asteroids d. Terrestrial planets e. Jovian planets
A Michelson interferometer is used to measure the thickness of a thin film with light of wavelength 560 nm. If the introduction of the film into one of the arms of the interferometer causes a change in the interference pattern by exactly 79 bright fringes, what is the thickness of the film? The film’s index of refraction is 1.39.
A. 56.0 microns B. 113 microns C. 56.7 microns D. 112 microns E. 15.9 microns F. 15.7 microns
At what temperature is the average kinetic energy of an atom in helium gas equal to 6.21 × 10-21 J?
What will be an ideal response?