The component of the electric field in any direction is equal to the negative of the rate of change of the electric potential with distance in that direction
Indicate whether the statement is true or false
TRUE
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The gravitational interaction was the first force figured out by scientist Sir Isaac Newton. However,
A. it is not a fundamental force of nature, only a symptom of inertia. B. gravitation has been the hardest force to unite with electroweak and strong nuclear interactions. C. until we can detect gravitational waves, it will remain a mystery. D. it will never be incorporated into a "theory of everything" because it is an attractive force.
Hubble's Law (also known as the Hubble-Lemaitre Law) can be restated as:
A. The mass-to-light ratio of a spiral galaxy is greater if its rotational velocity is also greater. B. The more distant a galaxy, the faster it is receding. C. The rotation curve of a galaxy is related to the amount of mass inside. D. The velocity curves of spiral galaxies only make sense if there exists a lot of unseen matter.
Monochromatic light of wavelength 500 nm is incident normally on a grating. If the third-order maximum of the diffraction pattern is observed at 32.0°, what is the total number of maxima can be seen?
A) 5 B) 7 C) 10 D) 11 E) 8
A 2.5-kg object falls vertically downward in a viscous medium at a constant speed of 2.5 m/s. How much work is done by the force the viscous medium exerts on the object as it falls 80 cm?
a. +2.0 J b. +20 J c. ?2.0 J d. ?20 J e. +40 J