State the first postulate of the special theory of relativity (relativity principle)
What will be an ideal response?
The laws of physics have the same form in all inertial reference frames.
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A particle moving along the x axis has a position given by x = 54t ? 2.0t3 m. At the time t = 3.0 s, the speed of the particle is zero. Which statement is correct?
a. The particle remains at rest after t = 3.0 s. b. The particle no longer accelerates after t = 3.0 s. c. The particle can be found at positions x < 0 m only when t < 0 s. d. All of the above are correct. e. None of the above is correct.
Series/Parallel Circuits: Three resistors of resistances 4.0 ?, 6.0 ?, and 10 ? are connected in parallel. If this combination is now connected in series with an ideal 12-V battery and a 2.0-? resistor, what is the current through the 10-? resistor?
A. 0.59 A B. 2.7 A C. 11 A D. 16 A
Two blocks, M = 2m, sit on a horizontal frictionless surface with a compressed massless spring between them
A thin infinitely large current sheet lies in the y-z plane. Current of magnitude Js per unit length along the z axis travels in the y-axis direction, which is up out of the page. Which diagram below correctly represents the direction of the magnetic field on either side of the sheet?
a.
b.
c.
