The potential applied to a 20. ? resistor is 60. cos (33. t) volts. What is the:
(a) instantaneous current?
(b) rms current?
(a) 3.0 cos (33. t) Amperes
(b) 2.1 Amperes rms
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Orbital electrons do not spiral into the atomic nucleus because of
1) electrical forces, 2) the wave nature of the electrons, 3) angular momentum, 4) the discreteness of energy levels, 5) quantum mechanical laws, and the electrons have discrete radii from the nucleus because 6) the circumference of each orbit is an integral multiple of the electron wavelength. 7) electrical forces act over discrete distances. 8) energy levels themselves are discrete.
Like latitude on Earth, ________ in the sky is measured in degrees north and south of the equator
Fill in the blank(s) with correct word
Three identical point charges (+2.0 nC) are placed at the corners of an equilateral triangle with sides of 2.0-m length. If the electric potential is taken to be zero at infinity, what is the potential at the midpoint of any one of the sides of the triangle?
a. 16 V b. 10 V c. 70 V d. 46 V e. 44 V
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of ?0.40 rad/s2 has an angular velocity of 1.5 rad/s and an angular position of 2.3 rad. What is the angular position of the wheel at t = 2.0 s?
A. 4.9 rad B. 4.7 rad C. 4.5 rad D. 4.3 rad E. 4.1 rad