A block slides down a frictionless inclined ramp
If the ramp angle is 17.0° above the horizontal and the length of the surface of the ramp is find the speed of the block as it reaches the bottom of the ramp, assuming it started sliding from rest at the top. Also assume no air resistance.
A) 10.7 m/s
B) 114 m/s
C) 7.57 m/s
D) 19.6 m/s
A
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A student has made the statement that the electric flux through one half of a Gaussian surface is always equal and opposite to the flux through the other half of the Gaussian surface. This is
a. never true. b. never false. c. true whenever enclosed charge is symmetrically located at a center point, or on a center line or centrally placed plane. d. true whenever no charge is enclosed within the Gaussian surface. e. true only when no charge is enclosed within the Gaussian surface.
Assume that the tile vectors for tiles on the surface shown below point toward us. What is the sign of the current i that flows through this surface?
A. The signed current i is positive.
B. The signed current i is negative.
C. The signed current i is zero.
D. One cannot determine i’s sign from what is given.
You need an inductor that will store 20 J of energy when a 3.0-A current flows through it. What should be its self-inductance?
A) 4.4 H B) 90 H C) 3.7 H D) 60 H
The heat index accounts for the "real feel" due to the effects of
a. temperature and perspiration. b. temperature and pressure. c. temperature and humidity. d. humidity and pressure.