Answer the following statement(s) true (T) or false (F)
1. The electric field created by a dipole at an arbitrary point in space around that dipole is always parallel to the dipole’s dipole moment vector.
2. The dipole moment of an electrically polarized atom always points in the same direction as the external field that has polarized it.
1. FALSE
2. TRUE
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A bar magnet is dropped, N pole down, so it falls through a horizontal loop of wire. As it approaches the loop, the induced current (viewed from above) is:
A) clockwise B) counterclockwise C) zero
A spaceship captain lands on an unknown planet. Before venturing forth, he needs to find out the acceleration due to gravity on that planet
All he has available to him is some thin light string, a stopwatch, and a small 2.75-kg metal ball (it was a rough landing). So he lets the ball swing from a 1.5-m length of the string, starting at rest, and measures that it takes 1.9 s for it to swing from the place where he released it to the place where it first stops as it reverses direction. What is the acceleration due to gravity on this planet?
Refer to the figure above. Today's carbon dioxide concentration is about ________ that at any other time in the past 800,000 years.
A) 2 % higher than B) 45% higher than C) double D) 400 times
A 25.0-g string is stretched with a tension of 43.0 N between two fixed points 12.0 m apart. What is the frequency of the second harmonic?
A) 6.00 Hz B) 12.0 Hz C) 18.0 Hz D) 24.0 Hz E) 36.0 Hz