You are trying to cross a river that flows due south with a strong current. You start out in your motorboat on the west bank desiring to reach the east bank directly east from your starting point. You should head your motorboat
A)
due east.
B)
due north.
C)
due south.
D)
in a southeasterly direction.
E)
in a northeasterly direction.
E
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The ____ of an object is a measure of the amount of matter it contains. On the other hand ____ is a measure of the gravitational force on an object
a. weight; mass b. mass; weight c. energy; force d. force; energy e. momentum; energy
Lenz's Law: A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held above the center of the coil with its south pole downward. The magnet is released from rest and falls toward the coil. As viewed from above, what is the direction of the current induced in the coil as the magnet approaches the coil?
A. counterclockwise B. clockwise C. No current is induced in the coil. D. An emf but no current is induced in the coil.
Which force field can both accelerate an electron and change its speed?
A) electric field. B) magnetic field. C) both of these D) none of the above
If the energy of n = 6 is –0.378 eV and that of n = 5 is –0.544 eV in a hydrogen atom, a transition from n = 6 to n = 5 will _______________ a photon with an energy of approximately ______________
a. absorb; 0.922 eV b. emit; 0.166 eV c. absorb; 0.166 eV d. emit; 0.922 eV