Magnet A has twice the magnetic field strength of Magnet B and at a certain distance pulls on magnet B with a force of 100 N. The amount of force that magnet A exerts on magnet B is
A) at or about 50 N.
B) exactly 100 N.
C) need more information
Answer: B
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In a/an ____________ binary, the orbits of both stars can be mapped
Fill in the blank(s) with correct word
Polarization: The following items are positioned in sequence: A source of a beam of natural light of intensity I0, three ideal polarizers A, B, and C; and an observer. Polarizer axis angles are measured clockwise from the vertical, as viewed by the observer. The axis angle of polarizer A is set at 0° (vertical), and the axis angle of polarizer C is set at 50°. Polarizer B is set so that the beam intensity at the observer is a maximum. What is the axis angle settings of polarizer B?
A. 0° B. 25° C. 50° D. 75° E. 100°
Voids are
A. spaces between stars. B. regions in the centers of galaxies containing many black holes. C. spaces between galaxies within a cluster. D. huge regions of space with few or no galaxies.
If the momentum of a particle is doubled, what happens to its de Broglie wavelength?
A. it doubles B. it halves C. it slightly more than doubles D. it becomes slightly less than half E. it decreases by a factor of 2-1/2