An electron moving in the positive x direction experiences a magnetic force in the positive z direction. If Bx = 0, what is the direction of the magnetic field?
a. negative y direction
b. positive y direction
c. negative z direction
d. positive z direction
e. negative x direction
a
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Hubble's law requires calibration with distances measured by standard candle techniques. Which standard candle technique is best for measuring the distances of very distant galaxies?
What will be an ideal response?
Identify a true statement about the atoms in the Universe
A) Most of the iron in your body was produced by nuclear fission reactions. B) Most of the calcium atoms in your bones were assembled inside stars. C) The iodine atoms were not formed during the violent deaths of rare massive stars. D) The gold and silver atoms are more than 10 billion years old.
If the braking distance for your car at a certain speed is 200 ft and, after reacting to a situation, you have managed to stop your car in 5.0 s, then the magnitude of the acceleration was
A. 16 ft/s2. B. 25 ft/s2. C. 50 ft/s2. D. 32 ft/s2.
The ______________in a composite material is continuous.
Fill in the blank(s) with the appropriate word(s).