When a magnetic field causes a charged particle to move in a circular path, the only quantity listed below which the magnetic force changes significantly as the particle goes around in a circle is the particle's:
a. energy.
c. momentum.
b. time to go around the circle once.
d. radius for the circle.
C
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The traditional theory states that the galaxy formed
a. as a large spherical cloud of gas that was rotating very slowly. b. from a large cloud of material that broke off a larger galaxy. c. from material that had been ejected in the violent explosion of a dying galaxy. d. as a result of mergers between several smaller groups of gas, dust, and stars. e. as two massive galaxies collided.
Why do scientists think Titan has an atmosphere while the large moons of Jupiter (Ganymede, Callisto, Europa and Io) do not?
A) The jovian satellites lost their atmospheres because of Jupiter's thermal radiation. B) The jovian satellites never formed atmospheres because the solar nebula was too hot there. C) The jovian satellites had their atmospheres stripped by Jupiter's gravitational pull. D) The jovian satellites experienced too many collisions in their lifetimes to maintain atmospheres. E) Titan got its atmosphere by accreting gases from Saturn. The jovian satellites were competing with one another to do this, so it was unsuccessful for any of them.
What is the wavelength of a photon of energy 2.00 eV?
What will be an ideal response?
State the scale of your topographic map in units of inches per mile; that is, one inch equals how many miles?