What energy transformation occurs during photosynthesis?
A) radiant E ? chemical E
B) chemical E ? thermal E
C) radiant E ? kinetic E
D) thermal E ? chemical E
E) chemical E ? kinetic E
A
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The nearest star is 1 ly from the solar system
a. True b. False Indicate whether the statement is true or false
Three identical particles labeled A, B, and C enter a region of space where the magnetic field points away from the viewer perpendicular to the plane of the paper in the drawing in the next column. The particles’ velocities have the same magnitude and all lie in the plane of the paper, but they have the different directions shown. Which particle experiences the largest magnetic force? Answer A, B, or C, or choose from the answers below.
A.A
B.B
C.C
D. Both A and C.
E. The force magnitude has the same nonzero magnitude for all three particles.
F. The magnetic force on all three particles is zero.
What makes white-dwarf supernovae very good standard candles for distance measurements?
A) They are very bright, so they can be used to determine the distances to galaxies billions of light-years away. B) They should all have approximately the same luminosity. C) They occur so frequently that we can use them to measure the distances to virtually all galaxies. D) We have had several occur close to us in the Milky Way, so we have been able to determine their luminosities very accurately. E) both A and B
An AC series circuit has 8.00-W resistance, 15.00-W inductive reactance, and 10.00-W capacitive reactance. If an effective (rms) emf of 120 V is applied, what is the effective (rms) current value?
a. 26.0 A c. 9.23 A b. 5.31 A d. 12.7 A