A proton is projected with a velocity of 7.0 km/s into a magnetic field of 0.60 T perpendicular to the motion of the proton. What is the magnitude of the magnetic force that acts on the proton? (e = 1.60 × 10-19 C)
A) 13 × 10-16 N
B) 6.7 × 10-16 N
C) 0 N
D) 3.4 × 10-16 N
E) 4.2 × 10-16 N
B
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Scientists believe Saturn's moon Phoebe originated from a ____
a. large impact on Titan broke off a piece b. captured Kuiper belt object c. captured asteroid from the asteroid belt d. planetesimal that did not differentiate e. Galilean moon with an orbit that crossed into Saturn's orbit
This graph plots planetary mass on the horizontal axis and planetary radius on the vertical axis. Which of the four points marked by one of the bold numbers 1 through 4 represents a planet with the greatest density?
A) Point 1 B) Point 2 C) Point 3 D) Point 4
In the shear mode II of fracture, the crack propagates _________to the forces that produce the shear stress.
What will be an ideal response?
Why isn't the space within our solar system or the Milky Way expanding according to Hubble's law?
A) Hubble's law only applied early in the history of the universe. B) As we are inside our solar system and the Milky Way, we cannot observe their expansion. C) The universe is not old enough for the solar system or Milky Way to have begun their expansion. D) The gravity exerted by the solar system and the Milky Way is strong enough to hold them together against the expansion of the universe.