A charged particle (mass = M, charge = Q > 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with speed V?
a. QVB toward the east
b. Zero
c. QVB toward the west
d. QVB upward
e. QVB toward the south
c
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If the Sun was replaced by a black hole of equal mass, Earth would _____
a. fall into the black hole on a virtually straight path b. spiral in to the black hole over several months c. spiral in to the black hole over the course of several decades d. continue in its normal orbit e. spiral away from the black hole, pushed by gravitational waves
Name three differences between terrestrials and jovian planets
What will be an ideal response?
In the electron-wave model of the atom, an electron in the second energy level contains
A) a single wavelength. B) two wavelengths. C) any number of wavelengths. D) none of the above
A particle (q = 4.0 mC, m = 50 g) has a velocity of 25 m/s in the positive x direction when it first enters a region where the electric field is uniform (60 N/C in the positive y direction). What is the speed of the particle 5.0 s after it enters this region?
A. 49 m/s B. 35 m/s C. 32 m/s D. 44 m/s E. 24 m/s