A small object with a 5.0-?C charge is accelerating horizontally on a friction-free surface at 0.0050 m/s2 due only to an electric field. If the object has a mass of 2.0 g, what is the magnitude of the electric field?
A) 2.0 N/C
B) 4.0 N/C
C) 0.0020 N/C
D) 0.0040 N/C
E) 1.0 N/C
A
You might also like to view...
A melon is projected into the air with 100 J of kinetic energy in the presence of air resistance. When it returns to its initial level its kinetic energy is
A) less than 100 J. B) more than 100 J. C) 100 J. D) need more information
When a positronium atom (electron + positron) decays, it emits two photons. What are the energies of the photons?
A) 0.511 MeV and 1.022 MeV B) 0.225 MeV and 1.022 MeV C) 0.225 MeV and 0.285 MeV D) 0.256 MeV and 0.256 MeV E) 0.511 MeV and 0.511 MeV
A train slowly climbs a 400-m mountain track which is at an angle of 8.0° with respect to the horizontal. How much altitude does it gain?
a. 55.7 m b. 200 m c. 60.7 m d. 396 m e. 400 m
Which of these statements about electron energy levels in hydrogen atoms is true?
A. An electron with a positive total energy is a bound electron. B. The orbital angular momentum of an electron in the ground state is zero. C. An electron in the hydrogen atom is best represented as a traveling wave. D. An electron in state n can make transitions only to the state n + 1 or n - 1.