An electron, moving south, enters a magnetic field. Because of this field, the electron curves upward. We may conclude that the magnetic field must have a component
A) downward.
B) towards the east.
C) towards the north.
D) upward.
E) towards the west.
E
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The segment of wire (total length including portions of incoming and outgoing wire = 6R) is formed into the shape shown and carries a current I. What is the magnitude of the resulting magnetic field at the point P?
a.
Which of the following species is the reducing agent?
2 CuBr ? 2Cu + Br2 A) Cu B) CuBr C) Cu+ D) Br- E) Br2
Does the average distance that a neutron travels through fissionable material before escaping increase or decrease when two pieces of fissionable material are assembled into one piece?
Does this assembly increase or decrease the probability of an explosion? A) The average distance increases while the probability of an explosion also increases. B) The average distance decreases while the probability of an explosion decreases. C) The average distance increases while the probability of an explosion decreases. D) The average distance decreases while the probability of an explosion increases.
A river has a steady speed of 0.30 m/s. A student swims downstream a distance of 1.2 km and returns to the starting point. If the student swims with respect to the water at a constant speed and the downstream portion of the swim requires 20 minutes, how much time is required for the entire swim?
a. 50 minutes b. 80 minutes c. 90 minutes d. 70 minutes e. 60 minutes