The circuit below contains 3 100-W light bulbs and a capacitor. The emf is 110 V. Which light bulb(s) is(are) brightest? (Assume the capacitor is fully charged.)
a.
A
b.
B
c.
C
d.
A and B
e.
All three are equally bright.
d
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For a mixture of two different elements A and B, at one atmosphere of pressure three phases are in equilibrium (?, ?, and liquid), and it is desired to keep all three phases in equilibrium. Which of the following statements is true?
(a) If the temperature is changed, the composition of the ?, ?, and liquid phases changes. (b) The composition of the ? phase is changed by adding more A-type atoms. (c) The composition of the liquid phase is changed by adding more A-type atoms. (d) Nothing can be changed.
An electron beam directed through a magnetic field
A) may be deflected. B) may experience a force. C) both of these D) neither of these
Process of Science: The theory of special relativity is one of the most tested theories in physics and has now been completely proven beyond all doubt
Indicate whether the statement is true or false
A 3.0-kg mass sliding on a frictionless surface explodes into three 1.0-kg masses. After the explosion the velocities of the three masses are: (1) 9.0 m/s, north; (2) 4.0 m/s, 30° south of west; and (3) 4.0 m/s, 30° south of east. What was the magnitude of the original velocity of the 3.0-kg mass?
a. 1.7 m/s b. 1.0 m/s c. 1.3 m/s d. 2.0 m/s e. 2.8 m/s