Particle 1 with charge q1, and particle 2, with a charge q2, are on the x axis, with particle 1 at x = a with and particle 2 at x = -2a. For the net force on a third charged particle, at the origin to be zero q1 and q2 must be related by q2=:
A) 2q1
B) 4q1
C) -2q1
D) -4q1
E) -q1/4
B) 4q1
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A non-uniform meter stick is found to balance on a knife edge at the 60-cm mark. Where is the center of gravity of the meter stick?
A. at the 40-cm mark B. at the 45-cm mark C. at the 50-cm mark D. at the 55-cm mark E. at a position not given
Exhibit 12-1
The figure below shows a graph of angular velocity versus time for a woman bicycling around a circular track.
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Use this exhibit to answer the following question(s).
Refer to Exhibit 12-1. How many revolutions does she complete in the first 12 minutes?
A. 4 B. 8 C. 12 D. 16 E. 32
A cylinder contains 23 moles of an ideal gas at a temperature of 300 K. The gas is compressed at constant pressure until the final volume equals 0.43 times the initial volume
The molar heat capacity at constant volume of the gas is 24.0 J/mol ยท K and the ideal gas constant is R = 8.314 J/mol ? K. The heat absorbed by the gas is closest to A) -130 kJ. B) -94 kJ. C) 130 kJ. D) 94 kJ. E) -33 kJ.
In which of the following energy level transitions for a hydrogen atom is a photon emitted?
a. n = 1 to n = 2 b. n = 3 to n = 2 c. n = 2 to n = 1 d. n = 1 to n = 4 e. n = 4 to n = 3