A gas expands at constant temperature from an initial volume of 0.040 m3 and an initial pressure of 210 kPa until its pressure drops to 135 kPa. How much work is done by the system?
A) 3.0 kJ
B) 3.7 kJ
C) 4.1 kJ
D) 5.6 kJ
E) 7.9 kJ
B
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Sue is traveling toward you at 90 km/hr. She throws a baseball that, according to her, is going at 90 km/hr in the opposite direction. What do you see the ball doing?
A) You see the ball traveling away from you at 90 km/hr. B) You see the ball remaining stationary. C) You see the ball traveling away from you at 180 km/hr. D) You see the ball traveling toward you at 90 km/hr. E) You see the ball traveling toward you at 180 km/hr.
Newton's laws of motion apply only to objects experiencing the force of gravity. They do not apply to objects experiencing a magnetic force.
Answer the following statement true (T) or false (F)
A series RLC circuit connected across an ac voltage source will have a positive value of the phase angle at high frequencies
Indicate whether the statement is true or false
Under what circumstances would a nonzero vector lying in the xy plane have components that are equal in magnitude?
1.This can never happen. 2.Always. Components of vectors are always equal in just two dimensions. 3.Only when the vector lies on the x- or y-axes (0°, 90°, 180°, or 270°). 4.Only when the vector lies 45° from the x- or y-axes (45°, 135°, 225°, or 315°).