If the accuracy in measuring the velocity of a particle increases, the accuracy in measuring its position will
A) increase.
B) decrease.
C) remain the same.
D) It is impossible to say since the two measurements are independent and do not affect each other.
B
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Fluorescence occurs when samples of some materials are exposed to rays of which EMR region?
a. Ultraviolet b. Infrared c. Visible d. Microwave
This is the H-R diagram for stars in a 12-billion-year-old globular cluster. Based on our understanding of stellar lives, which of the four labeled stars is currently generating energy through hydrogen fusion in a shell around an inert (nonfusing) helium core?
A) I B) II C) III D) IV
During an adiabatic process, an ideal gas does 25 J of work. What is the change in the internal (thermal) energy of the gas during this process?
A) 0.00 J B) 50 J C) 25 J D) -25 J E) -50 J
A string is stretched with a tension of 120 N. The string has a length of 2.5 meters. The velocity of wave propagation along the string is 220 m/s. The mass per unit length of the string is
a. 
b. 
c. 
d. 
e. 