Fourier discovered that music can be
A) a series of non-periodic waves.
B) reduced to simple sine waves.
C) a binary code.
D) pulses of the same amplitude.
Answer: B
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A projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal. What is the location of the projectile 3.00 seconds later?
A. X = 85.0 m, Y = 37.0 m B. X = 117.0 m, Y = 23.4 m C. X = 37.0 m, Y = 117.0 m D. X = 23.4 m, Y = 37.0 m E. X = 85.0 m, Y = 23.4 m
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.
What happens to a particle's wave packet when a highly accurate position measurement is performed?
A) It suddenly makes a transition into a state of smaller uncertainty in position, with no change in its uncertainty in velocity. B) It makes a gradual transition to a state of greater uncertainty in position but smaller uncertainty in velocity. C) It makes a gradual transition to a state of smaller uncertainty in position and greater uncertainty in velocity. D) It suddenly makes a transition into a state of greater uncertainty in position but smaller uncertainty in velocity. E) It suddenly makes a transition into a state of smaller uncertainty in position and greater uncertainty in velocity.
Radioactivity Basics: In the radioactive decay equation 
? 
Th + X, what is X?
What will be an ideal response?