What is the difference between 105.3 and 101.12?
A)
4
B)
4.2
C)
4.18
D)
4.180
E)
4.1800
B
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An alpha particle (charge = +2e) is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the alpha particle when it is at a distance of 2 × 10^?14 m away from the gold nucleus? (e = 1.6 × 10^?19 C)
A conclusion of the Michelson-Morley experiments was that
A. interference of EM-waves does not happen. B. the ether doesn't exist. C. Galilean relativity holds. D. light has momentum. E. light has no momentum.
A 2.0-C charge moves with a velocity of (
m/s and experiences a magnetic force of 
N. The x component of the magnetic field is equal to zero. Determine the z component of the magnetic field.
A. ?3.0 T B. +3.0 T C. +5.0 T D. ?5.0 T E. +6.0 T
Two identical airplanes are executing identical turns around a pylon. One of them is moving at 200 mph, and the other is moving at 100 mph. The centripetal force acting on the airplane moving at 200 mph is __________ the value of the centripetal force acting on the airplane moving at 100 mph
a. one quarter b. one half c. the same as d. twice e. four times