How many alpha particles are emitted in the series of radioactive decay events from a U-238 nucleus to a Pb-206 nucleus?
A) 32
B) 16
C) 8
D) 4
Answer: C
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A 160 lb person has a mass of 160/32 = 5 slugs. A 160-lb person steps into an elevator and stands on a bathroom scale. Determine the scale reading for the given scenarios. The elevator is accelerating downwards at 2 ft/s2
a. 150 lb b. 160 lb c. 170 lb d. none of the above
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = ?40 pC and Q = +30 pC, determine the net flux through a spherical surface (radius = 1.0 m) centered on the origin
a. ?9.6 N / m2/C b. ?6.8 N / m2/C c. ?8.5 N / m2/C d. ?4.5 N / m2/C e. ?1.1 N / m2/C
The discoverer of X-rays was
A) Bragg. B) von Laue. C) Fermi. D) Roentgen. E) Xavier.
A particle (m = 20 mg, q = -5.0 mC) moves in a uniform electric field of 60 N/C in the positive x direction. At t = 0, the particle is moving 25 m/s in the positive x direction and is passing through the origin. How far is the particle from the origin at t = 2.0 s?
a. 80 m b. 20 m c. 58 m d. 10 m e. 30 m