Two point charges each experience a 1-N electrostatic force when they are 2 cm apart. If they are moved to a new separation of 8 cm, what is the magnitude of the electric force on each of them?
A) 2 N
B) 1/2 N
C) 1/4 N
D) 1/8 N
E) 1/16 N
E
Physics & Space Science
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Exclusion Principle: How many unique quantum states correspond to the lowest possible energy level of an electron in the hydrogen atom?
A. 3 B. 0 C. 1 D. 4 E. 2
Physics & Space Science
A 4.00 kg mass is moving in a circular path of radius 4.10 m with a constant angular velocity of 5.00 rad/sec. The centripetal force on the mass is
A. 267 N. B. 294 N. C. 302 N. D. 350 N. E. 410 N.
Physics & Space Science
A simple beam AB with an overhang BC is loaded as shown in the figure. The bending moment at the midspan of AB is approximately:
(A) 8 kN?m
(B) 12 kN?m
(C) 17 kN?m
(D) 21 kN?m
Physics & Space Science
Where did most of the chemical elements that make up our bodies come from?
A) The Sun B) Vanished Stars C) The Big Bang D) Other planets
Physics & Space Science