Imagine a single charge q placed on one corner of a square, and that the electric field at the center of the square is F/q. If additional equal charges are placed on the other three corners,
the electric field at the center of the square due to these four equal charges is
A) F/q.
B) 4F/q.
C) F/(2q).
D) F/(4q).
E) none of the above
Answer: E
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When a nucleus emits a beta particle, its atomic number
A) increases by 1. B) decreases by 1. C) increases by 2. D) decreases by 2. E) none of the above
The intensity of radiation reaching the Earth from the Sun is 1350 W/m2 . The Earth's radius is 6.4 × 10^6 m. How big a force does this radiation exert on the Earth? (Assume it is all absorbed.)
a. 5.8 × 10^8 N b. 1.2 × 10^9 N c. 2.3 × 10^9 N d. 4.6 × 10^9 N e. 1.7 × 10^17 N
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s velocity is zero in region(s)
a.
I.
b.
II.
c.
III.
d.
no regions
The graphs below show a voltage phasor at different instances of time. Which voltage phasor shows the instantaneous value of the voltage with the largest magnitude?
a.
b.
c.
d.
