<span>Hich would increase the speed of a sound wave? Check all that apply. where are the answer chices?</span>
Answer:
0N
Explanation:
Parameters given:
Q1 = Q2 = Q3 = 100 * 10^(-9) C
r = 0.3 m
The net force on the middle charge is:
F = F(1,2) + F(2,3)
Where F(1,2) = force due to Q1 on Q2
F(2,3) = force due to Q3 on Q2
F(1,2) = k*Q(1)*Q(2)/r²
F(1,2) = [9 * 10^9 * 100 * 10^(-9) * 100 * 10^(-9)]/(0.3²)
F(1,2) = 0.001N
F(2,3) = k*Q(2)*Q(3)/r²
F(2,3) = [9 * 10^9 * 100 * 10^(-9) * -100 * 10^(-9)]/(0.3²)
F(2,3) = -0.001N
Therefore,
F = 0.001 - 0.001
F = 0N
when you do positive work on an object, you ______
A. decrease the object's energy
<u>B. keep the object's energy the same
</u>
C. increase the object's energy
D. may increase or decrease the object's energy
Answer:
The answer is
A. Incident rays that are parallel to the central axis are dispersed but will be perceived as originating from a point on the near side of the mirror.
Explanation:
The images formed by a convex mirror is virtual, diminished and images are always formed between the Focal point and the pole of the mirror.
Convex mirrors are used as car driving mirrors because they form upright images and also give wider field of view (dispersed) , and notice that in the car driving mirrors there is a warning "objects appear closer than they are "
Which explains our answer, that images are perceived from a near side
