15) A 328-kg car moving at 19.1 m/s in the +x direction hits from behind a second car moving at 13 m/s in the same direction. If
1 answer:
You might be interested in
Answer:
(A) The wavelength of this wave is .
(B) The amplitude of this wave is .
Explanation:
Refer to the diagram attached. A point on this wave is at a crest or a trough if its distance from the equilibrium position is at a maximum.
The amplitude of a wave is the maximum displacement of each point from the equilibrium position. That's the same as the vertical distance between the crest (or the trough) and the equilibrium position.
- On the diagram, the distance between the two gray dashed lines is the vertical distance between a crest and a trough. According to the question, that distance is
for the wave in this rope.
- On the other hand, the distance between either gray dashed line and the black dashed line is the distance between a crest (or a trough) and the equilibrium position. That's the amplitude of this wave.
Therefore, the amplitude of the wave is exactly the vertical distance between a crest and a trough. Hence, for the wave in this question,
.
The wavelength of a transverse wave is the same as the minimum (horizontal) distance between two crests or two troughs. That's twice the horizontal distance between a crest and a trough in the same period.
.
Answer:
Explanation:
The magnitude of the magnetic field on the axis of the ring is given by:
is the permeability of free space,
is the flowing current through the ring,
is the ring's radius and
is the distance to the center of the ring.
The flowing current through the ring is defined as the ring's charge divided into the time taken by the charge to complete one revolution, that is, the period . So, we have:
Now, replacing in (1):