A transverse wave, frequency 15.0 Hz, travels along a string. Distance between a crest and an adjacent trough is 3.50m. What is its wavelength?

3.50m

Explanation:

the wavelength of a wave is the distance between the crest and the adjacent trough

the highest part of a wave is called the crest and the lowest part is called a trough

when the distance between the crest and the trough is vertical it is called the wave height and when its between two adjacent crests or troughs its called a wave length as well

therefore, the wavelength of the transverse wave is 3.5m

Wavelength is 7.0m

Explanation:

For a wave, while the vertical distance between its crest and trough is its wave height, the horizontal distance between two adjacent crests or troughs is its wavelength.

Do not forget that the point where the wave has the maximum height is its crest while the point where it has its minimum height.

From the foregoing, the horizontal distance between a crest and an adjacent trough will be equal to half of the wavelength (horizontal distance between two adjacent troughs or crests).

Therefore, from the question, the distance (horizontal) between a crest and an adjacent trough which is 3.50m is half of the wavelength of the wave. This implies that the wavelength of the wave is 7.0m

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.

none, its a machine