Answer:
A
Explanation:
When you pull the string the weight will experience a downward force and come closer to the vertical tube. And the angle between weight and hand through string is decreased so the angular velocity decreases
The answer is B. It is measured in amperes.
Answer:
y(x, t) = A Sin(ωt ± kx)
Explanation:
Waves can be classifies as either stationary (standing), or progressive (travelling). A progressive wave is one the is a traveling wave, transferring energy along its path. While a stationary wave seems not to be moving.
The general equation for a progressive wave is;
y(x, t) = A Sin(ωt ± kx)
Where: A is its amplitude, t is the time, k is the wave number.
When the wave travels in the positive x-axis direction, the equation changes to;
y(x, t) = A Sin(ωt - kx)
When it travels in the negative x- axis direction, the equation becomes;
y(x, t) = A Sin(ωt + kx)
NB: ω = 2
f and k = 2
/λ.
It is because the moon is not actually parallel with the earth. This may not be the full answer...