Answer:
if the frequency is double, the wavelength is only half as long
Explanation:
Echoes occur when a reflected soundwave reaches the ear more than 0.1 seconds after the original sound wave was heard. ... There will be an echoinstead of a reverberation. Reflection of sound waves off of surfaces is also affected by the shape of the surface.
(mark as brainly please)
Answer:
B
Explanation:
because when they are in opposite direction we subtract so 10N-10N=0 the second one is in the same direction so we simply add the 2 numbers so 10N+10N=20N the last one is as the same as the first picture we subtract 10N-8N=2N
At the release point, the ball has kinetic energy,

and at its maximum height it has potential and kinetic energy,

where
is the maximum height attained above the release point.
The LoCoE tells us that we should have



