Answer : diffraction
Explanation : Diffraction is the phenomenon of bending of sound waves around the small openings or obstacles.
Tierra is playing in her backyard when she hears her friend calling out to her. Tierra can hear her friend even when she can't see her. This is because the sound is spreading out from the small openings and hence diffraction of sound wave occurs.
Answer:
a) It reduces the kinetic energy loss of the stunt person.
To solve this problem we will apply the concepts related to wavelength, as well as Rayleigh's Criterion or Optical resolution, the optical limit due to diffraction can be calculated empirically from the following relationship,
Here,
= Wavelength
d= Diameter of aperture
= Angular resolution or diffraction angle
Our values are given as,
The frequency of the sound is
The speed of the sound is
The wavelength of the sound is
Here,
v = Velocity of the wave
f = Frequency
Replacing,
The diffraction condition is then,
Replacing,
d = 0.24 m
Therefore the diameter should be 0.24m
Answer:
v = 44m/s
Explanation:
Using the equation of motion
v = u + at
Because it's under gravity
v = u + gt , where
v = final velocity
u = initial velocity
g = acceleration due to gravity
t = time taken
From the question
v=?
u = 15m/s
g = 9.81m/s²
t = 3s
Therefore v = u + gt
v = 15 + 9.81(3)
v = 15 + 29.43
v = 44.43m/s
Approximating to nearest whole number
v = 44m/s
I hope this was helpful, please mark as brainliest
Answer:
time is something we made as a quntity to measure how long it take to do something or The concept of time is self-evident. An hour consists of a certain number of minutes, a day of hours and a year of days. Time is represented through change, such as the circular motion of the moon around Earth. The passing of time is indeed closely connected to the concept of space
Explanation: