A string tied between two post is oscillating at 3Hz. A student determines the standing waves have a length of 4 meters. What is
1 answer:
Answer:
12 m/s
Explanation:
Standing waves are waves that are formed between two fixed points in space, so they cannot propagate, but they are just oscillations about a fixed points. Examples of standing waves are the waves in a string.
The relationship between wavelength, frequency and speed of a wave is given by the wave equation:
where
v is the speed of the wave
f is its frequency
is its wavelength
For the standing wave in this problem we have:
f = 3 Hz is the frequency of the wave
is the wavelength
Solving for v, we find the velocity of the wave:
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Answer
given,
wavelength of the red light,λ = 687 nm
wavelength of the yellow light = 582 nm
Frequency of red light
=
=
= 4.36 x 10¹⁴ Hz
frequency of the yellow light
=
= 5.15 x 10¹⁴ Hz
speed of the car
v_r is the required speed.
v_r = 0.19 c
v_r = 0.19 x 3 x 10⁸ =5.7 x 10⁷ m/s
1 m/s = 2.23694 mile/hr
v_r = 1.27 x 10⁸ mile/hr
if the light is actually yellow
f₀ = 5.15 x 10¹⁴ Hz
f = 6.13 x 10¹⁴ Hz
wavelength corresponding to this frequency is wavelength = 493.2 nm
hence, the color corresponding to this wavelength is Green.
Answer:
Parabolic motion
Explanation:
It is given that,
Speed with which a baseball is launched through the ar, v = 37 m/s
Angle of projection,
We know that when an object is projected with some initial speed having some angle of projection, the path followed by the object is called projectile motion. The object will act as a projectile here. As a result the shape of the trajectory will be parabolic.
The equation of parabolic path is given by :
It is similar to,
which is the equation of parabola
Hence, this is the required solution.