Answer:
f = 17.26 Hz
Explanation:
To find the fundamental frequency of the vibration produced by elephants, approaching the trunk as a system closed at one end and open at the other, the fundamental wavelength is
λ = 4 L fundamental
λ = 4L / 3 third harmonic
In this case the melt wavelength is
λ = 4 4.78
λ = 19.12 m
Now let's use the ratio of the speed of sound to the frequency and wavelength
v = λ f
f = v /λ
f = 330 / 19.12
f = 17.26 Hz
This is the lowest frequency elephants can produce
Yes it is a force omg so smart
Answer:
(B) The balls reach the ground at the same instant.
Explanation:
Since it is a projectile motion, the time required to reach the ground is given by
t = √2h/g
Where h is the height from which the balls are thrown and g is the acceleration due to gravity.
Since both of the balls were thrown from the same height and the acceleration of both balls are also same they will reach the ground at the same instant.
Answer:
The kinetic energy of photoelectrons at the surface grows linearly with the increasing frequency of incident radiation. Measurements for all metal surfaces give linear plots with one slope.