Answer:
because it has no balance
Answer:
Explanation:
f
=
v
λ
where v is the velocity of the wave
λ
is the wavelength.
Answer:
In 2.748 sec the mailbag reached the ground
Explanation:
We have given height from the ground ![h=3.25t^3](https://tex.z-dn.net/?f=h%3D3.25t%5E3)
At t =2.25 sec helicopter releases a small mailbag so at t = 2.25 sec height from the ground ![h=3.25t^3=3.25\times 2.25^3=37.01m](https://tex.z-dn.net/?f=h%3D3.25t%5E3%3D3.25%5Ctimes%202.25%5E3%3D37.01m)
When the mail box is drooped its initial velocity would zero so u = 0 m/sec
Acceleration due to gravity ![g=9.8m/sec^2](https://tex.z-dn.net/?f=g%3D9.8m%2Fsec%5E2)
According to third law of motion ![h=ut+\frac{1}{2}gt^2](https://tex.z-dn.net/?f=h%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dgt%5E2)
![37.01=0\times t+\frac{1}{2}\times 9.8\times t^2](https://tex.z-dn.net/?f=37.01%3D0%5Ctimes%20t%2B%5Cfrac%7B1%7D%7B2%7D%5Ctimes%209.8%5Ctimes%20t%5E2)
![t^2=7.553](https://tex.z-dn.net/?f=t%5E2%3D7.553)
t = 2.748 sec
Answer:
yes
Explanation:
<em>A critical period?
</em>
<em>A.begins and ends abruptly
</em>
<em>B.begins and ends gradually
</em>
<em>C.is unaffected by stimuli
</em>
<em>D.is unlikely to impact development</em>
<em>correct answer (A.begins and ends abruptly
)</em>