The sound produced is called wheezing. It is somewhat like a whistle except it's more course and you don't do it voluntarily like whistling, but rather it occurs because of obstructions. It can be either vocally or you can hear it when there are nasal obstructions when you are breathing through your nose.
<span />
<span>So when the charged insulator is placed near the uncharged metallic thing they both attract each other because there will be a distribution of charge between the insulator and uncharged object. This migration of charges happens regardless of their charge positive or negative.</span>
Hey there!
<span>Which statement best summarizes Gregor Mendel’s contribution to science?
Mendel is considered the "father of genetics". He did NOT increse the number of peas </span>
<span>produced by a single plant using cross-breeding techniques, discover grean peas and yellow peas, or invent the green pea by cross-breeding thousands of pea plants.
This means your answer is option D.
Hope this helps
Have a great day (:
</span>
Answer:
![\Rightarrow L=70 .03472 cm](https://tex.z-dn.net/?f=%5CRightarrow%20L%3D70%20.03472%20cm)
Explanation:
For convenience, let's represent the thermal expansion coefficient by
, i.e.
.
Given that, for steel
°
,
initial length,
, initial temperature,
°
, and the final temperature,
°
.
Let the length of the rod at
°
be
.
Now, change in length, ![\Delta L=\alpha L_0 \Delta T](https://tex.z-dn.net/?f=%5CDelta%20L%3D%5Calpha%20L_0%20%5CDelta%20T)
![\Rightarrow \Delta L=\alpha L_0 (T-T_0)](https://tex.z-dn.net/?f=%5CRightarrow%20%5CDelta%20L%3D%5Calpha%20L_0%20%28T-T_0%29)
![\Rightarrow L-L_0=1.24\times 10^{-5}\times 70 (110-70)](https://tex.z-dn.net/?f=%5CRightarrow%20%20L-L_0%3D1.24%5Ctimes%2010%5E%7B-5%7D%5Ctimes%2070%20%28110-70%29)
![\Rightarrow L-70=1.24\times 10^{-5}\times 70 \times 40](https://tex.z-dn.net/?f=%5CRightarrow%20L-70%3D1.24%5Ctimes%2010%5E%7B-5%7D%5Ctimes%2070%20%5Ctimes%2040)
![\Rightarrow L=70 + 0.03472 cm](https://tex.z-dn.net/?f=%5CRightarrow%20L%3D70%20%2B%200.03472%20cm)
![\Rightarrow L=70 .03472 cm](https://tex.z-dn.net/?f=%5CRightarrow%20L%3D70%20.03472%20cm)
Hence, the length of the rod at
°
be
.
Answer:4.04 m
Explanation:
mass of athlete ![m=57 kg](https://tex.z-dn.net/?f=m%3D57%20kg)
initial speed ![u=8.9 m/s](https://tex.z-dn.net/?f=u%3D8.9%20m%2Fs)
To get the maximum height h of Athlete we conserve energy i.e.
Kinetic Energy of Athlete=Potential energy gained by athlete
![\frac{1}{2}\times mu^2=m\cdot g\cdot h](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%5Ctimes%20mu%5E2%3Dm%5Ccdot%20g%5Ccdot%20h)
![h=\frac{v^2}{2g}](https://tex.z-dn.net/?f=h%3D%5Cfrac%7Bv%5E2%7D%7B2g%7D)
![h=\frac{8.9^2}{2\times 9.8}](https://tex.z-dn.net/?f=h%3D%5Cfrac%7B8.9%5E2%7D%7B2%5Ctimes%209.8%7D)
![h=4.04 m](https://tex.z-dn.net/?f=h%3D4.04%20m)
(b)Speed at half of maximum height
Considering v be the velocity at half of maximum height
conserving Energy we can write
![\frac{mu^2}{2}=\frac{mv^2}{2}+mg\frac{h}{2}](https://tex.z-dn.net/?f=%5Cfrac%7Bmu%5E2%7D%7B2%7D%3D%5Cfrac%7Bmv%5E2%7D%7B2%7D%2Bmg%5Cfrac%7Bh%7D%7B2%7D)
(as
)
thus ![v^2=\frac{u^2}{2}](https://tex.z-dn.net/?f=v%5E2%3D%5Cfrac%7Bu%5E2%7D%7B2%7D)
![v=\frac{u}{\sqrt{2}}](https://tex.z-dn.net/?f=v%3D%5Cfrac%7Bu%7D%7B%5Csqrt%7B2%7D%7D)
![v=\frac{8.9}{\sqrt{2}}](https://tex.z-dn.net/?f=v%3D%5Cfrac%7B8.9%7D%7B%5Csqrt%7B2%7D%7D)
![v=6.29 m/s](https://tex.z-dn.net/?f=v%3D6.29%20m%2Fs)
So Athlete interact with the gravitational Field of Earth