First, it makes your skin feel cooler<span> when it's wet. And when it </span>evaporates<span> it removes some heat. But sweat will only </span>evaporate<span> in an environment where there isn't much</span>water<span> in the air. In a place with high humidity, there're already lots of </span>water<span> molecules in the air. </span>
<u>Answer:</u> The Young's modulus for the wire is ![6.378\times 10^{10}N/m^2](https://tex.z-dn.net/?f=6.378%5Ctimes%2010%5E%7B10%7DN%2Fm%5E2)
<u>Explanation:</u>
Young's Modulus is defined as the ratio of stress acting on a substance to the amount of strain produced.
The equation representing Young's Modulus is:
![Y=\frac{F/A}{\Delta l/l}=\frac{Fl}{A\Delta l}](https://tex.z-dn.net/?f=Y%3D%5Cfrac%7BF%2FA%7D%7B%5CDelta%20l%2Fl%7D%3D%5Cfrac%7BFl%7D%7BA%5CDelta%20l%7D)
where,
Y = Young's Modulus
F = force exerted by the weight = ![m\times g](https://tex.z-dn.net/?f=m%5Ctimes%20g)
m = mass of the ball = 10 kg
g = acceleration due to gravity = ![9.81m/s^2](https://tex.z-dn.net/?f=9.81m%2Fs%5E2)
l = length of wire = 2.6 m
A = area of cross section = ![\pi r^2](https://tex.z-dn.net/?f=%5Cpi%20r%5E2)
r = radius of the wire =
(Conversion factor: 1 m = 1000 mm)
= change in length = 1.99 mm = ![1.99\times 10^{-3}m](https://tex.z-dn.net/?f=1.99%5Ctimes%2010%5E%7B-3%7Dm)
Putting values in above equation, we get:
![Y=\frac{10\times 9.81\times 2.6}{(3.14\times (8\times 10^{-4})^2)\times 1.99\times 10^{-3}}\\\\Y=6.378\times 10^{10}N/m^2](https://tex.z-dn.net/?f=Y%3D%5Cfrac%7B10%5Ctimes%209.81%5Ctimes%202.6%7D%7B%283.14%5Ctimes%20%288%5Ctimes%2010%5E%7B-4%7D%29%5E2%29%5Ctimes%201.99%5Ctimes%2010%5E%7B-3%7D%7D%5C%5C%5C%5CY%3D6.378%5Ctimes%2010%5E%7B10%7DN%2Fm%5E2)
Hence, the Young's modulus for the wire is ![6.378\times 10^{10}N/m^2](https://tex.z-dn.net/?f=6.378%5Ctimes%2010%5E%7B10%7DN%2Fm%5E2)
R = ρ L/A. R= resistance, ρ= resistivity, L= length of the conductor. A = area of the conductor. Resistance is directly proportional to the length of the conductor. So if length of the conductor is decreased, resistance will also decrease. Hence A is the correct option
I believe scattering is what occurs when light essentially changes direction after colliding with small particles of matter.
Answer:Deforestation refers to the decrease in forest areas across the world that are lost for other uses such as agricultural croplands, urbanization, or mining activities. Greatly accelerated by human activities since 1960, deforestation has been negatively affecting natural ecosystems, biodiversity, and the climate. The UN’s Food and Agriculture Organization estimates the annual rate of deforestation to be around 1.3 million km2 per decade.
Explanation: