Answer:
Gametes are the cells used during sexual reproduction to produce a new individual organism.
Explanation:
The male gamete or sperm, is a smaller, mobile cell that meets up with the much larger and less mobile female gamete, egg or ova.
Wildlife researcher starts from a and then reaches b, he turns towards north 40 degree to move towards c.
Total displacement is ac
Total horizontal displacement = 4+4 cos40 =7.06 km
Total vertical displacement = 4 sin40 =2.57 km
Total displacement
= 7.51 km
Answer:
![2.82942\times 10^{24}\ W\m^2](https://tex.z-dn.net/?f=2.82942%5Ctimes%2010%5E%7B24%7D%5C%20W%5Cm%5E2)
Explanation:
d = Diameter of spot = 30 μm
r = Radius of spot = ![\frac{d}{2}=\frac{30}{2}=15\ mu m](https://tex.z-dn.net/?f=%5Cfrac%7Bd%7D%7B2%7D%3D%5Cfrac%7B30%7D%7B2%7D%3D15%5C%20mu%20m)
P = Power of the laser = ![2\times 10^{15}\ W](https://tex.z-dn.net/?f=2%5Ctimes%2010%5E%7B15%7D%5C%20W)
A = Area = ![\pi r^2](https://tex.z-dn.net/?f=%5Cpi%20r%5E2)
Intensity is given by
![I=\frac{P}{A}\\\Rightarrow I=\frac{2\times 10^{15}}{\pi\times (15\times 10^{-6})^2}\\\Rightarrow I=2.82942\times 10^{24}\ W/m^2](https://tex.z-dn.net/?f=I%3D%5Cfrac%7BP%7D%7BA%7D%5C%5C%5CRightarrow%20I%3D%5Cfrac%7B2%5Ctimes%2010%5E%7B15%7D%7D%7B%5Cpi%5Ctimes%20%2815%5Ctimes%2010%5E%7B-6%7D%29%5E2%7D%5C%5C%5CRightarrow%20I%3D2.82942%5Ctimes%2010%5E%7B24%7D%5C%20W%2Fm%5E2)
The light intensity within this spot is ![2.82942\times 10^{24}\ W/m^2](https://tex.z-dn.net/?f=2.82942%5Ctimes%2010%5E%7B24%7D%5C%20W%2Fm%5E2)
when the two waves interfere with eachother to make a dark spot the periodic difference of the two waves is π . the wave length for 2π is 600nm
. ie. for π difference it is 300nm
<h2>Answer: free electrons</h2>
<u>Plasma</u> is known as the 4th state of matter and is itself ionized gas. In this sense, ionization consists of the production of ions, which are <u>electrically charged atoms or molecules due to</u><u> the excess or lack of electrons</u><u> with respect to a neutral atom or molecule.
</u>
That is why in this process there are always<u> free electrons</u>. Therefore in heating gas to create plasma can yield free electrons, and the correct option is D.