Answer:
it shows examples of types of forces
Answer:
The observed wavelength on Earth from that hydrogen atom is
.
Explanation:
Given that,
The actual wavelength of the hydrogen atom, ![\lambda_a=5.13\times 10^{-7}\ m](https://tex.z-dn.net/?f=%5Clambda_a%3D5.13%5Ctimes%2010%5E%7B-7%7D%5C%20m)
A hydrogen atom in a galaxy moving with a speed of, ![v=6.65\times 10^6\ m/s](https://tex.z-dn.net/?f=v%3D6.65%5Ctimes%2010%5E6%5C%20m%2Fs)
We need to find the observed wavelength on Earth from that hydrogen atom. The speed of galaxy is given by :
![v=c\times \dfrac{\lambda_o-\lambda_a}{\lambda_a}](https://tex.z-dn.net/?f=v%3Dc%5Ctimes%20%5Cdfrac%7B%5Clambda_o-%5Clambda_a%7D%7B%5Clambda_a%7D)
is the observed wavelength
![\lambda_o=\dfrac{v\lambda_a}{c}+\lambda_a\\\\\lambda_o=\dfrac{6.65\times 10^6\times 5.13\times 10^{-7}}{3\times 10^8}+5.13\times 10^{-7}\\\\\lambda_o=5.24\times 10^{-7}\ m](https://tex.z-dn.net/?f=%5Clambda_o%3D%5Cdfrac%7Bv%5Clambda_a%7D%7Bc%7D%2B%5Clambda_a%5C%5C%5C%5C%5Clambda_o%3D%5Cdfrac%7B6.65%5Ctimes%2010%5E6%5Ctimes%205.13%5Ctimes%2010%5E%7B-7%7D%7D%7B3%5Ctimes%2010%5E8%7D%2B5.13%5Ctimes%2010%5E%7B-7%7D%5C%5C%5C%5C%5Clambda_o%3D5.24%5Ctimes%2010%5E%7B-7%7D%5C%20m)
So, the observed wavelength on Earth from that hydrogen atom is
. Hence, this is the required solution.
<span>B. Compression causes upward vertical movement.</span>
Answer: ![3.125g](https://tex.z-dn.net/?f=3.125g)
Explanation: This is a type of radioactive decay and all the radioactive process follow first order kinetics.
Half life is the time required to decompose half of the reactants. thus after every half life the reactant will decompose to half of its present value.
Now, to calculate the number of half lives, we use the formula:
where,
a = amount of reactant left after n-half lives = ?
=Let Initial amount of the reactant = 100 g
n = number of half lives
Answer:
As the liquid cools down, the amount of potential energy is reduced and the molecules start to move slower. When the water temperature reaches around 0°C, the molecules stick together and form a solid – ice
The "stuff" (molecules) in water is more tightly packed than in ice, so water has greater density than ice. Don't let the fact that ice is a solid fool you! As water freezes it expands. So, ice has more volume (it takes up more space, but has less density) than water
Explanation: