From the calculation, the wavelength of the waves is about 264 nm and belongs to the ultraviolet spectrum.
<h3>What is photoelectric effect?</h3>
The term photoelectric effect can be used to describe the loss of electron from the surface of a metal. Given that; KE = E - W, where;
KE = kinetic energy of the emitted photoelectron
E = energy of the photon
W = work function of the metal
![2= E - 2.71\\E = 2 + 2.71\\E = 4.71ev or 7.5 * 10^-19 J](https://tex.z-dn.net/?f=2%3D%20E%20-%202.71%5C%5CE%20%3D%202%20%2B%202.71%5C%5CE%20%3D%204.71ev%20or%207.5%20%2A%2010%5E-19%20J)
λ= hc/E
λ= ![6.6 * 10^-34 * 3 * 10^8/7.5 * 10^-19](https://tex.z-dn.net/?f=6.6%20%2A%2010%5E-34%20%2A%203%20%2A%2010%5E8%2F7.5%20%2A%2010%5E-19)
λ=
or 264 nm
Learn more about wavelength:brainly.com/question/13533093
#SPJ4
Answer:2.103 m/s
Explanation:
Given
mass of sports car ![m=930\ kg](https://tex.z-dn.net/?f=m%3D930%5C%20kg)
mass of SUV ![M=2000\ kg](https://tex.z-dn.net/?f=M%3D2000%5C%20kg)
Suppose u is the velocity if sports car before collision
Conserving momentum we get
![mu=(M+m)v](https://tex.z-dn.net/?f=mu%3D%28M%2Bm%29v)
![v=\dfrac{2000+930}{930}\times u](https://tex.z-dn.net/?f=v%3D%5Cdfrac%7B2000%2B930%7D%7B930%7D%5Ctimes%20u)
![v=3.15\cdot u](https://tex.z-dn.net/?f=v%3D3.15%5Ccdot%20u)
After collision the combined mass drag 2.8 m and finally stops
From work energy theorem work done by friction is equal to change in kinetic energy of the combined mass system
![\frac{1}{2}(M+m)v^2=\mu (M+m)gx](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%28M%2Bm%29v%5E2%3D%5Cmu%20%28M%2Bm%29gx)
where ![\mu =\text{coefficient of friction}](https://tex.z-dn.net/?f=%5Cmu%20%3D%5Ctext%7Bcoefficient%20of%20friction%7D)
![x=\text{drag distance}](https://tex.z-dn.net/?f=x%3D%5Ctext%7Bdrag%20distance%7D)
![v=\sqrt{2\mu gx}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2%5Cmu%20gx%7D)
![v=\sqrt{2\times 0.8\times 9.8\times 2.8}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2%5Ctimes%200.8%5Ctimes%209.8%5Ctimes%202.8%7D)
![v=6.626\ m/s](https://tex.z-dn.net/?f=v%3D6.626%5C%20m%2Fs)
Initial velocity ![u=\frac{6.626}{3.15}](https://tex.z-dn.net/?f=u%3D%5Cfrac%7B6.626%7D%7B3.15%7D)
![u=2.103\ m/s](https://tex.z-dn.net/?f=u%3D2.103%5C%20m%2Fs)
Answer:
The charge at the center of the conducting sphere is zero.
Explanation:
A principle of conductor materials is that the electric field inside a conductor in electrostatic state is always zero. The gauss law says that the flux of a electric field in a closed surface is proportional to the charge enclosed by the surface. Then if the Electric field inside of a conductor is zero, imperatively the charge anywhere inside the conductor is zero too, so the charge at the center of the sphere is zero.
Answer:
a) 147.95 Mpc
Explanation:
Using Hubble's formula
![v = H_od](https://tex.z-dn.net/?f=v%20%3D%20H_od)
where;
v = radical velocity
= Hubble's constant
d = distance
Given that:
The average radial velocity of galaxies in the Hercules cluster v = 10,800 km/s
Also using
= 73 km/s/ Mpc ; we make distance d the subject of the formula:
Then distance d can be written as:
![d = \frac{v}{H_o}](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7Bv%7D%7BH_o%7D)
![d = \frac{10,800 \ km/s}{73 \ km/s/Mpc}](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7B10%2C800%20%20%5C%20km%2Fs%7D%7B73%20%5C%20km%2Fs%2FMpc%7D)
d = 147.95 Mpc
b)
Now, if the Hubble constant had a smaller value, then for a given velocity the distance to the galaxy will increase because distance d is inversely proportional to
i.e
d ∝ ![\frac{1}{H_0}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BH_0%7D)
A natural gas power plant focuses on the use of non renewable energy resources.
<h3>What are non renewable energy?</h3>
Non-renewable energy are energy that comes from sources that cannot be exhausted.
- This energy can not be replaced because they don't get exhausted.
- Examples include energy form coal, natural gas, oil.
Therefore, natural gas power plant is an example of non renewable energy source.
For more information on non renewable energy source kindly check
https://brainly.in/question/32015541