Answer:
<h2>4.9 J</h2>
Explanation:
The gravitational potential energy of a body can be found by using the formula
GPE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
GPE = 10 × 9.8 × 0.05
We have the final answer as
<h3>4.9 J</h3>
Hope this helps you
Answer:
F' = (4/9)F
Explanation:
The electrostatic force between two charged objects is given by Coulomb's Law:
F = kq₁q₂/r² -------------------- equation (1)
where,
F = Electrostatic Force
k = Coulomb's Constant
q₁ = magnitude of first charge
q₂ = magnitude of second charge
r = distance between charges
Now, when the charges and distance altered as follows:
q₁' = 2q₁
q₂' = 2q₂
r' = 3r
Then,
F' = kq₁'q₂'/r'²
F' = k(2q₁)(2q₂)/(3r)²
F' = (4/9)kq₁q₂/r²
using equation (1):
<u>F' = (4/9)F</u>
Highest energy photon absorbed: ![2.18\cdot 10^{-18}J](https://tex.z-dn.net/?f=2.18%5Ccdot%2010%5E%7B-18%7DJ)
Explanation:
An atom is said to be (positively) ionised when it absorbs a photon, and as a consequence, an electron becomes energetic enough to escape the atom, leaving an excess of positive charge behind.
In order for the electron to escape, the energy of the absorbed photon must be exactly equal to the (negative) energy of the level in which the electron lies.
For an hydrogen atom, the energy levels are given by
![E_n = -13.6 \frac{1}{n^2}](https://tex.z-dn.net/?f=E_n%20%3D%20-13.6%20%5Cfrac%7B1%7D%7Bn%5E2%7D)
where this energy is measured in electronvolts, and n is the number of the energy level.
Since the energy is negative, this means that the electron which requires most energy is the one lying in the ground state (n=1). Therefore, for an electron in the ground state, the most energy that can be absorbed from the incoming photon is
![E_1 = -13.6 eV](https://tex.z-dn.net/?f=E_1%20%3D%20-13.6%20eV)
Converting into Joules, this is equal to
![E_1 = 13.6 \cdot 1.6\cdot 10^{-19}=2.18\cdot 10^{-18}J](https://tex.z-dn.net/?f=E_1%20%3D%2013.6%20%5Ccdot%201.6%5Ccdot%2010%5E%7B-19%7D%3D2.18%5Ccdot%2010%5E%7B-18%7DJ)
Learn more about hydrogen atom:
brainly.com/question/2757829
#LearnwithBrainly
Answer:
<u>True</u><u> </u>
Explanation:
The force of gravity keeps all of the planets in orbit around the sun
No because you don’t learn about synthetic inventions yet in your first year