1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
strojnjashka [21]
3 years ago
5

In the simple Bohr model of the eighth excited state of the hydrogen atom, the electron travels in a circular orbit around a fix

ed proton. The radius of the orbit is 4.28 ✕ 10−9 m, and the speed of the electron is 2.43 ✕ 105 m/s. The mass of an electron is 9.11 ✕ 10−31 kg. What is the force on the electron (in N)? (Enter the magnitude.)
Physics
1 answer:
Ksju [112]3 years ago
8 0

Answer:

Net force on electron will be 12.568\times 10^{-12}N            

Explanation:

We have given that the orbit r=4.28\times 10^{-9}m

Speed of the electron v=2.43\times 10^5m/sec

Mass of the electron is given as m=9.11\times 10^{-31}kg

Centripetal acceleration is given by a_c=\frac{v^2}{r}=\frac{(2.43\times 10^5)^2}{4.28\times 10^{-9}}=1.3796\times 10^{19}m/sec^2

Force is given by F = ma

So force F=9.11\times 10^{-31}\times 1.3796\times 10^{19}=12.568\times 10^{-12}N

You might be interested in
Um objeto de 4cm de altura está a 30cm de um espelho côncavo, cujo raio de curvatura tem valor absoluto de 20cm.
Shkiper50 [21]

a) The distance of the image from the mirror is 15 cm

b) The size of the image is -2 cm (inverted)

Explanation:

a)

We can solve this first part of the problem by applying the mirror equation:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

where

f is the focal length

p is the distance of the object from the mirror

q is the distance of the image from the mirror

For a mirror, the focal length is half the radius of curvature, R:

f=\frac{R}{2}

For this mirror, R = 20 cm, so its focal length is

f=\frac{20}{2}=+10 cm (positive for a concave mirror)

Here we also know:

p = 30 cm is the distance of the object from the mirror

So, by applying the equation, we can find q:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{10}-\frac{1}{30}=\frac{1}{15} \rightarrow q = 15 cm

b)

We can solve this part by using the magnification equation:

M=-\frac{y'}{y}=\frac{q}{p}

where

y' is the size of the image

y is the size of the object

q is the distance of the image from the mirror

p is the distance of the object from the mirror

Here we have:

q = 15 cm

p = 30 cm

y = 4 cm

Solving for y', we find the size of the image:

y'=-y\frac{q}{p}=-(4)\frac{15}{30}=-2 cm

and the negative sign means that the image is inverted.

#LearnwithBrainly

6 0
3 years ago
Two piano strings produce beats. Frequencies of the strings are 1560 Hz. and 1563 Hz. Choose the correct frequency of the beats.
kakasveta [241]

Beat frequency is given by the difference of two frequencies played together

f_{beat} = |f_1 - f_2|

given that

f_1 = 1560 Hz

f_2 = 1563 Hz

Now

f_{beat} = |1560- 1563| Hz

f_{beat} = 3 Hz

3 0
3 years ago
Read 2 more answers
What was Laurentia and what lands was it composed of? What happened to it?
snow_lady [41]
Laurentia, also called the North American Craton, is a huge continental craton. It<span> forms the ancient </span>geological<span> core of the </span>continent of North America.<span> It is made up of present day North America and Greenland. About 300 million years ago, it collided with the southern hemispheric continent of </span>Gondwana<span> and formed the supercontinent called Pangaea.</span><span> </span>
4 0
3 years ago
A particle of mass M moves along a straight line with initial speed vi. A force of magnitude F pushes the particle a distance D
LenaWriter [7]

Answer:

vf = √(vi²+2*(F/m)*D)

Explanation:

Given

Mass of the particle: M

Initial speed of the particle: vi

Force: F

Distance: D

We can apply the formula

F = M*a   ⇒    a = F/m

then we use the equation

vf = √(vi²+2*a*D)

⇒  vf = √(vi²+2*(F/m)*D)

6 0
3 years ago
Why is the law of gravity an example of a universal law
ella [17]
Its an example of a universal law because gravity occurs in every place of the world 
Hoped I helped!!!!!
8 0
3 years ago
Other questions:
  • I will give a Brainly to the best answer. Good luck, my good friends!
    6·1 answer
  • If you add a battery to a series circuit what will happen to the current in the circuit
    9·1 answer
  • Gold can be found in native or pure state in nature, why​
    9·1 answer
  • Just for fun, a person jumps from rest from the top of a tall cliff overlooking a lake. in falling through a distance h, she acq
    12·1 answer
  • What is the difference between the law of conservation of energy and conserving energy
    11·1 answer
  • louis Pasteur developed the germ theory of disease, which state that many diseases are caused by microorganismas. Had scientists
    9·1 answer
  • Which happens during the day at the beach?
    13·1 answer
  • An empty elevator has a mass of 722 kg. It moves between floors at a maximum speed of 6.00 m/s. The elevator is stopped on the 2
    14·1 answer
  • An infrared (IR) and ultraviolet (UV) wave propagating through a vacuum must have the same____
    8·1 answer
  • A mass of (200 g) of hot water at (75.0°C) is mixed with cold water of mass M at (5.0°C). The final temperature of the mixture i
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!