What is net force on them ?

An electron with charge −e and mass m moves in a circular orbit of radius r around a nucleus of charge Ze, where Z is the atomic

shepuryov [24]

Answer:

$v=\sqrt{\frac{kZe^2}{mr}}$

Explanation:

The electrostatic attraction between the nucleus and the electron is given by:

$F=k\frac{(e)(Ze)}{r^2}=k\frac{Ze^2}{r^2}$ (1)

where

k is the Coulomb's constant

Ze is the charge of the nucleus

e is the charge of the electron

r is the distance between the electron and the nucleus

This electrostatic attraction provides the centripetal force that keeps the electron in circular motion, which is given by:

$F=m\frac{v^2}{r}$ (2)

where

m is the mass of the electron

v is the speed of the electron

Combining the two equations (1) and (2), we find

$k\frac{Ze^2}{r^2}=m\frac{v^2}{r}$

And solving for v, we find an expression for the speed of the electron:

$v=\sqrt{\frac{kZe^2}{mr}}$

6 0

2 years ago

PLEASE HELP !!!

emmainna [20.7K]

Answer and Explanation:

The answer is D) Alpha and Gamma

Gamma radiation does not cause transmutations.

A transmutation is the conversion of an atom of one element to an atom of another. This generally occurs through nuclear reacting.

There are three main types of radiation: alpha, beta, and gamma. Both beta and alpha decay cause changes to the mass and atomic numbers. This results in a transmutation. Gamma radiation, however, does not.

Gamma radiation is the result of a gamma ray. In essence, the nucleus emits a high-energy proton. This is very penetrating and can only be stopped by aluminum, lead, soil, water, and concrete. This type of radiation does not change the element and, therefore, does not cause a transmutation.

#teamtrees #PAW (Plant And Water)

3 0

2 years ago

A light beam is directed parallel to the axis of a hollow cylindrical tube. When the tube contains only air, the light takes 8.7

monitta

Answer:

Explanation:

velocity of light in a medium of refractive index V = V₀ / μ

V₀ is velocity of light in air and μ is refractive index of light.

time to travel in tube with air = length of tube / velocity of light

8.72 ns = L / V₀ L is length of tube .

time to travel in tube with jelly = length of tube / velocity of light

8.72+ 1.82 = L / V L is length of tube .

10.54 ns = L / V

dividing the equations

10.54 / 8.72 = V₀ / V

10.54 / 8.72 = μ

1.21 = μ

refractive index of jelly = 1.21 .

3 0

2 years ago

Use the following d/t graph to determine the velocity of the object

marin [14]

Answer:

1/3 m/s

Explanation:

Because the graph goes from 3 to 8 on the Y axis we know that each line is 0.5 and on the X axis each line is 1, Then, the slope , or velocity, is 1/3

see? This graph is kinda set up to throw you.

Is there a 1/3 option for this ??

5 0

1 year ago

Sound travels through a

attashe74 [19]

Answer:

A.3.64 m

Explanation:

Because

v=(fλ)
(1382)=(380)λ
λ=3.637m~3.64m

where ,v=velocity

f=frequency 

λ=wave length 

8 0

1 year ago

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