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
Travka [436]
3 years ago
10

..... the atomic theory has been revised over time .. J.J Thompson described the atom as having a mix of positive and negative c

harges randomly scattered throughout a sphere of space ... Ruthford's experiments proved this model incorrect and developed the model with a tiny positively charged nucleus .. today, the model is more complex posting a cloud of electrons around a nucleus of protons and neutrons. why has the atomic theory changed during the last several hundred years.
A the splitting of the first atom created the need for a new model
B modern scientific methods are more reliable in developing theories
C the atom has changed over time and the model reflects those changes
D as new discoveries are made existing theories are revising or replaced
Physics
1 answer:
zloy xaker [14]3 years ago
6 0
The Atomic Theory changed during the last several hundred years because:

D. as new discoveries are made existing theories are revised or replaced.

Though there is a new atomic theory, the value of previous atomic theories does not diminish because these theories were the basis of the new theory drawn upon further studies made on studies conducted by the previous theories with the use of modern scientific method to produce more accurate and reliable result.




You might be interested in
In one of the classic nuclear physics experiments at the beginning of the 20th century, an alpha particle was accelerated toward
Vladimir79 [104]

Answer:

The answer is "1.01 \times 10^{-13}"

Explanation:

Using the law of conservation for energy. Equating the kinetic energy to the potential energy.

KE=U=\frac{kqq'}{r}\\\\

Calculating the closest distance:

\to r=\frac{kqq'}{KE}\\\\

=\frac{k(2e)(79e)}{KE}\\\\=\frac{k(2)(79)e^2}{KE}\\\\=\frac{9.0\times 10^9 \ N \cdot \frac{m^2}{c}(2)(79)(1.6 \times10^{-19} \ C)^2}{(2.25\ meV) (\frac{1.6 \times 10^{-13} \ J}{1 \ MeV})}\\\\

=\frac{9.0\times 10^9 \times 2\times 79\times 1.6 \times10^{-19}\times 1.6 \times10^{-19} }{(2.25 \times 1.6 \times 10^{-13}) }\\\\=\frac{3,640.32\times 10^{-29}}{3.6 \times 10^{-13} }\\\\=\frac{3,640.32}{3.6} \times 10^{-16}\\\\=1011.2 \times 10^{-16}\\\\=1.01 \times 10^{-13}

5 0
3 years ago
What’s the difference between atoms and molecules in a substance?
Goryan [66]

Answer:

Atoms are single neutral particles.

example: Ne, O

Molecules are neutral particles made of two or more atoms bonded together.

example:O2,HCl

5 0
4 years ago
Read 2 more answers
A child has an ear canal that is 1.3 cm long. Assume the speed of sound is v = 344 m/s.
kap26 [50]

Answer:

The  frequencies are (f, f_1) =  (6615.4 \ Hz , 19846.2\ Hz)

Explanation:

From the question we are told that

  The  length of the ear canal is  l = 1.3 \ cm  =\frac{1.3}{100}  =  0.013 \ m

   The  speed of sound is assumed to be  v_s  =  344 \ m/s

Now  taking look at a typical  ear canal  we see that we assume it is  a  closed pipe

   Now the fundamental harmonics for the pipe(ear canal) is mathematically represented as

            f = \frac{v_s}{4 * l }

 substituting values  

          f = \frac{344}{4 * 0.013 }

         f = 6615.4 \ Hz

Also the the second harmonic for the pipe (ear canal) is mathematically represented as

        f_1 =  \frac{3v_s}{4 * l}

 substituting values  

       f_1 =  \frac{3 *  344}{4 * 0.013}

       f_1 =   19846.2 \ Hz

Given that sound would be loudest in the pipe at the frequency, it implies that the child  will have an increased audible sensitivity at this  frequencies

6 0
3 years ago
Did I do these questions correctly?
Elena L [17]
For number 11, you should say that there is more pollution and fossil fuels being burned.
8 0
3 years ago
An object that is slowing down is accelerating.<br> True<br> False
Art [367]
Answer:

True

Explanation

When an object slows down the Acceleration is in the other direction which “ slows it down
8 0
3 years ago
Other questions:
  • A frog is at the bottom of a 17-foot well. Each time the frog leaps, it moves up 3 feet. If the frog has not reached the top of
    5·1 answer
  • Which of the following natural features is formed by weathering, erosion, and deposition?
    9·2 answers
  • The ______ is between the mesosphere and the exosphere. troposphere stratosphere thermosphere exosphere
    8·2 answers
  • How are the layers of the atmosphere separated
    7·2 answers
  • What collides and creates a movement of heat called conduction?
    13·1 answer
  • What is your weight on Venus, assuming that the acceleration due to gravity on Venus is 8.875 m/s^2 and your mass is 50 kg.
    15·2 answers
  • What is wind shear? When wind is moving extremely fast in one direction When wind is moving with a circular motion When two wind
    9·1 answer
  • What does Kepler's first law of planetary motion imply?
    10·1 answer
  • Metals are amazing, and they are all around us. You can probably easily identify them by their shiny surfaces and tinny sound wh
    9·1 answer
  • 12. Suppose a person is covered head to foot by wool clothing with average thickness of 2.00 cm and is transferring energy by co
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!