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Sever21 [200]
3 years ago
10

Please help

Physics
1 answer:
adelina 88 [10]3 years ago
5 0

Answer:

I'm pretty sure that the answer is A

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In this activity, you will research how scientists developed historical
Darya [45]

Answer: Bohr's model (1913)

  Niels Bohr improved Rutherford's model. Using mathematical ideas, he showed that electrons occupy shells or energy levels around the nucleus. The Dalton model has changed over time because of the discovery of subatomic particles.

Bohr's model (1913)

  Niels Bohr improved Rutherford's model. Using mathematical ideas, he showed that electrons occupy shells or energy levels around the nucleus. The Dalton model has changed over time because of the discovery of subatomic particles

  Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.

  John Dalton

The idea that everything is made of atoms was pioneered by John Dalton (1766-1844) in a book he published in 1808. He is sometimes called the "father" of atomic theory, but judging from this photo on the right "grandfather" might be a better term.

Explanation:

8 0
3 years ago
Sarah is looking for a way to move her boat across the water without touching it directly. She included paperclips in the boat d
Zigmanuir [339]

Answer:

When there is no detergent in the water, you'll achieve a floating paper clip!

Explanation:

3 0
3 years ago
Read 2 more answers
PLEASE HELP ME!! What is the difference between direct current and alternating current?
Paha777 [63]
In a direct current the electric charge flows in one direction.
in an alternating the electric charge changes in its direction periodically.
6 0
3 years ago
Research has shown that the electrons orbit the nucleus in circular motions as shown on the classic Bohr model.
Stels [109]
Research has shown that the electrons orbit the nucleus in circular motions as shown on the classic Bohr model. FALSE
6 0
3 years ago
Read 2 more answers
A student holds a bike wheel and starts it spinning with an initial angular speed of 9.0 rotations per second. The wheel is subj
KATRIN_1 [288]

Answer:

\Delta t = 8 s

Explanation:

As we know that the angular acceleration of the wheel due to friction is constant

so we can use kinematics

\theta = \omega_i t + \frac{1}{2}\alpha t^2

so we have

(65 \times 2\pi) = (2\pi \times 9)(10) + \frac{1}{2}(\alpha)(10^2)

130\pi = 180\pi + 50 \alpha

\alpha = -\pi rad/s^2

now time required to completely stop the wheel is given as

\omega_f = \omega_i + \alpha t

0 = (2\pi \times 9) + (-\pi) t

t = 18 s

now time required to stop the wheel is given as

\Delta t = 18 - 10

\Delta t = 8 s

6 0
3 years ago
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