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zlopas [31]
3 years ago
7

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. Overl

apping red and blue balls in the center with a circular fuzzy green cloud outside them. What experimental evidence led to the development of this atomic model from the one before it? A few of the positive particles aimed at a gold foil seemed to bounce back off of the thin metallic foil. Experiments with water vapor showed that elements combine in specific proportions. Equations were used to identify regions around the nucleus where electrons would likely be. Cathode rays were bent in the same way whenever a magnet was brought near them.
Physics
2 answers:
olga55 [171]3 years ago
8 0

Answer:

A). A few of the positive particles aimed at a gold foil seemed to bounce back off of the thin metallic foil.

Explanation:

Scientists decided to change the model of the atom when they discovered new evidence that showed 'few of the positive particles aimed at a gold foil seemed to bounce back off of the thin metallic foil.' On this ground, <u>Rutherford concluded that atom is mostly made up of empty space and thus, he proposed a nucleus model of atom in which the atom comprises of the tiny and positively charged nucleus is surrounded by electrons with a negative charge</u>. Thus, <u>option A</u> is the correct answer.

Anastaziya [24]3 years ago
7 0

Answer: C. Equations were used to identify regions around the nucleus where electrons would likely be.

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F=mv^2/r
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Which of these experiments would make use of qualitative data?
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"A study of the different amounts of time it takes water to evaporate completely"
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What constant acceleration is required to increase the speed of a car from 26 mi/h to 51 mi/h in 5 seconds
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2.25 m/s² of acceleration is required to increase the speed of a car from 26 mi/h to 51 mi/h in 5 seconds.

To find the answer, we need to know about the acceleration.

<h3>What is acceleration?</h3>
  • Acceleration is given as the ratio of velocity to time.
  • Mathematically, acceleration= velocity/time.
<h3>What is the acceleration required to increase the speed of a car from 26 mi/h to 51 mi/h in 5 seconds?</h3>
  • Here change in velocity of the car is 51-26= 25 mi/h.
  • As 1 mi/h = 0.45 m/s. So 25mi/h = 11.25 m/s.
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Thus, we can conclude that the constant acceleration is 2.25 m/s².

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8 0
2 years ago
Boston Red Sox pitcher Roger Clemens could routinely throw a fastball at a horizontal
azamat

Answer: 0.145 seconds

Explanation:

Given that Roger Clemens could routinely throw a fastball at a horizontal speed of 119.7 m/s. How long did the ball take to reach home plate 17.3 m away

Since the speed is horizontal

Using the formula for speed which is

Speed = distance/time

Where

Speed = 119.7 m/s

Distance covered = 17.3 m

Time is what we are looking for

Substitute all the parameters into the formula

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Make time the subject of formula

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Therefore, it will take 0.145 seconds to reach the home plates

6 0
3 years ago
rt A For a given substance, do you expect the density of the substance in its liquid state to be closer to the density in the ga
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Answer:

A substance in its liquid state is closer to the density of its solid phase than the density of its gaseous phase.

Explanation:

For a substance in its liquid state we can expect the density of the substance more closer to the density of its solid state than its gaseous state because the the inter-molecular space is much close near to incompressible in the liquid state and the the inter-molecular force of attraction is much higher as compared to gaseous state.

In contrast to the molecular properties in liquid state gases have almost negligible inter-molecular force of attraction and very huge inter-molecular spacing which makes it well compressible.

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3 years ago
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