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sweet [91]
3 years ago
8

What is a component of John Dalton's atomic theory

Chemistry
2 answers:
yuradex [85]3 years ago
6 0
Everything is composed of atoms<span>, which are the indivisible building blocks of matter and cannot be destroyed. hope this helped!!!!! :D

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Nadusha1986 [10]3 years ago
5 0
His main points are that everything is made of atoms, all atoms in an element are exactly the same, atoms are indivisible and cannot be destroyed, and atoms in different elements have different size and mass
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Which statement explains how the charges on objects determine the electric force between them?(1 point)
lubasha [3.4K]

Answer:

Objects with the same charge repel each other, and objects with opposite charges attract each other.

Explanation:

The Coulomb law states that opposite charges attract each other and like charges repel each other. That means two positive charges repel each other but a positive and a negative charge attract.  

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2 years ago
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What quality is attributed to water due to “capillary action”?
irakobra [83]

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Why is it important to do further investigations to determine if a chemical change really occurred?
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2 years ago
A mileage test is conducted for a new car model. Thirty randomly selected cars are driven for a month and the mileage is measure
Leni [432]

Answer:  (27.81,\ 29.39)

Explanation:

Given : Sample size : n= 30 , it means it is a large sample (n≥ 30), so we use z-test .

Significance level : \alpha: 1-0.95=0.05

Critical value: z_{\alpha/2}=1.96

Sample mean : \overline{x}=28.6

Standard deviation : \sigma=2.2

The formula to find the confidence interval is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

i.e. 28.6\pm (1.96)\dfrac{2.2}{\sqrt{30}}

i.e. 28.6\pm 0.787259889321

\approx28.6\pm 0.79=(28.6-0.79,28.6+0.79)=(27.81,\ 29.39)

Hence, the 95% confidence interval for the mean mpg in the entire population of that car model = (27.81,\ 29.39)

4 0
3 years ago
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never [62]

Answer:

a food pyramid.

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the food pyramid shows how autotrophs are at the bottom and how the top predators are at the top, in this case the eagle.

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