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alisha [4.7K]
3 years ago
15

Science tools that help you observe objects

Chemistry
2 answers:
Klio2033 [76]3 years ago
6 0
Microscope, magnifying glass,
alexira [117]3 years ago
3 0
Magnifying glass and a microscope
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. Arrange the following in order of increasing radius:
Anton [14]

Answer:

d

Explanation:

because nuclear charge ( no. of protons) increases

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3 years ago
PLEASE ANSWER + BRAINLIEST !!!
Sunny_sXe [5.5K]
Hope this would help you

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Which fossil fuel is a solid?<br> O oil<br> coal<br> O natural gas
zmey [24]

Answer:

Coal

Explanation:

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2 years ago
Predict the gravitational and electrostatic forces between molecules of gases? Provide evidence for your prediction.
zmey [24]

the electrostatic forces are 10^{36} larger than the gravitational force

Explanation:

Let's do the calculation by using two molecules of hydrogen, each containing 2 atoms of hydrogen.

The gravitational force between the two molecules is given by:

F=\frac{G m_1 m_2}{r^2}

where

G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2} is the gravitational constant

m1 and m2 are the masses of the two molecules: since they are identical,

m_1 = m_2 = 2m_p = 1.67\cdot 10^{-27} kg, twice the mass of the proton

r is the distance between the two  molecules

The force can be rewritten as

F_G=\frac{Gm_p^2}{r^2}

We can assume instead that electrostatic force between the two molecules is given by the interaction between the positively charged nuclei and the neatively charged electrons. Therefore,

F_E=\frac{kq_1 q_2}{r^2}

where

k=8.99\cdot 10^9 Nm^{-2}C^{-2} is the Coulomb's constant

q_1 = q_2 = 2e is the magnitude of the charge of each molecule, where

e=1.6\cdot 10^{-19}C is the fundamental charge

r is the distance between the two molecules

So the force can be  rewritten as

F_E=\frac{ke^2}{r^2}

Therefore, the ratio between the two forces is:

\frac{F_E}{F_G}=\frac{ke^2}{Gm_p^2}=\frac{(8.99\cdot 10^9)(1.6\cdot 10^{-19})^2}{(6.67\cdot 10^{-11})(1.67\cdot 10^{-27})^2}\sim 10^{36}

So, the electrostatic forces are 10^{36} larger than the gravitational force.

Learn more about electric force:

brainly.com/question/8960054

brainly.com/question/4273177

Learn more about gravitational force:

brainly.com/question/1724648

brainly.com/question/12785992

#LearnwithBrainly

6 0
3 years ago
The inner part of the ovary that contains an egg is the ovule<br> true or false
tigry1 [53]

Answer:

The answer is true

Explanation:

the ovary is a tubular structure and contains ovules

3 0
2 years ago
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