Answer:
2
Explanation:
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It is known that atoms are formed by protons, neutrons and electrons. Research has shown that each of these particles have charge.
-The electrons have negative carge
-Protons have a positive charge
-Neutrons have a neutral charge.
The currently accepted atomic models describe the atom as a nucleus formed protons and neutrons, with electrons orbiting around this nucleus as shown in the attached image.
Therefore the correct option is. D. They have a positive charge and are present in the nucleus of an atom along with neutrons.
Your answer choice is ( A)
Sorry if I’m wrong
Answer:
The total initial volume of air in the tire is 800 cm³
Explanation:
Given;
volume of air in the bicycle pump, V₁ = 200 cm³
volume of the tire, V₂ = 800 cm³
The total initial volume of air in the tire is 800 cm³ and when the pump is pushed in, the total volume of air in the tire becomes 200 cm³. This occurs because the new air pumped into the tire through the bicycle pump compresses the air that was previously in the tire and raises the pressure of the tire that was initially flat.
From Boyle's law, a decrease in volume causes an increase in pressure.