Answer:
The pressure of the air in the tyre is 20 kPa
Explanation:
The parameters for the bicycle pump and tyre are;
The volume of air contained in the bicycle pump, V₁ = 20 cm³
The pressure of the air contained in the bicycle pump, P₁ = 100 kPa
The volume (available) of the tyre, where the air is pumped, V₂ = 100 cm³
Let P₂ represent the pressure in the tyre after the air is pumped
By Boyle's law, we have that at constant temperature, the volume of a given mass of gas is inversely proportional to its pressure;
Mathematically, Boyle's law gives the following equation;
P₁ × V₁ = P₂ × V₂
∴ P₂ = (P₁ × V₁)/V₂
Substituting the known values gives;
P₂ = (100 kPa × 20 cm³)/(100 cm³)
∴ P₂ = 100 kPa × 1/5 = 20 kPa
P₂ = 20 kPa
The pressure of the air in the tyre = P₂ = 20 kPa.
Answer:
This can be translated to:
"find the electrical charge of a body that has 1 million of particles".
First, it will depend on the charge of the particles.
If all the particles have 1 electron more than protons, we will have that the charge of each particle is q = -e = -1.6*10^-19 C
Then the total charge of the body will be:
Q = 1,000,000*-1.6*10^-19 C = -1.6*10^-13 C
If we have the inverse case, where we in each particle we have one more proton than the number of electrons, the total charge will be the opposite of the one of before (because the charge of a proton is equal in magnitude but different in sign than the charge of an electron)
Q = 1.6*10^-13 C
But commonly, we will have a spectrum with the particles, where some of them have a positive charge and some of them will have a negative charge, so we will have a probability of charge that is peaked at Q = 0, this means that, in average, the charge of the particles is canceled by the interaction between them.
Is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. Two types of electric charges are positive and negative.
