Answer:
20 g/mol
Explanation:
We can use <em>Graham’s Law of diffusion</em>:
The rate of diffusion (<em>r</em>) of a gas is inversely proportional to the square root of its molar mass (<em>M</em>).
If you have two gases, the ratio of their rates of diffusion is
Squaring both sides, we get
Solve for <em>M</em>₂:
The answer is D. Rubber. Because A, B, and C are metal materials that will insulate heat without any gaps. Hope this helped!
The kinetic energy of a charged particle is related to the electric field potential via the following equation:
1/2*m*v² = q* E -----(1)
where m = mass of the particle
v = velocity
q = charge
E = potential
since kinetic energy KE = 1/2mv², eq (1) can be written as:
KE = q*E
i.e kinetic energy of a charge is directly proportional to the strength of the electric field potential (E)
Therefore, as the charge moves from a higher to a lower potential, its kinetic energy will also decrease.
Ans: B)
The kinetic energy decreases
