By there carbon dioxide effecting the air
The answer is B that is sound wave. Sound wave required a medium to travel.
Mechanical wave is not capable of transfer its energy through vacuum . It required a medium to travel and sound wave is an example of mechanical wave that required a medium to travel.
So, All other wave that are listed here doesn't required a medium to travel, among all only sound wave requires a medium to travel.
Copper has a density of 8.96 g/cm^3
<span>Beta decay increases the atomic number by 1, and does not change the mass number. 28Mg12 → 0e-1 + 28Al13</span>
Answer:
Graham's law states that the rate of effusion or of diffusion of a gas is inversely proportional to the square root of its molecular weight. So, rate of diffusion of hydrogen gas is four times faster than oxygen gas.
Explanation:
