Mixtures are made up of 2 or more substances that are together in the same place but aren’t chemically bonded.
Answer:
There were originally 8 atoms of Potassium-40.
Explanation:
The half-life of a radioactive material is the time taken for half the original material to decay or the time required for a quantity of the radioactive substance to reduce to half of its initial value.
If the original material formed without any Argon-40, it means that the atoms originally present were Potassium-40 atoms.
Presently, there are 7 Argon-40 atoms for every 1 of Potassium-40, we can deduce the number of half-lifes the Potassium-40 has undergone as follows :
After one half-life, (1/2) there will be one Potassium-40 atom for every Argon-40 atom.
After a second half life, 1/2 × 1/2 = 1/4: there will be one Potassium-40 atom for every three atoms of Argon-40.
After a third half-life, 1/4 × 1/2 = 1/8: there will be one Potassium-40 atom for every 7 atoms of Argon-40.
Since there are 1/8 atoms of Potassium-40 presently, there were originally 8 atoms of Potassium-40.
Solid (ice caps)
Liquid (oceans, rivers, lakes, etc)
Gas (clouds)
Answer : The pressure become doubles.
Explanation :
Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.
or,
where,
= initial pressure
= final pressure
= initial temperature
= final temperature =
Now put all the given values in the above equation, we get:
From this we conclude that, as the temperature of gas doubles then the pressure of gas become doubles because pressure is directly proportional to the temperature of gas.
Hence, the pressure become doubles.
Answer:
frequency=?
Explanation:
wavelength=4.6x10^6m
speed=3x10^8ms-1
frequency=[3x10^8]/[4.6x10^6]
frequency=65.2s-1