Answer:
The answer to the question is
50 % of the original amount of potassium 40 will be left after one half life or 1.25 billion years
Explanation:
To solve the question we note that the half life is the time for half of the quantity of substance that undergoes radioactive decay to disintegrate, thus
we have
half life of potassium 40 K₄₀ = 1.25 billion years
To support the believe tht the rock was formed 1.25 billion years ago we have
After 1.25 billion years we have
= =0.5 of will be left or 50 % of the original amount of potassium 40 will be left
Answer:
Explanation:
Distance is the product of speed and time.
The speed is 8 kilometers per hour and the time is 4 hours.
Substitute the values into the formula and multiply. Note that the hours will cancel when multiplied.
Mr. Evans traveled <u>32 kilometers.</u>
I guess it about 142 atoms
The sugar is called solute and water is called solvent. And the sugar and water together is called solution.