C. A step-by-step process that takes time, and is essential for learning physics concepts.
Because a liquid can take the wheight of the hydraulic press while a gas could combust under pressure.
Answer:
48 hours
Explanation:
Using the formula,
R/R' = 2ᵃ/ᵇ..................... Equation 1
Where R = Original amount, R' = Radioactive remain, a = Total time, b = half life.
Given: b = 24 hours,
Let: R = X, then R' = X/4.
Substitute into equation 1
X/(X/4) = 2ᵃ/²⁴
4 = 2ᵃ/²⁴
2² = 2ᵃ/²⁴
Equating the base and solving for a
2 = a/24
a = 24×2
a = 48 hours.
Hence the time = 48 hours
The Canadian Shield<span>, also called the Laurentian Plateau, or Bouclier canadien (French), is a large area of exposed Precambrian igneous and high-grade metamorphic </span>rocks<span> (geological </span>shield<span>) that forms the ancient geological core of the North American continent (the North American Craton or Laurentia).</span>
