A child on a bridge throws a rock straight down to the water below. The point where the child released the rock is 82 m above th
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Answer:
The heat loss per unit length is
Explanation:
From the question we are told that
The outer diameter of the pipe is
The thickness is
The temperature of water is
The outside air temperature is
The water side heat transfer coefficient is
The heat transfer coefficient is
The heat lost per unit length is mathematically represented as
Substituting values
Via half-life equation we have:
Where the initial amount is 50 grams, half-life is 4 minutes, and time elapsed is 12 minutes. By plugging those values in we get:
There is 6.25 grams left of Ra-229 after 12 minutes.