Answer:
Explanation:
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In this case, according to the given information, it is possible to recall the equation to calculate the heat, Q, in these calorimetry problems as shown below:
Thus, given the absorbed heat, mass and temperatures, we can easily calculate the specific heat of the metal as shown below:
Then, by plugging in we obtain:
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1. opposite
2. positive
3. negative
There will be 7.5 g of Be-11 remaining after 28 s.
If 14 s = 1 half-life, 28 s = 2 half-lives.
After the first half-life, ½ of the Be-11 (15 g) will disappear, and 15 g will remain.
After the second half-life, ½ of the 15 g (7.5 g) will disappear, and 7.5 g will remain.
In symbols,
<em>N</em> = <em>N</em>₀(½)^<em>n</em>
where
<em>n</em> = the number of half-lives
<em>N</em>₀ = the original amount
<em>N</em> = the amount remaining after <em>n</em> half-lives
Answer: True
Explanation:
Scientists are not supposed to include their personal opinions in their results, it voids the validity of the entire experiment.