Answer:
To determine the age of the papyrus scroll, we can use the concept of radioactive decay and the half-life of 14C.
The half-life of 14C is 5730 years, which means that after each 5730-year period, half of the 14C in a sample decays. Since the papyrus scroll has 90% of the initial 14C remaining, it means that 10% has decayed.
Let X be the number of half-lives that have passed. We can calculate X using the following equation:
(1/2)^X = 10%
Now, let's solve for X:
X = log(10%) / log(1/2)
X ≈ 3.32
So, approximately 3.32 half-lives have passed.
Now, we can calculate the age of the scroll:
Age = Number of half-lives * Half-life
Age = 3.32 * 5730 years ≈ 19000.6 years
Rounded to the nearest year, the age of the papyrus scroll is approximately 19,001 years.
Answer
33,000,000 joules or 33MJ
Explanation:
The formula for calculating the heat released by a substance is expressed as shown below;
where;
Q is the amount of heat released
p is the power expended
t is the time it takes
Then;
Given the current I = 100A, supply voltage V = 220V and required time t = 25mins
t = 25 * 60 = 1500 seconds
Substituting these values in the formula that we have;
That is false. I just took the test and it is not the wavelength. The correct answer is antinode NOT wavelength.
b. disorder that rapidly kills brain cells and causes dementia
c. fear of being away from the primary caregiver
d. when a child believes that nothing exists outside him/herself, and s/he is incapable of understanding someone else's position