Answer:
Percent error in meter stick measurement is 5.5%.
Explanation:
Given data:
Measured value = 25 cm
Accepted value = 23.7 cm
percent error = ?
Solution:
Subtract the accepted value from measured value divided by accepted value multiply by 100.
Formula:
(measured value - accepted value / accepted value ) × 100
Now we will put the values.
(25 cm - 23.7 cm/23.7 cm ) × 100
1.3 cm/23.7 cm ) × 100
0.055× 100
5.5%
Percent error in meter stick measurement is 5.5%.
The age of the ancient piece of wood that she located given the data is 1482 years
How to determine the number of half-lives
Original amount (N₀) = 100%
Amount remaining (N) = 83%
Number of half-lives (n) =?
2ⁿ = N₀ / N
2ⁿ = 100 / 83
2ⁿ = 1.2
Take the Log of both side
Log 2ⁿ = Log 1.2
nLog 2 = Log 1.2
Divide both side by Log 2
n = Log 1.2 / Log 2
n = 0.26
How to determine the age
Number of half-lives (n) = 0.26
Half-life (t½) = 5700 years
Time (t) =?
t = n × t½
t = 0.26 × 5700
t = 1482 years
Learn more about half life:
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Answer: 0.0450 moles of
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.
To calculate the moles, we use the equation:
Thus there are 0.0450 moles of
A reservoir serves as a long term storage area for water or nutrients