Scientists use scientific notation to communicate extremely small measurements. Hence, option A is correct.
<h3>What scientific notation?</h3>
Scientific notation is a way of writing very large or very small numbers.
Scientists use scientific notation to represent very small or very large numbers because this notation increases the
- accuracy of measured quantities.
- convenience in using the numbers.
- the number of significant figures.
- precision of measurements.
Hence, option A is correct.
Learn more about the scientific notation here:
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Answer:
capable of being hammered out thin, as certain metals; malleable.
Explanation:
Answer:
a) Pex = 15 bar
b) work = 3000 J
Explanation:
<u>Step 1: </u>Data given
Volume of the gas = 2.5 dm³
Pressure of the gas = 3.00 bar
The gas is compressed at a constant pressure pex , so that the final volume is 0.5 dm³
The final temperature is the same as in the beginning.
<u>Step 2:</u> Calculate Pex
If the gas is compressed isothermally ( =constant temperature), then via the ideal gas law we can write:
P2 =Pex = (P1*V1)/V2
Pex = (3 * 2.5)/0.5
Pex = 15 bar
<u>Step 3:</u> Calculate the work
If Pex is constant, then is:
w = −
∫Pex *dV = -Pex *ΔV = -15 *(0.5-2.5)dm³ = 30dm³ bar
30dm³ bar * 10^5 Pa
/bar * 0.1³ m³/dm³ =3000 kg*m²/s² = 3000 J