Water droplets I think
I’m sorry if I’m wrong but I’m pretty sure that’s the answer:)
Answer:
D) The sun is a burning ball of gas, and the moon revolves around a planet.
Explanation:
Unlike what Jack has written in his table, the sun is comprised of 92% gas and has no definable rocky layer or even dust. The moon revolves specifically around the Earth.
Ohms law E=IxR.
E=emf/voltage
I = current
R= resistance
I=E/R
I=120/10
I= 12 amps
The possible options for the proposed multiplication or division of measurements are:
1. 9.0 km * 7.0 km = 63 km²; this is a correct option because km² is dimensionally correct.
3. 24 dL²/0.60 L = 0.24 L²/0.60 L = 0.4 L is a correct option since L is a unit of volume.
<h3>What are the possible options among the proposed multiplication or division of measurements?</h3>
The possible options among the proposed multiplication or division of measurements are those which are dimensionally correct.
Considering the given options:
1. 9.0 km * 7.0 km = 63 km²
This is a correct option because km² is dimensionally correct as it is a unit of area.
2. 2.0 g² * 0.043 kg is not correct since there is no unit of square mass.
3. 24 dL²/0.60 L = 0.24 L²/0.60 L = 0.4 L is a correct option since L is a unit of volume.
In conclusion, the correct measurements options are those that are dimensionally correct.
Learn more about measurements at: brainly.com/question/777464
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The answer is 6×10⁹ years.
K-Ar dating is radioactive dating method used to measure a time elapsed since the rock is cool enough to trap Ar after a radioactive decay of 40K to 40Ar. It can be expressed as:
where:
- elapsed time
- half-life of K40
- amount of K40
<span>
- amount of Ar40
</span>
We know that a half-life of K40 is 1.251<span>×10⁹ years:
</span>
We do not know absolute value of amount of K40 and Ar40, but we know percentage and can express them as following:
<span>
</span>
So:
⇒ t = <span>6×10⁹
</span>
Thus, the rock is old <span>6×10⁹ years.</span>