Answer:B
Explanation:
The speed of light in a vacuum is 2.998 x 108 m/s. How long does it take for light to circumnavigate the Earth, which has a circumference of around 24,900 miles? Do not enter "seconds" as part of your answer. Watch your Sig Figs!
Answer:
0.13 s
Explanation:
We'll begin by converting 24900 mile to metres (m). This can be obtained as follow:
1 mile = 1609.344 m
Therefore,
24900 mile = 24900 mile × 1609.344 m / 1 mile
24900 mile = 4.01×10⁷ m
Finally, we shall determine the time taken for light to circumnavigate the Earth, this can be obtained as follow:
Distance = 4.01×10⁷ m
Speed = 2.998×10⁸ m/s
Time =?
Speed = distance / time
2.998×10⁸ = 4.01×10⁷ / time
Cross multiply
2.998×10⁸ × time = 4.01×10⁷
Divide both side by 2.998×10⁸
Time = 4.01×10⁷ / 2.998×10⁸
Time = 0.13 s
Thus, it will take 0.13 s for light to circumnavigate the Earth.
How many moles are present in 63.80L of oxygen gas, O2?
Answer:
2.85moles of oxygen gas
Explanation:
Given parameters:
Volume of oxygen gas = 63.8L
Unknown:
Number of moles = ?
Solution:
We assume that the gas is under standard temperature and pressure. To find the number of moles, use the expression below:
1 mole of a gas at STP occupies a volume of 22.4L
So;
63.8L of oxygen gas will take up a volume of
[tex]\frac{63.8}{22.4}[/tex] = 2.85moles of oxygen gas
Jesim wants to help Nancy understand the movement that happens during one Earth year, Jassim holds a small globe representing Earth, and Nancy holds a large ball representing the Sun. What should Jessim do to show
Nancy what happens during one Earth year?
Jessim should not move except to slowly spin the globe
Jesim should slowly spin the globe and walk away from Nancy
Jessim should have Nancy walk around him while spinning the ball
Jessim should spin the globe quickly while walking in a circle around Nancy
Answer:
The answer is D jessim should spin the glove quickly while walking in a circle around nancy.
Explanation:
helppp nowwww plsss
Answer:
Barb tested the streak and luster.
Explanation:
Pls mark brainliest
Answer:
Mineral size and luster.
Explanation:
Convert 4.56 g/ml to lb-fl-oz
Answer:
g-lb 0.01005308
ml-fl Oz 0.1541919
The value of 4.56 g/mL is 0.296 lb/fl-oz.
Explanation:
Given:
The density with 4.56 g/mL
To find:
Convert 4.56 g/ml to lb/fl-oz
Solution:
In 1 pound there are 453.592 grams:
[tex]1 pound = 453.592 grams\\1 grams=\frac{1}{453.592 } pounds\\4.56 g/mL=4.56\times\frac{1}{ 453.592} lb/mL\\=0.0100 lb/mL[/tex]
In 1 fluid ounce there are 29.5735 milliliters:
[tex]1 \text{fluid ounce} = 29.5735 milliliter\\1 mL=\frac{1}{29.5735} fl-oz\\0.0100 lb/mL=\frac{0.0100}{\frac{1}{29.5735}} lb/fl-oz\\0.0100 lb/mL=0.0100 \times\frac{29.5735}{1} lb/fl-oz\\=0.296 lb/fl-oz[/tex]
The value of 4.56 g/mL is 0.296 lb/fl-oz.
Learn more about conversions here:
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