Answer:
10 km/hr
Explanation:
We are told that a jogger runs;
3km in 0.3 hr and
7 km in 0.7 hr
We are required to determine the average speed;
We need to know that average speed is given by;
Average speed = Total distance ÷ total time
In this case;
Total distance = 10 km ( 3km + 7 km)
Total time = 0.3 hr + 0.7 hr
= 1 hr
Thus;
Average speed = 10 km ÷ 1 hr
= 10 km/hr
Therefore, the average speed of the jogger is 10 km/hr
Answer:
The answer t your question is below:
Explanation:
When a salt is mixed with water, it will form ions, these ions are soluble in water.
Example: Ca(NO3)2 ⇒ Ca⁺² + 2 NO₃⁻¹
Both Ca⁺² and NO₃⁻¹ are soluble in water.
Then the answer to your question is:
<u>Soluble because all Ca+2 compounds are soluble in water
</u>
S<u>oluble because all NO3−1 compounds are soluble in water
</u>
1.079 x 10⁹ km/h
<h3>
Further explanation</h3>
2.998 x 10⁸ m/s has been known as the speed of light.
Let us convert the unit m/s to km/hour.
Change in unit length:
If 1 km = 1,000 cm, then
Change in unit time:
If , then
The Process:
Remember, we must write the results in scientific notation, i.e.,
Thus the result of unit conversion is
<h3>Learn more</h3>
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Keywords: speed of light, convert, m/s to km/h, unit length, time, hours, minutes, second, scientific notation
Answer:
D
Explanation:
Cuz i got it wrong and this was the right answer : )