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kenny6666 [7]
3 years ago
9

On a recent car ride, a student traveled the first 20 kilometers in 5 minutes, the next 60 kilometers in 50 minutes, and the las

t 10 kilometers in 5 minutes. What was the average speed of the car over the student's entire ride?
1.5 km/min


5 km/min

2 km/min

4 km/min
Chemistry
1 answer:
inn [45]3 years ago
6 0

Answer:

it is 90 km in one hour it is 90km/h

90/60=1,5

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Answer is: -963,8 kJ.
Q₁ = m(Fe) · C · ΔT₁.
C - specific heat capacity of liquid iron, C(Fe) = 0,82 J/g°<span>C.
</span>m(Fe) = 575 g.
ΔT₁ = 1181 - 1825 = -644°C.
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Q₂ = m(Fe) · C · ΔT₂.
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3 years ago
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<u>Ans: 650 J = 155 calories</u>


<u>Given:</u>

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Answer: The answer to the first one is the second option and the answer for the second one is the first option.

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