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Eva8 [605]
3 years ago
13

Also need help with 20 & 21 please

Physics
2 answers:
SSSSS [86.1K]3 years ago
5 0
Number 20 is B and 21 is C
Hoochie [10]3 years ago
5 0
A density is a physical change
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If a resistance is added in parallel to a circuit resistance is than?
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An Olympic runner competing in a long-distance event finishes with a time of 2 hours , 15 minutes , and 23 seconds . The event h
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The average speed of the runner is 18.2 km/h.

Explanation:

Hi there!

The average speed is calculated as the traveled distance over time:

speed = traveled distance / elapsed time to cover that distance

We have to find the speed in km/h, so let´s start converting the time into hours:

23 s · (1 min/60 s) = 0.38 min      

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The average speed of the runner is 18.2 km/h.

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3 years ago
ariel has 2.6 grams of zinc . what volume of the material does she have if zinc had density of 7.13 g/cm
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