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Vilka [71]
3 years ago
15

A skateboarder has an acceleration of −1.9 m/s2. If her initial speed is 6 m/s, how long does it take her to stop?

Physics
1 answer:
SSSSS [86.1K]3 years ago
6 0
You said that she's losing 1.9 m/s of her speed every second.

So it'll take

             (6 m/s) / (1.9 m/s²)  =  3.158 seconds  (rounded)

to lose all of her initial speed, and stop.
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A Carnot engine operates with an efficiency of 26.0% when the temperature of its cold reservoir is 281 K. Assuming that the temp
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Answer:

The temperature of cold reservoir should be 246.818 K for efficiency of 35%

Explanation:

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Answer:

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<u>Step 1:</u> Data given

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