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const2013 [10]
4 years ago
9

If a star contains a certain element, it can be determined by studying the star’s

Physics
1 answer:
valentina_108 [34]4 years ago
3 0
A. Emission spectrum
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A car moving at a speed of 20 m/s, then accelerates uniformly at until it reaches a speed of What distance does it travel during
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An airplane starts from rest and reaches a takeoff velocity of 60.0m/s due north in 4.0 s. How far has it traveled before takeof
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How is distance related to force in this experiment to mass
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3 years ago
If Karen rode her bicycle 5 km to school in 30 minutes, what was her average speed? Give your answers in km/h.
Doss [256]

Answer:

10 km/h

Explanation:

Before calculating the average speed, we need to convert the time taken for the trip from minutes to hours. Since 1 hour cointains 60 minutes, we have:

1 h: 60 min = t : 30 min\\t=\frac{1 h \cdot 30 min}{60 min}=0.5 h

Karen's average speed is given by:

v=\frac{d}{t}

where

d = 5 km is the distance covered

t = 0.5 h is the time taken for the trip

Substituting into the equation, we find

v=\frac{5 km}{0.5 h}=10 km/h

5 0
3 years ago
After crossing the finish line, a race car slows down from 47 m/s to 32m/s in 3seconds. What is the car’s acceleration?
Lisa [10]

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Explanation: a = v - u/t

                         = 32 - 47/3

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7 0
3 years ago
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