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Ivenika [448]
3 years ago
7

What is the acceleration of an object if it goes from a velocity of +25 m/s to rest in 5.0 s?

Physics
1 answer:
Bad White [126]3 years ago
7 0
The answer is A.) -5 m/s^2

The formula is as follows:

a = (final velocity - initial velocity) / (final time - initial time)
a = (-25 m/s)/ 5 s
a = -5 m/s^2

Thank you for posting your question. Please feel free to ask me more.
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The frequency of a wave is 200 Hz. The wavelength is 0.1 m. What is the period of the wave?
Aleks04 [339]
The formula for the period of wave is: wave period is equals to 1 over the frequency.waveperiod=\frac{1}{frequency}
To get the value of period of wave you need to divide 1 by 200 Hz. However, beforehand, you have to convert 200 Hz to cycles per second. So that would be, 200 cyles per second or 200/s.
By then, you can start the computation by dividing 1 by 200/s. Since 200/s is in fractional form, you have to find its reciprocal form and multiply it to one which would give you 1 (one) second over 200. This would then lead us to the value 0.005 seconds as the wave period.

wave period= 1/200 Hz
Convert Hz to cycles per second first
200 Hz x 1/s= 200/second
Make 200/second as your divisor, so:

wave period= 1/ 200/s

get the reciprocal form of 200/s which is s/200

then you can start the actual computation:

wave period= 1 x s divided by 200

this would give us an answer of 0.005 s. 
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How can you change the phases of matter using thermal energy
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Answer:

These energy exchanges are not changes in kinetic energy. They are changes in bonding energy between the molecules. If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance.

8 0
2 years ago
Which is the absolute location of St. Louis, Missouri?
devlian [24]

Answer:

The first is the closest in absolute values.

The second two are vague and the last is approximate.

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3 years ago
How long does it take light to travel from jupiter to earth?.
valentina_108 [34]
The answer is : 35 to 52 minutes.
Hope this helps!
Please give Brainliest!
7 0
2 years ago
If John travels 2,387 miles in 2 days, what's his average speed per hour?
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In 2 days there are 48 hours
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