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nata0808 [166]
3 years ago
10

The use of sound waves helps scientists find out how deep parts of the ocean are. The scientists do this by sending a sound wave

to the floor of the ocean and recording the time it takes to return to a machine. What did the inventor of this machine need to know while developing the machine?
Physics
1 answer:
Scilla [17]3 years ago
4 0
Dredging is what the inventor of this machine need to know while developing the machine.
Hope this helps!
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A child of mass 27 kg swings at the end of an elastic cord. At the bottom of the swing, the child's velocity is horizontal, and
snow_tiger [21]

Answer:

The magnitude of the rate of change of the child's momentum is 794.11 N.

Explanation:

Given that,

Mass of child = 27 kg

Speed of child in horizontal = 10 m/s

Length = 3.40 m

There is a rate of change of the perpendicular component of momentum.

Centripetal force acts always towards the center.

We need to calculate the magnitude of the rate of change of the child's momentum

Using formula of momentum

\dfrac{dp}{dt}=F

\dfrac{dP}{dt}=\dfrac{mv^2}{r}

Put the value into the formula

\dfrac{dP}{dt}=\dfrac{27\times10^2}{3.40}

\dfrac{dP}{dt}=794.11\ N

Hence, The magnitude of the rate of change of the child's momentum is 794.11 N.

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11Alexandr11 [23.1K]

The answer would be acceleration.

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Rufina [12.5K]

Answer:

A ruby is measures a 9 on the Mohs Scale of Hardness, second only to diamond and matched with sapphire. This makes a ruby an extremely hard and durable gemstone.

A sapphire is the birthstone for September. It is also a traditional gift for those celebrating 5th or 45th anniversaries.

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NEED HELP ASAP!!!
sineoko [7]

Answer:

2,500 watts

Explanation:

I got this answer right on a test. I hope it works for you to.

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The container that most likely contains a liquid is container A.

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