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navik [9.2K]
2 years ago
8

Please i need answer for part d

Physics
1 answer:
matrenka [14]2 years ago
4 0
It is c that’s what it is that’s the answer
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Kitty [74]

Answer:

Right

Explanation:

electromagnetic waves can travel through space (a vacuum) because it doesn't need a medium and its particles to propagate whereas a mechanical wave needs a medium to propagate. For example sound is a mechanical wave, sound vibrates off a mediums particles to propagate and for sound to be heard and travel

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3 years ago
Below is an oscilloscope trace from an AC supply. Calculate the frequency of the supply if each horizontal division represents 0
GuDViN [60]

Answer:

20 hertz of frequency produced.

Explanation:

\boxed{frequency = \frac{1}{period} }

Here we will find frequency and period should be in second, here given: 0.05 seconds

using the formula:

\boxed{frequency = \frac{1}{0.05} }

\boxed{frequency =20}

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2 years ago
what distance is a book from the floor if the book contains 196 joules f potential energy and has a mass of 5 kg?
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E=mgh.   196=5kg*9.81m/s^2*h.  So h=196/(5*9.81)=4m
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Which change will cause the gravitational force between a baseball and a soccer ball to increase ? Check all that apply
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Moving the balls closer together pumping more air into the soccer ball putting the baseball in a plastic case 
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