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Oksanka [162]
3 years ago
13

Find the speed of a 5.6-kg bowling ball that has a kinetic energy of 25.2 J.

Physics
1 answer:
Anit [1.1K]3 years ago
4 0
<u />E_{k} = \frac{1}{2} mv^{2}

\sqrt{ \frac{2 E_{k}}{m}  }

\sqrt{ \frac{2 (25.2)}{5.6}  } =3m/s
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The frequency of the given sound is 1.5khz then how many vibration it is completing in one second ?​
kompoz [17]

Answer:

1500 per second.

Explanation:

vibrations = 1.5 kilohertz

1.5×1000=1500

the answer is 1500 per second.

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3 years ago
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3. Imagine a 10kg block moving with a speed of 20m/s<br> calculate the kinetic energy of this block
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The formula of the kinetic energy is:
E_{k}  =  \frac{m v^{2} }{2}
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3 years ago
A boat moves through the water of a river at 10m/s relative to the water, regardless of the boat ‘s direction . If the water in
katen-ka-za [31]

Answer:

The appropriate solution is "61.37 s".

Explanation:

The given values are:

Boat moves,

= 10 m/s

Water flowing,

= 1.50 m/s

Displacement,

d = 300 m

Now,

The boat is travelling,

= 10+1.50

= 11.5 \ m/s

Travelling such distance for 300 m will be:

⇒ v = \frac{d}{t} \ sot \ t

      =\frac{d}{v}

On putting the values, we get

      =\frac{300}{11.5}

      =26.08 \ s

Throughout the opposite direction, when the boat seems to be travelling then,

= 10-1.50

= 8.5 \ m/s

Travelling such distance for 300 m will be:

⇒ v=\frac{v}{t} \ sot \ t

      =\frac{d}{v}

On putting the values, we get

      =\frac{300}{8.5}

      =35.29 \ s

hence,

The time taken by the boat will be:

= 26.08+35.29

= 61.37 \ s

8 0
3 years ago
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Explanation:

Charles Coulomb wanted to figure out the strength of the force between two objects and these were the two most independent factors.

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