How is sound is different from music how loundness od sound mention some ways to reduce

Physics

1 answer:

kondor19780726 [428]3 years ago

3 0

not too sure on this one maybe to locate objects under water, to diagnose problems, to treat medical ailments

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How does a Freebody diagram tell you about the net force an object?

Sloan [31]

So you subtract the numbers that are on the same axis. So if your gravitational force is 10 and your normal force is 5 you do 5-10 to get -5 since gravity acts downward

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3 years ago

Would a bottleneck event of the plants in an area from the video at the top of this page result in the need for primary or secon

andriy [413]

The bottleneck event of the plants in an area results in secondary succession.

<h2>What is bottleneck event?</h2>

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<h3>Secondary succession</h3>

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2 years ago

Explain how soilds non metals are different from solid metals

marysya [2.9K]

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3 years ago

Do we include signs if we calculate Electric field strength?

expeople1 [14]

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If a boat and its riders have a mass of 900 kg and the boat drifts in at 1.4 m/s how much work does sam do to stop it?

Rama09 [41]

The initial kinetic energy of the boat and its rider is
$K_i = \frac{1}{2} mv_i^2 = \frac{1}{2}(900 kg)(1.4 m/s)^2=882 J$

After Sam stops it, the final kinetic energy of the boat+rider is
$K_f = 0 J$
because its final velocity is zero.

For the law of conservation of energy, the work done by Sam is the variation of kinetic energy of the system:
$W=K_f-K_i =0-882 J=-882 J$
where the negative sign is due to the fact that the force Sam is applying goes against the direction of motion of the boat.

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3 years ago