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3 years ago

What formula can I use to solve speed and temperature in soundwave

Physics

1 answer:

grandymaker [24]3 years ago

3 0

Explanation:

v=frequency multiply by lambda

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Which of the following CANNOT be

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Answer:

Well, there is a kind of magnet to pick up a coin.. I think you can pick up a needle with one too.. I think safety pins. depending on what its made of though.

Explanation:

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3 years ago

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A 56 kg sprinter, starting from rest, runs 49 m in 7.0 s at constant acceleration.what is the sprinter's power output at 2.0 s,

alexgriva [62]

The sprinter is in uniform accelerated motion, and its initial velocity is zero, so the relationship betwen space (S) and time (t) is
$S= \frac{1}{2} a t^2$
where a is the acceleration. Using the data of the problem, we can find a:
$a= \frac{2S}{t^2} = \frac{2 \cdot 49 m}{(7.0 s)^2} =2.0 m/s^2$
So now we can solve the 3 parts of the problem.

a) power output at t=2.0 s
The velocity at t=2.0 s is
$v(t)=at=(2.0 m/s^2)(2.0 s)=4.0 m/s$

the kinetic energy of the sprinter is
$K= \frac{1}{2} mv^2= \frac{1}{2}(56 kg)(4.0 m/s)^2=448 J$

and so the power output is
$P= \frac{E}{t} = \frac{448 J}{2.0 s} =224 W$

b) power output at t=4.0s
The velocity at t=4.0 s is
$v(t)=at=(2.0 m/s^2)(4.0 s)=8.0 m/s$

the kinetic energy of the sprinter is
$K= \frac{1}{2} mv^2= \frac{1}{2}(56 kg)(8.0 m/s)^2=1792 J$

and so the power output is
$P= \frac{E}{t} = \frac{1792 J}{4.0 s} =448 W$

c) Power output at t=6.0 s
The velocity at t=2.0 s is
$v(t)=at=(2.0 m/s^2)(6.0 s)=12.0 m/s$

the kinetic energy of the sprinter is
$K= \frac{1}{2} mv^2= \frac{1}{2}(56 kg)(6.0 m/s)^2=4032 J$

and so the power output is
$P= \frac{E}{t} = \frac{4032 J}{6.0 s} =672 W$

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3 years ago

Why does every element except hydrogen need at least one neutron and its nucleus?

scoray [572]

Answer:

It needs attractive force from the strong nuclear interaction to counter the electrostatic repulsion between the protons.

Explanation:

It has to counter

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3 years ago

6. If an object falls for 11.3 seconds, what is the distance it will fall

Paraphin [41]

The object will fall through a distance of 638.45 m.

Considering the question given above, the following data were obtained:

Time (t) = 11.3 s

<h3>Height (h) =? </h3>

<u>NOTE</u>: Acceleration due to gravity (g) = 10 m/s²

We can obtain the height as illustrated below:

H = ½gt²

H = ½ × 10 × 11.3²

H = 5 × 127.69

Therefore, the distance the object will fall is 638.45 m

Learn more: brainly.com/question/6424568

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3 years ago

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B horizontal in order to travel directly across the river.

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What formula can I use to solve speed and temperature in soundwave​

What formula can I use to solve speed and temperature in soundwave