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2 years ago

How is sound produced in our throat

1 answer:

4 0

In humans sound is produced by the voice box or the larynx.

The voice box is at the upper end of the wind pipe.

Two vocal cords are stretched across the voice box in such a way that it leaves a narrow slit between them.

Air passes through these slits. When air from lungs is forced out through the slit, the vocal cords vibrate to produce sound.

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What force is required to accelerate a body with the mass of 15 kilograms at a rate of 8m/s2?

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Force = mass * acceleration
F = 15 *8 = 120 Newton

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2 years ago

A stone dropped from the top of a 80m high building strikes the ground at 40 m/s after falling for 4 seconds. The stone's potent

Sergeu [11.5K]

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Explanation:

See picture

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2 years ago

The battleship and enemy ships 1 and 2 lie along a straight line. Neglect air friction. battleship 1 2 Consider the motion of th

DaniilM [7]

Answer:

$\frac{t_1}{t_2} = \frac{sin\theta_1}{sin\theta_2}$

Explanation:

The vertical component of the initial velocities are

$v_v = v_0sin\theta$

If we ignore air resistance, and let g = -9.81 m/s2. The the time it takes for the projectiles to travel, vertically speaking, can be calculated in the following motion equation

$v_vt - gt^2/2 = s = 0$

$t(v_v - gt/2) = 0$

$v_v - gt/2 = 0$

$t = 2v_v/g = 2v_0sin\theta/g$

So the ratio of the times of the flights is

$t_1 / t_2 = \frac{2v_0sin\theta_1/g}{2v_0sin\theta_2/g} = \frac{sin\theta_1}{sin\theta_2}$

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2 years ago

I think I know this one but I don’t at the same time

galben [10]

Answer: B.) 6

Explanation:

To answer this problem you get the number of students who attended Wednesday (18) and the number of students who attended Tuesday (12) and subtract 18 - 12 = 6

Answer = B.) 6

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2 years ago

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Serga [27]

Answer:

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