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3 years ago

A vibrating object is necessary for the production of sound * 1 point True False

Physics

1 answer:

gavmur [86]3 years ago

3 0

True! All sounds come from some type of vibrating object. Hopefully I helped!

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Calculate the frequency of visible light having a wavelength of 410 nm

maria [59]

Given: Wavelength λ = 410 nm convert to Meters m = 4.10 x 10⁻⁷ m

Speed of light c = 3 x 10⁸ m/s

Required: Frequency f = ?

Formula: c = λf

f = c/λ

f = 3 x 10⁸ m/s/4.10 x 10⁻⁷ m

f = 7.32 x 10¹⁴/s or 732 Thz (Terahertz)

6 0

3 years ago

Sort the units based on the measurement system they're used in

timurjin [86]

Answer:

Kelvin

Explanation:

fact as per the guideline given

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3 years ago

A container of gas molecules is at a pressure of 2 atm and has amass density of 1.7 grams per liter. All of the molecules in the

Tpy6a [65]

Answer:

The speed of nitrogen molecule is 1.87 m/s.

Explanation:

Given that,

Pressure = 2 atm

Density = 1.7 grams/liter

Atomic weight = 28 grams

We need to calculate the temperature

Using formula of idea gas

$PV=nRT$

$P=\dfrac{WRT}{VM}$

$P=\dfrac{\rho RT}{M}$

$T=\dfrac{PM}{\rho R}$

Put the value into the formula

$T=\dfrac{2\times28}{1.7\times0.0821}$

$T=401.2\ K$

We need to calculate the speed of nitrogen molecule

Using formula of RMS speed

$V_{rms}=\sqrt{\dfrac{3RT}{M}}$

$V_{rms}=\sqrt{\dfrac{3\times0.0821\times401.2}{28}}$

$V_{rms}=1.87\ m/s$

Hence, The speed of nitrogen molecule is 1.87 m/s.

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3 years ago

The world's largest wind turbine has blades that are 80 m long and makes 1 revolution every 5.7 seconds. What is the velocity fo

Arturiano [62]

Answer:

The velocity of the blades is 88.185 m/s.

Explanation:

Given;

length of the blade, r = 80 m

angular speed, ω = 1 rev per 5.7 seconds

The velocity of the blades is calculated by applying the following circular motion equation that relates linear velocity (V) and angular speed (ω);

$V = \omega r\\\\V = (\frac{1 \ rev}{5.7 \ s} \times \frac{2 \pi \ rad}{ 1 \ rev} )(80 \ m)\\\\V = 88.185 \ m/s$

Therefore, the velocity of the blades is 88.185 m/s.

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3 years ago

When waves interfere together and result in a quieter sound is called

Alexus [3.1K]

That is called fully constructive interference.

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3 years ago