All categories

4 years ago

Please help! 80 points will give brainiest!!!

Physics

2 answers:

AVprozaik [17]4 years ago

7 0

Answer:

The frequency, f, is 250 Hz. Hz is cycles per second. Hence a number divided by seconds.

The wavelength, λ, is 1.5 m.

The speed is v. Which is frequency times wavelength.

v = f xλ

Hence 250Hz*1.5m= 375 meters per second or 375 m/s

Explanation:

hope this helps mark me brainliest pls

lys-0071 [83]4 years ago

4 0

Explanation:

The expression for the speed of the sound in terms of frequency and the wavelength is as follows;

$v=\nu \lambda$

Here, v is the speed, $\nu$ is the frequency of the wave and $\lambda$ is the wavelength of the wave.

It is given in the problem that a sound wave has a frequency of 250 Hz and a wavelength of 0.35 m.

Calculate the speed of the sound wave.

$v=\nu \lambda$

Put $\nu= 250 Hz$ and $\lambda= 0.35 m$ .

$v=(250)(0.35)$

v= 87.5 m/s

Therefore, the speed of the sound wave is 87.5 m/s.

You might be interested in

Which refers to the measure of the amount of water vapor in yhe air?<br>

Pavlova-9 [17]

Answer:

The amount of water vapor in the air is called absolute humidity. The amount of water vapor in the air as compared with the amount of water that the air could hold is called relative humidity. This amount of space in air that can hold water changes depending on the temperature and pressure.

7 0

4 years ago

Read 2 more answers

An electron emitted from a filament is travelling at 1.5 x 105 m/s when it enters an acceleration of an electron gun in a televi

Crank

Answer:

The acceleration of the electron is 1.457 x 10¹⁵ m/s².

Explanation:

Given;

initial velocity of the emitted electron, u = 1.5 x 10⁵ m/s

distance traveled by the electron, d = 0.01 m

final velocity of the electron, v = 5.4 x 10⁶ m/s

The acceleration of the electron is calculated as;

v² = u² + 2ad

(5.4 x 10⁶)² = (1.5 x 10⁵)² + (2 x 0.01)a

(2 x 0.01)a = (5.4 x 10⁶)² - (1.5 x 10⁵)²

(2 x 0.01)a = 2.91375 x 10¹³

$a = \frac{2.91375 \ \times \ 10^{13}}{2 \ \times \ 0.01} \\\\a = 1.457 \ \times \ 10^{15} \ m/s^2$

Therefore, the acceleration of the electron is 1.457 x 10¹⁵ m/s².

7 0

3 years ago

Evelynn is measuring the pitch of a piano note. What unit of measurement is she most likely recording her value

sweet [91]

Answer:

hertz

Explanation: play piano

5 0

2 years ago

A(n) 69.8 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 60.4 m away from the shuttle

alukav5142 [94]

Answer:

The time taken is 6.7 min

Explanation:

Using the linear momentum conservation theorem, we have:

$m_1*v_{o1}+m_2*v_{o2}=m_1*v_{f1}+m_2*v_{f2}$

when she was 60.4m from the shuttle, she has zero speed, so the initial velocity is zero.

$m_1*0+m_2*0=m_1*v_{f1}+m_2*v_{f2}\\m_1*_{f1}=-m_2*v_{f2}\\v_{f1}=-\frac{m_2*v_{f2}}{m_1}\\\\v_{f1}=-\frac{0.886kg*12m/s}{69.8kg}\\\\V_{f1}=-0.15m/s$

That is 0.15m/s in the opposite direction of the camera.

the time taken to get to the shuttle is given by:

$t=\frac{d}{v_{f1}}\\\\t=\frac{60.4m}{0.15m/s}\\\\t=403s\\t_{min}=403s*\frac{1min}{60s}=6.7min$

6 0

3 years ago

Which statement is true about an object moving in a circular motion due to centripetal force, F, when the mass is doubled? A. It

Allushta [10]

Force = [Mass x (velocity)^2]/Radius
Therefore,
The mass and the force are directly proportional.If you double the mass,the force will be doubled too.

A. Its centripetal force would <span>be doubled.</span>

3 0

3 years ago