All categories

3 years ago

Which statement best describes what happens when a sound source is moving? (1 point)

Physics

1 answer:

GREYUIT [131]3 years ago

5 0

Answer:

As the sound approaches the observer, the pitch increases; as it passes the observer, the pitch decreases.

Explanation:

The crests come closer when it approaching, and go farther when the source passes the observer.

You might be interested in

Use Poiseuille's Law to calculate the rate of flow in a small human artery where we can take η = 0.028, R = 0.008 cm, l = 2 cm,

FrozenT [24]

Answer:

1.435 x 10^-4 cm^3/s

Explanation:

coefficient of viscosity, η = 0.028 poise

Radius, R = 0.008 cm

length, l = 2 cm

Pressure, P = 5000 dyne/cm^2

The Poiseuille's formula is given below

$V=\frac{\pi PR^{4}}{8\eta l}$

Where, V is the rate of flow, that means volume flowing per second

$V=\frac{3.14\times5000 \times {0.008}^{4}}{8 \times 0.028 \times 2}$

V = 1.435 x 10^-4 cm^3/s

Thus, the rate of flow is 1.435 x 10^-4 cm^3/s.

8 0

4 years ago

What do astronomers use to calculate the age of the universe

kykrilka [37]

The age of the oldest stars ,

Patterns of background radiation ,

How fast distant galaxies are moving away from us.

6 0

3 years ago

Read 2 more answers

Question 7

VLD [36.1K]

Answer: m= 4kg

Explanation:

Use equation for force:

F=m*a

F=20 N

a=5 m/s²

m=?

1N=kg*m/s²

---------

F=m*a

m=F/a

m=(20 kg*m/s²)/5m/s²

m=4kg

3 0

3 years ago

The wavelength of violet light is about 425 nm (1 nanometer = 1 × 10−9 m). what are the frequency and period of the light waves?

BigorU [14]

1. Frequency: $7.06\cdot 10^{14} Hz$

The frequency of a light wave is given by:

$f=\frac{c}{\lambda}$

where

$c=3\cdot 10^{-8} m/s$ is the speed of light

$\lambda$ is the wavelength of the wave

In this problem, we have light with wavelength

$\lambda=425 nm=425\cdot 10^{-9} m$

Substituting into the equation, we find the frequency:

$f=\frac{c}{\lambda}=\frac{3\cdot 10^{-8} m/s}{425\cdot 10^{-9} m}=7.06\cdot 10^{14} Hz$

2. Period: $1.42 \cdot 10^{-15}s$

The period of a wave is equal to the reciprocal of the frequency:

$T=\frac{1}{f}$

The frequency of this light wave is $7.06\cdot 10^{14} Hz$ (found in the previous exercise), so the period is:

$T=\frac{1}{f}=\frac{1}{7.06\cdot 10^{14} Hz}=1.42\cdot 10^{-15} s$

4 0

3 years ago

Read 2 more answers

A commuter train travels from the airport for half an hour at 110 km/hr until it reaches the

nikklg [1K]

Answer:

it would be 10km

Explanation:

because that reaches max height before it falls stupid

7 0

3 years ago