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2 years ago

What happens to the frequency of a wave of you increase the speed of the wave ?

Physics

1 answer:

exis [7]2 years ago

3 0

Nothing happens. The frequency is determined at the source,
and it doesn't change along the way.

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Steam enters a one-inlet, two-exit control volume at location (1) at 360°C, 100 bar, with a mass flow rate of 2 kg/s. The inlet

yaroslaw [1]

Answer:

The inlet velocity is 21.9 m/s.

The mass flow rate at reach exit is 1.7 kg/s.

Explanation:

Given that,

Mass flow rate = 2 kg/s

Diameter of inlet pipe = 5.2 cm

Fifteen percent of the flow leaves through location (2) and the remainder leaves at (3)

The mass flow rate is

$m_{2}=0.15\times2$

We need to calculate the mass flow rate at reach exit

Using formula of mass

$m_{3}=m_{1}-m_{2}$

$m_{3}=2-0.15\times2$

$m_{3}=1.7\ kg/s$

We need to calculate the inlet velocity

Using formula of velocity

$v=\dfrac{m}{\rho A}$

Put the value into the formula

$v=\dfrac{2}{42.868\times\dfrac{\pi}{4}\times(5.2\times10^{-2})^2}$

$v=21.9\ m/s$

Hence, The inlet velocity is 21.9 m/s.

The mass flow rate at reach exit is 1.7 kg/s.

7 0

3 years ago

Identify two factors that increase the electric force between objects

jok3333 [9.3K]

Answer: The distance between particles, and the amount of electric charge they carry.

Explanation:

Charles Coulomb wanted to figure out the strength of the force between two objects and these were the two most independent factors.

8 0

2 years ago

A centrifuge in a biology laboratory rotates at an angular speed of 3,400 rev/min. When switched off, it rotates 48.0 times befo

IgorLugansk [536]

Answer:

- 210 rad/s²

Explanation:

n = frequency of rotation = 3400/60 = 170/3 per sec.

angular velocity ω ( 0 ) at time 0 = 2π n = 2π x 170/3

angular velocity at time t = ω(t) = 0

now, ω²( t) = w²(o) + 2α Φ ( α = angular acceleration and Φ = angular displacement) = 2π x 48 rad.

0 = ( 2π x 170/3 )² + 2α x 48 x 2π

α = - (2π x 170 x 170 )/ (3 x 3 x 2 x 48 ) = 210 rad / s²

7 0

3 years ago

A beam of light passes through a liquid into air. Angle 1, angle of

Ede4ka [16]

Answer: 1.57

Explanation:

This described situation is known as Refraction, a phenomenon in which light bends or changes its direction when passing through a medium with a index of refraction different from the other medium.

In this context, the index of refraction is a number that describes how fast light propagates through a medium or material.

According to Snell’s Law:

$n_{1}sin(\theta_{1})=n_{2}sin(\theta_{2})$ (1)

Where:

$n_{1}$ is the first medium index of refraction (the value we want to know)

$n_{2}=1$ is the second medium index of refraction (air)

$\theta_{1}=23\°$ is the angle of incidence

$\theta_{2}=38\°$ is the angle of refraction

Now, let's find $n_{1}$ from (1):

$n_{1}=n_{2}\frac{sin \theta_{2}}{sin \theta_{1}}$ (2)

Substituting the known values:

$n_{1}=1\frac{sin(38\°)}{sin(23\°)}$

Finally:

$n_{1}=1.57$

3 0

3 years ago

Differentiate between a derived quantity and a derived unit.

Inessa [10]

Explanation:

Derived quantities are quantities dependent on fundamental quantities while derived units are the units of these quantities

3 0

2 years ago