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AnnZ [28]
3 years ago
10

A wave traveling in water has a frequency of 250 Hz and a wavelength of 6.0m. What is the speed of the wave?

Physics
1 answer:
vladimir2022 [97]3 years ago
6 0
Since you are looking for the speed, you need to rearrange the formula which is f = speed / wavelength. That should give you speed = f (wavelength.) All you need to do next is to substitute the value to the following equation.  speed = 250 Hz (6.0m) that should leave you with 1500 m/s which is very fast.
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A horizontal circular wire loop of radius 0.7 m lies in a plane perpendicular to a uniform magnetic field that is pointing down
Maru [420]

Answer:

\epsilon=1.10\ V

Explanation:

It is given that,

Radius of the circular loop, r = 0.7 m

Magnetic field, B = 0.44 T

In 0.14 s the wire is reshaped from a circle into a square, but remains in the same plane.

Area of the circular wire,

A_1=\pi r^2

A_1=\pi (0.7)^2=1.539\ m^2

For the area of square,

The circumference of wire, C=2\pi r=2\pi \times 0.7=4.39\ m

Side of square, l=\dfrac{4.39}{4}=1.09\ m

Area of square, A_2=1.09^2=1.188\ m^2

An emf is induced in the loop due to change in its area. The induced emf is given by :

\epsilon=-B\dfrac{dA}{dt}

\epsilon=-B\dfrac{A_2-A_1}{t}

\epsilon=-0.44\times \dfrac{1.188-1.539}{0.14}  

\epsilon=1.10\ V

So, the magnitude of the average induced emf is 1.10 volts. Hence, this is the required solution.

3 0
3 years ago
A person with a remote mountain cabin plans to install her own hydroelectric plant. A nearby stream is 3.00 m wide and 0.500 m d
Lubov Fominskaja [6]

Answer:

The power she can generate is 185.22 KW.

Explanation:

<h3><u>DATA</u></h3>

3.00m wide and 0.500m deep.

Cross sectional area = 1.500m^2

Velocity = 1.35m/s

Volumetric flow rate = Av = 18.00m^3/s

Mass flow rate = 18,000kg/s

Height = 4.20m

25.0% efficiency

<h3><u> FORMULA:</u></h3>

P = dE / dt * eff

<h3><u>SOLUTION:</u></h3>

18,000kg/s (9.8m/s^2) (4.20m) (25%) = 185,220 watts

= 185 kw

6 0
3 years ago
You stare at a bright red screen for so long that your red cones become saturated and no longer function. The red screen is then
adell [148]

Answer: you'll see cyan color on the screen

Explanation:

Saturating the red cone causes them to stop functioning, hence you can't perceive the red part of white light. White light is made up of three main colors which are blue, red and green. When one can no longer perceive the red part of light, one is left with the grean and blue part. The green and blue part of light will superimpose to give a cyan color.

5 0
3 years ago
Read 2 more answers
Which of the following would be a valid method to increase the buoyant force acting on an object?
shepuryov [24]
I think it’s B hope this helps.
4 0
2 years ago
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Okay I better get a good answer for this guy I'm puttin' all my money on it.
Black_prince [1.1K]

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.

Explanation:

3 0
3 years ago
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