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3 years ago

What is the wavelength of an FM radio wave of frequency 90Mhz?

Physics

1 answer:

jok3333 [9.3K]3 years ago

7 0

Answer:

3.3m

Explanation:

Given parameters:

Frequency = 90Mhz

Unknown:

Wavelength = ?

Solution:

To find the wavelength, use the expression below;

V = f x wavelength

V is the speed of light = 3 x 10⁸m/s

f is the frequency

Now;

Insert the parameters

3 x 10⁸ = 90 x 10⁶ x wavelength

Wavelength = $\frac{3 x 10^{8} }{9 x 10^{7} }$ = 3.3m

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We now slowly increase the pressure to 15464.04 Pa while keeping the temperature constant. What is the final volume?

Mila [183]

Answer:

Final volume = 0.42 cubic meters

Explanation:

The question is incomplete. The initial conditions are

Initial temperature , $T_{1}$ = 310 K

Initial volume , $V_{1}$ = 0.5 cubic meter

Number of moles = 2.5

Since, from the ideal gas equation we get,

PV = nRT

P $\times 0.5 = 2.5 \times 8.314 \times 310$

$P_{1}$ = 12886.7 Pa

Final pressure= 15464.04 Pa

Since temperature is constant,

PV = constant

$12886.7 \times 0.5 = 15464.04 \times V$

V = 0.42 cubic meters.

Hence final volume = 0.42 cubic meters

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3 years ago

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madam [21]

Answer:

stomp???, frictional force

Explanation:

this allow ur foot to be stomp

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3 years ago

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A batter swings at a baseball. The action force is the bat hitting the ball with a force of 5N. What is the reaction force?

stepan [7]

According to Newtons third law the force of action has an equal and opposite reaction. So if the force of the bat hitting the ball is equal to 5 N, then reaction force of the ball has to be 5 N as well. So the correct answer is: the reaction force is equal to 5 N.

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3 years ago

Write the equation of the line that has an undefined slope and passes through the point (4, 7). User: What is the slope of a lin

DerKrebs [107]

For the first question we use point-slope form of an equation

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then we plug in the known values

y=m(x-4)+7

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For Question 2

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For Question 3

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Δy/Δx
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now we plug in the known values from the two points given

(5-7)/(-3-1)
-2/-4
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and For the Final Question

a translation left or right is done by affecting the x variable if you add 2 to x then the x value will have to be 2 less to get the same result...in other words when x is 1 the value of y is also 1...but if I wanted the whole equation translated left 2 unites then I would want the same y-value at an x-value 2 smaller... in other words, in our example x will be -1 when y is 1. For this value found on the graph to match the equation our x value must have 2 added to it in the equation....therefore the equation that translates y=|x| two units left is...

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SashulF [63]

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