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4 years ago

5

Radio waves travel at the speed of light, 3.0 × 108 m/s. What is the wavelength of a radio wave from an AM station broadcasting

at a frequency of 7.5 × 105 Hz? (λ = v/ f)

2 answers:

pochemuha4 years ago

6 0

Answer:

4 × 10^2 M

Step-by-step explanation:

We are given;

Speed of light as 3.0 × 10^8 m/s

Frequency of radio wave as 7.5 × 10^5 Hz

We are required to determine the wavelength.

Using the formula;

wavelength, λ = v/f

Note; Radio wave is an electromagnetic wave, therefore travels with the speed of light.

Therefore;

wavelength, λ = 3.0 × 10^8 m/s ÷ 7.5 × 10^5 Hz

= 4 × 10^2 M

Hence, the wavelength of the radio wave is 4 × 10^2 M

inna [77]4 years ago

6 0

Answer:

4*10^2m

Step-by-step explanation:

We are given;

Speed of light as 3.0 × 10^8 m/s

Frequency of radio wave as 7.5 × 10^5 Hz

We are required to determine the wavelength.

Using the formula;

wavelength, λ = v/f

Note; Radio wave is an electromagnetic wave, therefore travels with the speed of light.

Therefore;

wavelength, λ = 3.0 × 10^8 m/s ÷ 7.5 × 10^5 Hz

= 4 × 10^2 M

Hence, the wavelength of the radio wave is 4 × 10^2 M

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The ratio of destroyers to battleships in the navy is 20:15. If the total number of boats is 105, how many battleships are there

Elina [12.6K]

Answer:

45

Step-by-step explanation:

20:15 the ratio can be turned to a fraction

20/15

simplify

4/3

so now add the numerator and the denominator and get 7

then do 105/7=15

and then you do

4x15=60 (Destroyers)

3x15=45 (Battleships)

45 is your answer

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3 years ago

The perimeter of the window of the camper shell is 130 in. Find the length of one of the shorter sides of the window.

erik [133]

You can't deduce the length of a side from the perimeters of a rectangle.

Say that $s$ and $S$ are, respectively, the short and long side of the rectangle.

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But we can't solve exactly for $s$ nor for $S$ , unless more information is given.

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3 years ago

At time tequals0, water begins to drip out of a pipe into an empty bucket. After 14 minutes, there are 7 inches of water in th

Vaselesa [24]

Answer:

$w=0.5t$

Step-by-step explanation:

Given:

'w' represents inches of water left after 't' minutes of time.

The dripping out of water is a linear function.

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After 14 minutes, there are 7 inches of water in the bucket.

A linear function model is of the form: $w=mt+b$

$Where, m\to\textrm{dripping rate of water}\\b\to\textrm{water level at t=0}$

Now, at $t=0,w=0(\textrm{As bucket was empty})$

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$0=m(0)+b\\0=0+b\\b=0\\\\7=14m+0\\m=\frac{7}{14}=0.5\ in/min$

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3 years ago

The local zoo has some kangaroos and some rabbits, There are 70 feet and 26 heads in total. How many kangaroos and how many rabb

prisoha [69]

Answer:

y=17

Step-by-step explanation:

4x+2y=70

x+y=26

2x+2y=52

2x=18

x=9

y=26-9

y=17

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3 years ago

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A rectangular computer screen measures 17 inches on the diagonal.The Width is 15 inches. What is the height of the screen?

Elza [17]

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3 years ago