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Mrrafil [7]
3 years ago
8

A wave emitted from a source has a frequency of 10 Hz and wavelength 2.5 m. How much time will it take to reach a person located

5 m from the source?
Physics
1 answer:
const2013 [10]3 years ago
4 0

Answer:

time taken by the wave to reach the person is 0.2 s

Explanation:

As we know that the speed of the wave is given as

v = \lambda f

here we know that the wavelength of the wave is

\lambda = 2.5 m

f = 10 Hz

now speed of the wave is given as

v = 10(2.5)

v = 25 m/s

Now time taken by the wave to reach 5 m distance is

t = \frac{L}{v}

t = \frac{5}{25}

t = 0.2 s

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lidiya [134]
Series,effective resistance =R₁+R₂+R₃...
parallel,effective resistance 1/R=1/R₁ +1/R₂ +1/R₃...
 
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3 years ago
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KatRina [158]

Answer:

D= Seven

Explanation:

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3 years ago
Why is the overall charge of the atom neutral or zero?
MrRissso [65]

Answer:

B

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and in the nucleus of an atom, there are protons and neutrons so you can see that A is not the answer

if you see the periodic table, you will know that the number of electrons and protons are equal, so the charges cancel each other out, hence the charge of an atom will be neutral

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instead, write, the it is neutral

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7 0
3 years ago
There are 2.2 pounds in a kilogram. if a boys mass is 40kg, what is his height in pounds?
sasho [114]
The simplest way to do this is to set up equivalent fractions, like this- 

\frac{1}{2.2} = \frac{40}{x}

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Therefore, the boy weighs 88lbs. 
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A recent home energy bill indicates that a household used 475475 kWh (kilowatt‑hour) of electrical energy and 135135 therms for
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Answer:

Explanation:

Given that,.

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475 KWh

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135 thermal gas for month

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135 thermal = 135 × 29.3 = 3955.5 KWh

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Since 1 hr = 3600 seconds

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5 0
3 years ago
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