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Vesnalui [34]
3 years ago
5

Sara pushes her 45 kg younger sister with a force of 300 N to the right and encounters 120 N of friction. Calculate the little s

ister’s acceleration. Show steps please:)
Physics
1 answer:
Karo-lina-s [1.5K]3 years ago
8 0
The Net force is 280 N (300-120). The acceleration = force / mass = 280 / 45 = 6.2 m/s^2
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The frequency of the wave is 1\cdot 10^9 Hz

Explanation:

The frequency, the wavelength and the speed of a wave are related by the following equation:

c=f \lambda

where

c is the speed of the wave

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\lambda is the wavelength

For the radio wave in this problem,

\lambda = 0.3 m

c=300,000,000 m/s = 3\cdot 10^8 m/s

Therefore, the frequency is:

f=\frac{c}{\lambda}=\frac{3\cdot 10^8}{0.3}=1\cdot 10^9 Hz

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3 years ago
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soldier1979 [14.2K]

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Using several, at least 3, seismographs located at different geoghraphical locations and detecting earthquakes, geologists can extrapolate the epicenter of an earthquake using the time differences in arrivals of the two waves in each of the seismographs, using the mathematics of triangulation.

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7 0
3 years ago
A fisherman moves from one end of a boat to another
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Answer:

That isnt a question so no one will know the answer to what you are talking about. I suggest adding a sceenshot or picture of the question.

5 0
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Answer:

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