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Lilit [14]
4 years ago
12

How long does it take light from the sun to reach earth?

Physics
2 answers:
Artyom0805 [142]4 years ago
8 0

It only take around eight minutes and 20 seconds for the Sun's rays to reach Earth.

storchak [24]4 years ago
5 0
It takes approximately 8 minutes and 20 seconds.
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a train travels 99 kilometers in 3 hours, and then 80 kilometers in 5 hours. What is it’s average speed?
Karolina [17]

Average speed = (total distance covered) / (time to cover the distance)

Total distance covered = (99km + 80km) = 179 km

Time to cover the distance = 8 hours

Average speed = (179km / 8hours)

Average speed = 22.375 km/hour

6 0
4 years ago
8 N to the Lefr and 4 N to the right find the net force is this balanced
olga_2 [115]

Answer:

4N to the left. No it is not balanced.

Explanation:

8 -4 = 4 N of force

Balanced would be if they equaled zero, so 8 to the left and 8 to the right

8 0
4 years ago
What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?
Scrat [10]

when observer and source moves relative to each other then the frequency received by the observer is different from the real frequency

This apparent change in frequency due to relative motion is known as Doppler's effect.

Here we know that

f_{app} = f_o\frac{v\pm v_o}{v \pm v_s}

here we know that

f_o = real frequency

v = speed of sound

v_o = speed of observer

v_s = speed of source

so this is known as Doppler's Effect

6 0
4 years ago
Read 2 more answers
What instrument can you use to measure the circumference of your waist?
wolverine [178]
<h2><em><u>Answer</u></em>:</h2>

<h3>A <u>measuring tape</u> can be used to measure the circumference of your waist.</h3>
3 0
4 years ago
Read 2 more answers
The equation of a progressive
Juliette [100K]

Answer:

Amplitude = 0.02m

Frequency = 640 Hz

Wavelength, λ = 0.5m

v = 320 m/s

Explanation:

Given the wave equation :

y=0.02 sin2π/0.5 (320t - x) where x and y are in

meters and t is in second

Comparing the above relation with the general wave equation :

y(x, t) = Asin2π/λ(wt - kx)

The amplitude, A = 0.02

From the equation :

2π/0.5 = 2π/λ

λ = 0.5 m

320t = vt

Hence, v = 320 m/s

Recall :

v = fλ

320 = f * 0.5

f = 320 / 0.5

f = 640 Hz

6 0
3 years ago
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