Light travel through space at a constant speed of about 3×10^5km/s earth is about 1.5×10^8km from the sun how long does it take for light from the sun to reach earth?

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Light travel through space at a constant speed of about 3×10^5km/s earth is about 1.5×10^8km from the sun how long does it take for light from the sun to reach earth?

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Answer 1 · 2018-04-14T08:23:06

500 seconds

Explanation:

Divide the distance by the speed to find the time

$\frac{1.5 \times 10^{8}}{3 \times 10^{5}}$ $[1.5xx10^8]/(3xx10^5)$ = $0.5 \times 10^{3}$ $0.5xx10^3$ =500 secs

If you struggle with scientific notation

$\frac{150, 000, 000}{300, 000}$ $[150,000,000]/(300,000)$ = $\frac{1500}{3}$ $[1500]/3$ =500

Answer 2 · 2018-04-14T08:28:07

$Time = 500 s$ $"Time"= 500" s"$

Explanation:

Starting with the equation:

$Distance = Speed \times Time$ $"Distance" = "Speed" xx "Time"$

We shall solve the equation for $Time$ $"Time"$ in terms of $Distance$ $"Distance"$ and $Speed$ $"Speed"$ :

$Time = \frac{Distance}{Speed}$ $"Time"= "Distance"/"Speed"$

Substitute $Distance = 1.5 \times 10^{8} km$ $"Distance" = 1.5xx10^8" km"$ and $Speed = 3 \times 10^{5} km/s$ $"Speed" = 3xx10^5" km/s"$

$Time = \frac{1.5 \times 10^{8} km}{3 \times 10^{5} km/s}$ $"Time"= (1.5xx10^8" km")/(3xx10^5" km/s")$

$Time = 500 s$ $"Time"= 500" s"$

Answer 3 · 2018-04-14T08:35:20

500 Seconds

Explanation:

Distance = Speed x Time
Time = Distance/Speed
$t = \frac{1.5 \cdot 10^{8}}{3 \cdot 10^{5}}$ $t=(1.5*10^8)/(3*10^5)$
$t = \frac{10^{3}}{2}$ $t=(10^3)/2$
$t = 500$ $t=500$ Seconds

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Light travel through space at a constant speed of about 3×10^5km/s earth is about 1.5×10^8km from the sun how long does it take for light from the sun to reach earth?

3 Answers

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