Use the fact that the speed of light in a vacuum is about [tex]3.00 \times 10^8 \text{ m/s}[/tex] to determine how many kilometers a pulse from a laser beam travels in exactly twelve hours.
Answer (3)
The first thing that needs to be done is to find everything in the same units. 12 hours becomes 43200 seconds. Then find the distance traveled by light in that amount of time. Using the formula v=d/s, manipulate it so it looks like d=v*s. Then plug in the values: d=(3x10^8)*43200, d=1.3x10^13m. But you need to find this in kilometers. To do this, simply divide your answer by one thousand. Thus, a laser beam would travel 1.3x10^10 kilometers in 12 hours.
To calculate the distance a laser beam travels in twelve hours, we start with the speed of light in a vacuum, which is approximately 3.00 × 108 m/s. Since we're looking for the distance in kilometers, we can convert the speed of light to kilometers per second by dividing by 1,000, obtaining 3.00 × 105 km/s. Next, we need to calculate the total number of seconds in twelve hours, which is 12 hours × 60 minutes/hour × 60 seconds/minute = 43,200 seconds. Finally, we multiply the speed of light in kilometers per second by the total number of seconds:
Distance = speed × time = (3.00 × 105 km/s) × (43,200 s) = 1.296 × 1010 km
Therefore, a laser beam travels 1.296 × 1010 kilometers in twelve hours.
In twelve hours, a pulse from a laser beam travels approximately 1.296 × 1 0 10 kilometers. This was calculated by first converting hours into seconds and then using the speed of light. The final distance is presented in kilometers for clarity.
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