To determine how long it takes for a radio signal to travel from a satellite to the surface of the Earth, we need to use the formula:
\[ \text{Time} = \frac{\text{Distance}}{\text{Speed}} \]
Given:
- Distance (height of satellite) = \( 7.5 \times 10^6 \) meters
- Speed of radio signals = \( 3 \times 10^8 \) meters per second
Plugging in the values, we get:
\[ \text{Time} = \frac{7.5 \times 10^6 \, \text{meters}}{3 \times 10^8 \, \text{meters/second}} \]
\[ \text{Time} = \frac{7.5}{3} \times \frac{10^6}{10^8} \, \text{seconds} \]
\[ \text{Time} = 2.5 \times 10^{-2} \, \text{seconds} \]
Therefore, the correct answer is:
\[ 2.5 \times 10^{-2} \, \text{seconds} \]
10.
Radio signals travel at a rate of 3 × 108 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of the Earth if the satellite is orbiting at a height of 7.5 × 106 meters?
2.5 × 102 seconds
6 seconds
2.5 × 10–2 seconds
4.0 × 103 seconds
1 answer
1 answer