Question

enrique is given information about a satellite orbiting earth.
r = 3.8 × 10⁸ m
t = 18 days
in order to calculate the tangential speed of the satellite, what should enrique do first?
○ convert the radius to kilometers
○ convert the orbital period to seconds
○ find the square root of the radius
○ find the square root of the orbital period

Explanation:

The formula for tangential speed \( v=\frac{2\pi r}{T} \), where \( r \) is radius (in meters) and \( T \) is period (in seconds) for consistent SI units. The radius is already in meters (\( 3.8\times10^{8}\space m \)), but the period \( T = 18\) days needs to be converted to seconds (SI unit of time) first to use in the formula. Converting radius to kilometers or taking square roots of radius/period is not necessary for the first step here.

Answer:

B. convert the orbital period to seconds