If the time between the horn sounding and the people on the ship hearing the echo from the ship is 4 seconds, how far away is the ship from the cliff ? (velocity of sound in air is 331 m/s) Question options:

A. 1324 m

B. 662 m

C. 0.012 m

D. 820 m

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude

What is the rate of change in a objects position?

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?