The star Vega is 25.4 light years from the sun. Alpha Centauri is 4.12 x 1013 km from the sun.
How many times farther is Vega from the sun than Alpha Centauri?

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?