The northern hemisphere is warmer in spring than in winter, because in spring

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?