If a captain wants to take her boat (speed in still water: 5.0m/s) directly across a river with a a current of 3.5m/s, what upstream angle should she head at? ​

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Argon, neon, and xenon are examples of

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?