Ariver flows at a speed of 3 mph towards sea. a woman in a canoe can paddle through water at a speed of 7 mph. she wishes to paddle for a total time of 2 hours, first upstream (away from the sea) then turning round and paddling back to her starting point. how long should she paddle upstream?

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

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?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n