The graph shows the petroleum reserves that remain in five regions of europe. arrange
reserves
petroleum reserves in europe
20,000-
remaining petroleum reserves
1,00,000-
80,000 -
petroleum reserves
(millions of barrels of oil equivalent)
60,000
40,000
20,000-
14,017
4,025 4,035
036 4,04
region a
region b
region c
region d
region e
regions

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?