A fisherman 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 2.80 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m . The fisherman sees that the wave crests are spaced a horizontal distance of 5.50 m apart. Part A How fast are the waves traveling? Express the speed v in meters per second using three significant figures. Part B What is the amplitude A of each wave? Express your answer in meters using three significant figures.

A. 1.96 m/s.

B. 0.35 m.

C. 0.15 m.

Explanation:

A.

Velocity of a wave,v = f * lambda

Where,

f = frequency of the wave

Lambda = wavelength

Given:

T = 2.8 s

f = 1/T

= 1/2.8

= 0.36 hz

Lambda = 5.50 m

V = 5.5 * 0.36

= 1.96 m/s.

B.

Amplitude, a = distance/2

= 0.7/2

= 0.35 m.

C.

Amplitude, a = 0.3/2

= 0.15 m.

answer; i believe the correct answer is (40,000 j) good luck

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .