Urgent help! Just answer the amount you prefer, no need to answer all :)) 1.) The data listed below are for mechanical waves. Which wave has the greatest energy?

amplitude = 7 cm; wavelength = 12 cm; period = 14 seconds
amplitude =12 cm; wavelength = 14 cm; period = 7 seconds
amplitude = 14 cm; wavelength = 7 cm; period = 12 seconds

2.) The main factors that determine the speed of a wave in any particular medium are .

density and temperature
stiffness and density
stiffness and size
size and temperature

3.) A wave travels 40 meters across a field of grass in 4 minutes. What is the speed of the wave?

0.17 m/s
10 m/s
240 m/s
320 m/s

4.) An ocean wave has a wavelength of 2 meters and a period of 5 seconds. What is the speed of the wave?

0.4 m/s
2.5 m/s
10 m/s
50 m/s

5.) The frequency of a wave is the inverse of the wave's ___

amplitude
velocity
wavelength
period

6.) Mechanical waves travel slowest in which physical state?

solid
liquid
gas
There is no pattern based on physical state.

7.) A fishing boat using sonar to locate fish is employing .

diffraction
reflection
refraction
interference

8.) Wave X has an amplitude of 5 and wave Y has an amplitude of 4. What will happen when the crest of wave X meets the crest of wave Y?

A crest with an amplitude of 1 will form.
A trough with an amplitude of 1 will form.
A crest with an amplitude of 9 will form.
A trough with an amplitude of 9 will form.