science sounds i dont know what to do

Question

Donna wants to calculate the speed at which a sound wave is traveling. She knows that the frequency of the wave is 680 hertz and that the wave has a wavelength of 0.5 meters.

What is the speed of the sound wave?

If you are attending a rock concert and the sound of the guitar is much louder than the singer’s voice, which of the following conclusions would be most reasonable?

The diagram below shows two longitudinal waves, wave X and wave Y, at one instant of their motion. Each oval represents a particle acted on by the energy of the wave as it moves from left to right. The number of ovals carrying wave X is equal to the number of ovals carrying wave Y. 

Comparing the two, it appears that wave X has a greater _______ than wave Y.

Which sound would be louder?

 A. 

a wave with an amplitude of 0.5

 B. 

a wave with an amplitude of 1.0

 C. 

a wave with an amplitude of 0.1

 D. 

a wave with an amplitude of 0

Amy is holding one end of a jump rope. Her friend Beth is holding the other end of the rope. Amy swiftly moves the handle of the jump rope downward, creating a large wave in the rope.

Will Beth feel a tug on the rope at her end?

 A. 

No, the only way Beth would feel a tug is if Amy pulls on the rope in the opposite direction.

 B. 

No, the wave cannot travel through a solid material such as a jump rope.

 C. 

Yes, the wave will transfer the energy of Amy's motion to the other end of the rope.

 D. 

Maria determines that the wavelength of a sound wave is 2.50 meters and that the wave is traveling at 340 m/s.

Put the waves below in order from the shortest wavelength to the longest wavelength.

1. 
2. 
3. 

A machine produces compression waves in a spring that is 120 cm long by pulsing twice every second. The back and forth movement of the pulse creates compressed sections of the spring that are 30 cm apart and travel toward the other end of the spring.

Which property of the wave does the value of two per second describe?

 A. 

intensity

 B. 

wavelength

 C. 

frequency

 D. 

amplitude

Answer 1

for the first part: you should have the equations in the text. If a value is given in Hertz then it is a frequency and must be converted to use the following equations.

EQ1 Speed = Wavelength / period

EQ2 period = 1/frequency