i got (D, B)
1.) Which is not a medium through which a mechanical wave could travel?
A.) liquid water
B.) oxygen gas
C.) jump rope
D.) empty space

2.) Waves from the sun .
A.) are called mechanical waves
B.) transfer energy from the sun to Earth
C.) cause the Earth to vibrate
D.) require a medium through which to travel

An ideal gas is held in a container at constant volume. initially, its temperature is 5 degrees c and its pressure is 1.2 atm. what is its pressure when its temperature is 43 degrees c? answer in units of atm

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?

Which of the following are guidelines to follow for obtaining accurate observations