Which of the following are mechanical waves?

A. Waves that travel in empty space

B. Sound and ocean waves

C. Light waves

D. X-rays

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Your answer would be B sound and ocean waves.

The reason why of course is because mechanical waves are waves that travel through matter and not empty space (as for light travels through empty space and is therefore not a machanical wave). and x-rays are a spectrum of light so they aren't mechanical waves eather.

Hope it helped

c) up is the direction the magnetic force is acting on the charge.

the closer the planet is to the sun, the larger the gravity