Awave travels at a speed of 34 cm/s. it’s wavelength is 18 cm. what is the period of the wave? 0.75 s 1.2 s 0.66 s 0.53 s regions of compression and rarefaction define electromagnetic waves longitudinal waves, but not transverse waves transverse waves, but not longitudinal waves all mechanical waves

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

i think the answer is a and b

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