How does the medium move in relation to the direction of energy transport in a transverse wave

1, perpendicular
2, parallel
3, side by side
4, underneath

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Which accurately compares concave and convex lenses?

How can you increase the strength of an electromagnet?