Why do electrons transfer charge and not protons?

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 sound characteristic is not affected by the relative motion of an object

How can you increase the strength of an electromagnet?