boiling kettle  boiling oil

With voltages above about 200 kV, in addition to efficiency we must consider the Compton effect, that is, the emission of x-radiation in a preferred direction instead of radiation with a spherical characteristic.

Makes me tempted to reopen your files and refiddle with the promotion material.

One bit of political speculation doing the rounds just before Christmas was that having lost the battle last year to kill off HS2 in its entirety, frustrated No. 10 advisers are now determined to settle the score by lopping off the eastern arm?