How many kilowatt-hours of energy does a 0. Watt light bulb use when left on continuously for 45 hours?

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?