How many atoms are in one mole of uranium? A. 6.02 x 10^-23
B. Avogadro's number
C. 6.02 x 10^24
D. 6,020,000,000,000,000,000,000,000

What is the role of the ocular lens?

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

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?