True or False. An open circuit allows electricity to flow.

Hydrogen and helium are both members of?

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?