04 Touch-screen phones are made of many different materials.
Figure 3 shows the main materials in a touch-screen phone.
Figure 3
other
15%
iron
20%
plastic
45%
copper
7%
glass
Calculate the percentage by mass of glass in a touch-screen phone. *
1 point

What happens to atoms and chemical bonds during a reaction?

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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?