If today is October 12th and we view a first quarter, on what date will we observe the next third quarter?

What element breaks down into yttrium-90?

Use the de broglie's wave equation to find the wavelength of an electron moving at 7.3 × 106 m/s. show your work. note: h = plank's constant (6.62607 x 10-34 j s)

The semi-conductors on the periodic table are classified as