4. a safe is hurled down from the top of a 1.3 x 102 m
building at a speed of 11.0 m/s. what is its velocity as
it hits the ground?

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?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

The air that we breath is made mostly of which gaseous molecule