Jed drops a 1 kg box off of the Eiffel Tower. After 3 s, how fast is the box moving? g = 9.8 m/s. v = v0 + at

A. 44.1 m/s
B. 29.4 m/s
C. 9.8 m/s
D. 3.3 m/s

Why do scientists believe that light is made of streams of particles? scientists believe that light is made of streams of particles because only the presence of photons can explain phenomena observed during experiments on the photoelectric effect. these observations include only some frequencies of light causing the ejection of electrons, no time gap existing between light striking a metal and electrons being ejected, and intensity having no effect on the kinetic energy of the ejected electrons.

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?

Why does the liquid rise up through the dip tube when the valve is open