Match these items. 1 . full moon a visible half-circle 2 . first-quarter moon darkest phase of the moon 3 . 13 degrees when the the Earth is between the sun and the moon 4 . 29 1/2 days this is a measurement of how far the moon advances each day in orbit 5 . new moon the time the Earth must rotate to return to same position relative to the moon

What is the frequency of a light wave with a wavelength of 620nm

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's