Owhich two elements will be the most alike and why? a. helium (he) and hydrogen (h) b. oxygen (o) and neon (ne) c. lithium (li) and sodium (na)

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

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.