a skateboard rolls horizontally off the top of a staircase and lands at the bottom of the stairs. the staircase has a horizontal length of 15.0 m and the jump last 1.15s. what's the skater's vertical velocity upon landing

This is how zirconium appears in the periodic table. rounded to the nearest whole number, how many electrons are in an atom of zirconium?

Gather reliable information to brent make his decision. to gather this information, use newspapers, call insurance companies or look at their web sites, and review consumer magazines and web sites. also, look at the manufacturer web site or for information about gas mileage. list the sources you use and take notes.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.