Select all the correct answers. Copper is listed in the 29th position in the periodic table. It’s used for conducting electricity. What is copper?
a metal
a metalloid
a nonmetal
a noble gas
an element

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.