Which investigation will best test the effects of gravity on moving objects? A.
pencils falling from the same height

B.
balloons floating upward from the same height

C.
a bicycle speeding up on a flat surface

D.
a ball slowing down on a flat surface

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

you gotta add the following molecules so we can give u an answer

explanation: