One problem with the wax cylinders edison used was what ?

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves

Abike ride event is 30 miles. a first aid tent is put at the 3/4 mark of the course. how many miles from the starting point is the first aid tent?

Silver is a white metal that is an excellent conductor. silver tarnishes when exposed to air and light. the density of silver is 10.49 g/cm3. the melting point is 962oc and the boiling point is 2000oc. a chemical property of silver is