Hydrogen gas (h2) can be found in trace amounts in earth’s atmosphere. which of these statements describes a physical property of hydrogen? select one: a. hydrogen is found in acids. b. hydrogen gas is highly flammable. incorrect c. hydrogen reacts with oxygen to form water. d. hydrogen gas is less dense than oxygen gas.

Sound is a disturbance that travels through a medium as a

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.

Why does lightning travel from clouds to the ground?