Tion 4 Hydrogen gas (Hz) can be found in trace amounts in Earth's atmosphere. Which of these
statements describes a physical property of hydrogen?
Choose the correct answer.
1 Hydrogen is found in acids.
2 Hydrogen gas is highly. flammable.
3 Hydrogen reacts with oxygen to form water.
4Hydrogen gas is less dense than oxygen gas.

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90