Please help! do not send links for answers. thanks! 3. Wind energy forms 27% of the United States' renewable energy and has many advantages and disadvantages. Which of the following is NOT a disadvantage of wind energy?
A. It requires coal to be burned in order to make the wind turbines spin.
B. It produces large amounts of sound pollution when the wind turbines spin.
C. It only produces energy when the wind is blowing.
D. It requires many large turbines to produce enough energy.​

Define dew point. i am writing this part to be able to ask the question

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)