Students at Westfallia High School were curious about how wing shape affects glider flight. They decided to test four different designed wing shapes and measure glider flight distance. They figured wing style #3 would provide the best lift and stability. They used the same glider body on the same day with similar wind during each of the four trials. The four wing designs all had the same mass, just different shapes. All of the wing designs were variations of today’s standard design. Prediction:
Independent Variable:
Dependent Variable:
Controlled Variables:
Experimental Control?

To optimize wing design for next-generation flying micro-robots, we analyse ... Butterflies hold their wings in an orientation during gliding flight which may be very ... The tested wing shapes are illustrated in figure 3. ... The wing edge geometry can have a strong effect on the aerodynamic performance of a wing shape

Explanation:

the answer is barium and copper bromide

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.