In Trial 9, the electrical force exerted by Sphere Y on Sphere X and the electrical force exerted by Sphere X on Sphere Y were exerted in which direction(s)?

A.east； east

B.east； west

C.west； west

D.west； east

Tomas plans to construct a circular fishpond with a diameter of 9 ft. Which of the following is closest to the length, in feet, of the decorative fencing that Tomas needs to enclose the fishpond along its perimeter?

A.15

B.19

C.29

D.64

E.255

According to Figure 3, clasts and matrix particles having diameters greater than or equal to 0.5 mm made up approximately what percent of the total mass of the combined samples?

A.13%

B.33%

C.63%

D.83%

One of the cornfields involved in the studies had an area of 2.5 hectares. In Study 2, how many kg N was added to that field as fertilizer N ?

A.60 kg N

B.100 kg N

C.240 kg N

D.300 kg N

Christopher bought 4 cans of soup for a total of $3.36,which included sales tax of $0.16. At the same per-can cost, what is the cost before the sales tax is added for 6 cans of the same soup?

A.$0.80

B.$0.84

C.$4.80

D.$5.04

E.$6.40

In cold, damp weather, the buildup of ice on airplane wings can pose significant aerodynamic problems. Which of the following effects would you expect?

A.As ice builds up on the top of the wing, drag increases.

B.As ice builds up on the top of the wing, lift increases.

C.As ice builds up on bottom of the wing, lift decreases.

D.All of the above

If Trial 4 had been extended, at approximately what time would 0.45 mL of 0 2 have reacted?

A.70 sec

B.140 sec

C.240 sec

D.270 sec

A passenger plane is able to carry a fixed weight, including passengers and fuel.Which wing design would be best for such a plane?

A.Design 1

B.Design 2

C.Design 3

D.Design 4

Based on the description of a lahar deposit, how do clasts and matrix particles differ in size?

A.Any clast is larger than the largest matrix particle.

B.Any clast is smaller than the smallest matrix particle.

C.Some, but not all, clasts are smaller than the largest matrix particle.

D.Some, but not all, matrix particles are larger than the smallest clast.