determine the force in member be of the loaded truss. the force is positive if in tension, negative if in compression.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray