Chapter 6.7

• a

• b

• c

• d

• a

• b

• c

• d

• a

• b

• c

• d

• P=130.68 W

• P=−130.68 W

• P=131 W

• P=−131 W

• R=1.31 Ω

• R=7.89 Ω

• R=8.29 Ω

• R=6.89 Ω

Given the formula: v=lwh. v=16,250 ft³, l=24.0 ft and h=22.0 ft. Find w. Round your answer to 3 significant digits.

• w=−30.77 ft

• w=−30.8 ft

• w=30.77 ft

• w=30.8 ft

Find b. Given the formula A=1/2h(a+b), A=1160, h=22.0, a=56.5. (Rounded to 3 significant digits).

• b=2A/h−a=49.0

• b=2A/h+a=47.6

• b=−2A/h−a=−49.0

• b=2A/h−a=46.3

The volume of a box is given by V=lwh. Find the length l, if the volume V=1,260 ft³, h=42.0 ft, w=13.0 ft. Round your answer to 3 significant digits.

• l=34.0 ft

• l=2.31 ft

• l=71.5 ft

• l=65.7 ft

Given the formula E=mv²/2, E=34,000, v=27.0. Find m. Round your answer to 3 significant digits.

• m=Ev²/2=4,500

• m=2E/v²=0.0678

• m=2Ev²=3,267

• m=2E/v²=93.3

Given the formula. E = mv^2, E=34,000, v=27.0, Find m. ‘Round your answer to 3 significant digits’.

• m = E v^2 / 2 = 4,500

• m = 2E / v^2 = 0.0678

• m = 2Ev^2 = 3,267

• m = 2E / v^2 = 93.3