# HW1 - boland(kbb544 HW1 Mackie(10611 1 This print-out...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: boland (kbb544) HW1 Mackie (10611) 1 This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A piece of pipe has an outer radius of 4 . 6 cm, an inner radius of 2 . 7 cm, and length of 32 cm as shown in the figure. 3 2 c m 4 . 6 cm 2 . 7 cm b What is the mass of this pipe? Assume its density is 8 . 3 g / cm 3 . Correct answer: 11 . 5732 kg. Explanation: Let : r 1 = 4 . 6 cm , r 2 = 2 . 7 cm , = 32 cm , and = 8 . 3 g / cm 3 . V = r 2 1 - r 2 2 = ( r 2 1- r 2 2 ) , so the density is = m V m = V = ( r 2 1- r 2 2 ) = (8 . 3 g / cm 3 ) [(4 . 6 cm) 2- (2 . 7 cm) 2 ] (32 cm) 1 kg 1000 g = 11 . 5732 kg . 002 10.0 points Rain drops fall on a tile surface at a density of 4094 drops / ft 2 . There are 16 tiles / ft 2 . How many drops fall on each tile? Correct answer: 255 . 875 drops / tile. Explanation: Let : = 4094 drops / ft 2 and n = 16 tiles / ft 2 . Applying dimensional analysis, R = n = 4094 drops / ft 2 16 tiles / ft 2 = 255 . 875 drops / tile . 003 10.0 points A water holding tank measures 80 m long, 50 m wide, and 12 m deep. Traces of mercury have been found in the tank, with a concen- tration of 75 mg / L. What is the total mass of mercury in the tank? Correct answer: 3600 kg. Explanation: Let : = 80 m , w = 50 m , d = 12 m , and = 75 mg / L ....
View Full Document

{[ snackBarMessage ]}

### Page1 / 4

HW1 - boland(kbb544 HW1 Mackie(10611 1 This print-out...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online