Water is transported to a residential area at 1.5 m^3/s using a 1500 m long concrete pipe with diameter 70 cm and surface roughness of 3 mm. to save energy, the city proposes to coat the inside of the pipe with a 2 cm thick liner with surface roughness of 0.04 mm. doing so will reduce roughness but also reduce pipe cross-sectional area.
1. will the gains be worthwhile?
2. calculate the relative change (percent increase/decrease) in needed pumping power if the lining is installed.

answer:

the army does care about its soilders sir i think yout getting off on the wrong foot sir you need to respect our country were keeping the peole that want to d harm towards you out. so dont go saying we don't care cause we do

answer:

1: productivity. productivity is an important reason for developing it systems.

2: information. it systems are key to delivering the information and intelligence you need to improve innovation.

3: cost reduction.

4: collaboration.

5: customer service.