-Smokers lose about 7 - 10 years of life
-10 million with diseases caused or worsened by tobacco
• Heart disease, stroke, breast cancer, etc.
Lung Cancer
• More deaths than any other cancer, for both men and women; over 160,000 deaths/ year
• 90% of lung cancers in men caused by smoking; 70% in women
Other cancers:• Breast, esophagus, pancreas, kidney, bladder, etc
Heart disease
Stroke
High blood pressure
Chronic Obstructive Pulmonary Disease (COPD)
• Emphysema: destruction of air sacs in lungs, alveoli • Bronchitis: Inflammation of upper respiratory tract • Asthma: Narrowing of airways
Environmental Tobacco Smoke (ETS)
• "Second hand smoke" also includes 4,000 chemicals
• Causes, lung cancer, heart disease, asthma, etc.
• Particularly risky for young children: sudden infant death syndrome (SIDS), low birth
weight, bronchitis, pneumonia, asthma, ear infections
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computer science
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engineering
The mass flow rate, specific heat, and inlet temperature of the tube-side stream in a double-pipe, parallel-flow heat exchanger are $3200 \mathrm{~kg} / \mathrm{h}, 2.0 \mathrm{~kJ} / \mathrm{kg} \cdot \mathrm{K}$, and $120^{\circ} \mathrm{C}$, respectively. The mass flow rate, specific heat, and inlet temperature of the other stream are $2000 \mathrm{~kg} / \mathrm{h}, 4.2 \mathrm{~kJ} / \mathrm{kg} \cdot \mathrm{K}$, and $20^{\circ} \mathrm{C}$, respectively. The heat transfer area and overall heat transfer coefficient are $0.50 \mathrm{~m}^2$ and $2.0 \mathrm{~kW} / \mathrm{m}^2 \cdot \mathrm{K}$, respectively. Determine the outlet temperatures of both streams in steady operation using $(a)$ the LMTD method and $(b)$ the effectiveness-NTU method.
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