how can friction be reduced?Weegy:
You could use grease, oil, liquids with high viscosity depending on the type of surface to reduce friction. [wink]Auto answered|Score .6|kaysha|Points 4692|User:
why are seatbelts used in cars?
All cars are fitted with special catapults under the seats, so when idiots have a car crash they catapult into outer space. [ But it's only for buttfaces bare in mind. http://answers.yahoo.com/question/?qid=20110117035054AAy6R9H
] Auto answered|Score 1User:
why are seat belts used in cars?
Failure to wear a seat belt contributes to more fatalities than any other single traffic safety-related behavior. [ 63% of people killed in accidents are not wearing seat belts. Wearing a seat belt use is still the single most effective thing we can do to save lives and reduce injuries on America's roadways.
Data suggests that education alone is not doing the job with young people, especially males ages 16 to 25 the age group least likely to buckle up. They simply do not believe they will be injured or killed. Yet they are the nation's highest-risk drivers, with more drunk driving, more speeding, and more crashes. Neither education nor fear of injury or death is strong enough to motivate this tough-to-reach group.
Rather, it takes stronger seat belt laws and high visibility enforcement campaigns to get them to buckle up.
Seat belts are the most effective safety devices in vehicles today, estimated to save 9,500 lives each year. Yet only 68 percent of the motor vehicle occupants are buckled. In 1996, more than 60 percent of the occupants killed in fatal crashes were unrestrained.
If 90 percent of Americans buckle up, we will prevent more than 5,500 deaths and 132,000 injuries annually.
The cost of unbuckled drivers and passengers goes beyond those killed and the loss to their families. We all pay for those who don't buckle up in higher taxes, higher health care and higher insurance costs.
On average, inpatient hospital care costs for an unbelted crash victim are 50 percent higher than those for a belted crash victim. Society bears 85 percent of those costs, not the individuals involved. Every American pays about $580 a year toward the cost of crashes. If everyone buckled up, this figure would drop significantly.
] Auto answered|Score 1User:
is it possible to attain an efficiency of 100 percent in heat engines? Explain.Weegy:
No. It is second law of thermodynamics, from which we can understand why it is not possible? There are many ways of stating second law of [ thermodynamics. The heat engine formulation of second law of thermodynamics given by Lord Kelvin is " It is impossible to convert heat completely into work". Actually in any isolated system, a thermodynamic process occurs with an increase in entropy. The greater the entropy, the greater unavailability of energy of doing work. So you understand, it is not possible to attain 100% efficient engine. http://answers.yahoo.com/question/?qid=20110927011735AAUW5ee
] Auto answered|Score 1
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