Problems on Physics - 613 Words

Work out the following problems. Be sure to show your work in detail. See the hand out uploaded for examples of how the problems should be solved and presented.  1. A 55 gal. drum of organic solvent, full and sealed, weighs 400 lbs. The empty drum weights 40 lbs. What is the density of the solvent, in kg/L? What is its specific gravity? Density = p = mass/volume Mass of solvent = 400 lbs 40 lbs = 360 lbs = 360 lbs * (0.45359237 kg/lbs) = 163.29 kg 1 pound = 1 lbs = 0.45359237 kg (online conversion app) Volume of solvent = 55 gallons = 55 gallons * (3.78541178 liters/gallon) = 208.19 L Density = p = mass/volume = 163.29 kg / 208.19 L = 0.784 kg/L (spgr)solvent = p_solvent/p_water Specific gravity of water = p_water = 1000 kg/m^3 = 62 lb/ft^3 Volume of 55 gal drum = Pi*r^2*h where the drum has a 22.5 diameter and is 33.5 high. Thus v_solvent = pi*(11.25)^2*33.5 inches^3 = 13313 in^3 * (1 ft/12in)^3 = 7.7 ft^3 (spgr)solvent = m_solvent/(v_solvent*p_water) = 360 lbs / (7.7 ft^3 * 62 lb/ft^3) = 0.754 The density of the solvent is = 0.784 kg/L and the specific gravity is 0.754. 2. A cylindrical object 0.5m in diameter and 2m long weights has a mass of 200kg. The object is floating end-down in water. How many cm of the object are above the waterline? 0.5m ? cm = how much above waterline? 2m V_sub/V = p_cyl/p_water V_cyl = Pi*r^2*h = pi (0.25m)^2*2m = Pi/8 m^3 P_cyl = mass_cyl/V_cyl = 200kg / (Pi/8 m^3) = 1600/Pi kg/m^3 V_sub/V = p_cyl / p_water =Show MoreRelatedPhysics Problems1088 Words   |  5 PagesUNIFORMLY ACCELERATED MOTION Problem-Solving 1. A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car (assume uniform acceleration). 2. A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Determine the acceleration of the bike. 3. 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Private Security and Critical Infrastructure Assets Essay

The private security and law enforcement officer as well the FBI function and responsibilities have tightened after the 9/11 attacked. Private security officers are undergoing more advanced training from latest technology system to protect the nation to terrorism to be prepared and ready in any event that might come along the way like the 9/11 attacked. After the disastrous event of the 9/11 attack numerous companies and group of people obligate themselves a thorough investigation and evaluation. Security companies are more watchful and alert doing total criminal screening that includes background checks, financial check, criminal records and fingerprinting on potential employees and so total background checks on agency and essential plan†¦show more content†¦The private security and personnel should always anticipate faster action in dealing terrorism because they are the one that most well through and the quality and trait of private security organization is well concentr ated on the concern area of their task and operation. Not only this private security organization would assist and help charitable institution which needs safeguarding someone in any harm or from robbers and even any act of attacks and mostly helping to hand out relief goods in time of calamity. Not to forget that most of the private security organization would volunteer transportation, transmission, or interaction, gathering of secret information in regards to terrorism, act of teaching techniques in case of any terror events. In my own opinion I should that private security and public law enforcement should have join team work or full effort working together to combat terrorism. There is always big difference between the two groups but the main objective is to prevent any terrorist act to happen in order to protect the nation and its people. The public law enforcement and private security organization should expand and perform and efficient working relationship that will give policy and procedure on the training and sharing of initiatives and reliabilities. Each group should have the means of linking on computers in order to exchanges information for possible terrorism. 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Should Smoking Be Banned Free Essays

Cigarette smoking has been a trend since the beginning of the industrial revolution. Some people believe that smoking could help them release their stress as it helps them to relax. Some people also believe that the cigarettes business is necessary for a specific country to develop their country’s economy. We will write a custom essay sample on Should Smoking Be Banned or any similar topic only for you Order Now As time flew, knowledge develops and technology rises, and as a result, we came to know that cigarette smoking brings numerous potential harm not just to our body but also to the environment.But many people still practice smoking regardless the fact that smoking could potentially ruin their health as what is written on the cigarette box itself. Knowing all these, still some people continue on smoking, as if they did not know that they are harming their surroundings too, therefore cigarette smoking should be banned. I think only by doing so we can achieve a more positive result. Some of those who support smoking claim that it’s hard for smokers to break their habit. 2 out of 15 smokers failed to break the habit, therefore, if it’s banned then it could trigger the opening of the black markets of cigars, just like drugs, and it would be much more difficult for the government to control than when it’s legalized. However, by making them illegal, we could at least force them to quit smoking, and automatically more people would quit, 14 out of 15 people will try to quit knowing it illegal. And most importantly, by marking them illegal, it could decrease most of the passive smokers issue as if it’s illegal, then they will not be able to smoke in public areas.The supporters of cigarette smoking also maintain that smoking could release them from stress as it helps them to relax. So they think that they have the right to own the relaxing atmosphere and so. However, cigars are addictive, although it gives relaxation, it contains addictive substance called nicotine, just like drugs, addictive. Most drugs like heroines also gave relaxing and addictive effects, but they are banned, so smoking should be banned too, just to be fair. People could get relaxation as much as they want by sleeping, walking or playing games, that way it would be much healthier and much more environmentally friendly.The final argument advanced by the cigarette-smoking supporters is that the cigarette business is necessary for a specific country’s income, and are responsible for the economic growth of the country. However, smokers tend to develop smoking-related disease which is more likely a kind of respiratory disease which could result in death, if we use the number of death that is caused by cigarette smoking, we could surely raise the country’s income in a way such as labor intensive and thus increasing the growth of the economy of the country he althily, which is a much better way.It should now be clear that cigarettes smoking should be marked illegal, as smokers have more chance to develop respiratory disease, and are addictive, just like drugs, it could also effect the non-smokers by turning them to passive smokers. In conclusion, smoking could give numerous negative impacts, individually and socially, therefore it should be banned for good, just like drugs. How to cite Should Smoking Be Banned, Papers

Therapeutic Communities free essay sample

Drugs and Alcohol Therapeutic Communities In today’s world, people each and everyday from a wide range of teenagers to adults, abuse substances such as illegal drugs and alcohol. Not all of these people are open to admit that they indeed have a problem, and could really use professional help from others to stop their bad habits before they become a larger issue than it already is. Lucky for the people who are able to accept their problem at hand, places such as therapeutic communities are there for support to help these people overcome their drug or alcohol problem. A therapeutic community is a place where abusers don’t have to feel judged or ashamed by coming in for a radical positive change in his or her life. Depending on certain cases of the patient, and how serious the potential damage from the substance, the program can determine whether the patient has the option to stay for a long period of time that can be anywhere from a couple months to a year, or a shorter session. We will write a custom essay sample on Therapeutic Communities or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page What is a therapeutic community? In most cases at a therapeutic community you will see that in the residential areas the professional trained staff will be living with the client 24/7 to help monitor and keep everything under control. Therapeutic communities have and gained some reputation for success in rehabilitation and patient satisfaction in Britain and other countries outside the US. In Britain, democratic analytic therapeutic communities most usually specialize in the treatment of moderate to severe personality disorders and complex emotional and interpersonal problems. The evolution of therapeutic communities in the United States has followed a different path with hierarchically arranged communities specializing in the treatment of drug and alcohol dependence. The way TC’s operate are quite easy to understand, the client lives with a trained employee of the facility in an absolutely substance free environment, and if all goes as planned, the success rate of beating the habit is greater to happen then of having a relapse of the issue he or she is initially here for. The clients are not alone, there are other patients as well in these stabilized facilities and they are their to support each other, by having group sessions and constantly communicating with one another to help everyone get through and past their problem together. TCs differ from other treatment approaches principally in their use of the community, comprising treatment staff and those in recovery, as key agents of change. This approach is often referred to as community as method. (national institutes of health). The people who are usually admitted to a TC have a history of social functioning, an education/ vocational skills that have had family ties that have been completely ruined because of their substance abuse. It is hard for both the child and the parents when having to deal with a problem such as this. No parent ever wishes to have to send their child to programs like these, but only if it is necessary it should 100 percent be done for the best interest of the person endangering themselves as well as the parents. The ultimate goal for a Therapeutic community is to first eliminate the patient’s want for the substance, keep them occupied while staying sober. NIDA has conducted several large studies to advance scientific knowledge of the outcomes of drug abuse treatment as typically delivered in the United States. These studies collected baseline data from over 65,000 individuals admitted to publicly funded treatment agencies. Data were collected at admission, during treatment, and in a series of follow-ups that focused on outcomes that occurred 12 months and longer after treatment.