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Is it true with a Blood Alcohol Concentration of 0.08 the reaction time of the average driver doubles?
Wiki User
∙ 14y ago
A study by the Traffic Injury Research Foundation found that, at BAC levels of .05 to .08, the risk of collision for drivers in the 20+ age group was about twice that of drivers with zero BAC. For young novice drivers (16- to 19 years of age) the crash risk at .05 to .08 was about eight times that of normal drivers!
A 1994 research document released by the National Highway Traffic Safety Administration also identifies impairment problems at .02 and states that "virtually all drivers are substantially impaired at .08 BAC.
For an idea of how much it takes to reach .08: four beers on an empty stomach in one hour for a 170 lb. man; three for a 137 lb. woman.
Wiki User
∙ 14y ago
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Probability of rolling doubles with two dice?
The probability of rolling doubles with two dice is 1 in 6, or about 0.167.
What is the porbability that you do not roll doubles on a first toss but you do on the second toss?
The probability that when you toss a dye two times (or toss two dice) both times thedye shows the same number (or the two dice roll doubles) is calculated as follows.First dye toss roll any outcome (1, 2, 3, 4, 5 or 6). The probability the second tosscomes out the same as first toss is 1/6. So, for two dice to roll doubles:P(doubles) = 1/6Probability of complement event (not rolling doubles) is;P(not doubles) 5/6So the probability of first two dice trial 'not doubles' and following trial of the two dice'doubles is;P([N doubles]1 and [doubles]2) = 5/6 ∙ 1/6 = 5/36
What is the probability of rolling a sum of 8 and doubles when rolling two dice?
The probability of rolling a sum of 8 and doubles when rolling two dice is 1 in 36, or about 0.02778. Simply note that there are 36 permutations of two dice, of which exactly one of them (a 4 and a 4) matches the conditions specified.
There are 36 different outcomes possible when you toss two dice. What is the probability that the two dice will show the same number?
There are 6 different doubles that can be rolled. (They are 1 and 1, 2 and 2, etc.) You have a 6/36 chance of rolling doubles. The fraction 6/36 simplifies (reduces) to 1/6. Your 1 in 6 chance of rolling doubles now needs to be converted to probability. Probability speaks to the "chance" that something will occur. It is expressed as a "pure" number, and the range of probability is from 0 to 1. The probability 0 means that it cannot occur, and the probability 1 means that it will or must occur. Everything else falls in between. If you have a 1 in 6 chance of rolling doubles that translates into a 1 divided by 6 probability, or a 0.1666666... probability that a double will come up.
How many different permutations can be made with the letters in the following?
There are 12 letters in the following, with two pairs of doubles so the answer is 12!/[2!*2!] = 119,750,400
What would happen to the rate of a reaction with rate law kNO2H2 if the concentration of NO were doubled?
The rate would be four times larger
How is rate of a chemical reaction usually expressed?
Rates of reaction can be expressed depending upon their order.For example say you have a reaction between two chemicals and the initial rate for that reaction is known :-when:-The concentration of one of the reactants is doubled and the other reactants concentration remains the same and the overall rate of reaction does not change - reaction is zero orderwith respect to chemical which was doubled.The concentration of one of the reactants is doubled and other reactants concentration remains the same and the overall rate of reaction doubles - reaction is first order with respect to chemical which was doubled.The concentration of one of the reactants is doubled and other reactants concentration remains the same and the overall rate of reaction quadruples - reaction is second order with respect to chemical which was doubled.Zero Orderrate = kFirst Orderrate = k [A] (reaction is 1st order with respect to [A] and 1st order overall)Second Orderrate = k [A][B] (reaction is first order with respect to [A] and first order with respect to[B], reaction is second order overall)rate = k [A]2 (reaction is second order with respect to [A] and second order overall)Orders are simply added together in order to determine the overall order of reaction :-rate = k [A][B][C] would be third order overall and first order with respect to each of the reactantsThere are other orders of reaction, for example 2 and 3 quarter orders and third order reactions, but these are a little more complex.
Why is a chemical reaction rate doubled when the concentration of one reactant is doubled explain this in terms of collision theory?
Pretty simple, really. For any one "A" molecule, if there are twice as many of the other "B" molecule present then the odds of it colliding with one of them are twice as high. The same equations for effective collisions hold, so doubling the concentration doubles the reaction rate.
How would increasing the temperature affect the rate of a reaction?
Doubles it
How is the rate of a chemical reaction usually expressed?
Let assume a simple synthesis chemical reaction in solution (the solute is inert for the considered phenomenon). We can write A + B -> C and image to start with a concentration CA and CB of the components A and B and with no molecule of C. At the beginning A and B combine to form C at high speed, since no C is yet present. While the reaction goes on, C start to be present in a certain concentration CC and also the inverse reaction starts to happen, that is C decomposes in A+B. In an instant t, the rates of variation of the concentration of the three substances, that is the quantity of substance produced (or consumed if the rate is negative) in a very small time interval (let us call them RA, RB and RC) follows the so called chemical kinetics laws RA = ki CC - kd CA CB RB=RA RC=kd CA CB - ki CC where the parameters kd and ki are called direct and inverse reaction rates. Their values depends on the microscopic characteristics of the involved molecules, like collision section so on. This is a very simple situation in which the synthesis happens directly by uniting an A molecule with a B molecule. There are much more complicated reactions, where the reaction happens in a set of subsequent states and stoichiometric coefficients different from one are present. For example oxidation of carbon oxide to carbonn dioxide NO2 + CO -> NO + CO2 is a two step reaction, that happens as 1) NO2 + NO2 -> NO3 + NO 2) NO3 + CO -> NO2 + CO2 When a multiple step reaction is present, the rates can always be written, by their dependence from the concentration of the reaction elements is not linear, but depends on some power of the concentrations (that generally has no relation with the original reaction stoichiometry). Also in this case however, the coefficients of such nonlinear dependence are called reaction rates.
The average newborn doubles her birthweight in?
The average newborn doubles her birth weight in five or six months of life.
What rough relationship can be infer between temperature and rate of reaction?
reaction rate doubles with every 10 K temperature change
How does the reaction temperature affect the rate of a chemical reaction?
Changing temperatures has a dramatic affect on the rate of chemical reaction. As an example for every 10 degrees you raise the environment the reaction doubles (to a certain degree)
Why is it that the reaction times to impaired drivers often doubles in response to situations on the road?
Your response time to a situation is determined by your ability to recognize a situation and in reflexes, in short a cognitive response followed by a motoric response. Decreased visibility and lessened ability to retain concentration probably account for the increased response time of impaired drivers.
How does temperature affect the rate of a chemical change?
Changing temperatures has a dramatic affect on the rate of chemical reaction. As an example for every 10 degrees you raise the environment the reaction doubles (to a certain degree)
What are the physical methods for the determination of reaction rate?
There are two methods used primarily. In the first method, the same reaction is repeated several times, but each time a different concentration of the reactants is used and the initial reaction rate is measured each time. However, it must be done in a logical way for this method to work. The simplest way to do it is to start with one ratio of the reactants. Let's assume we have two reactants, A and B. So we'll start with a concentration of 1 for A and 1 for B. Measure the initial rate. Then we'll double the concentration of A to 2, but keep B the same. If the rate doubles, the order of reactant A is one, but if the rate quadruples, the order is 2. Then we do the same thing for B. Keep A the same, but double B. Again, does it double or quadruple the rate? If you have three reactants you have do do more combinations like this to isolate each variable. Just make sure you change only one thing at a time so you can figure out individual effects. If you change everything at once, it's a mess! The other way is to look at the reaction rate as a function of time. Here the reaction is only performed once, but the rate is monitored over time. Based on the predictions for different order reactions, the shape of the curve you plot when you graph the reaction rate versus time will be different for different order reactions. By the shape of the graph you plot, you can tell the reaction order in this way.
What size is the Average mobile home?
- In the park where I live the average seems to be 14 x 68 (952 sq. ft.) with 'doubles' at 28x48 (1344 sq. ft.)
