A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road is ...
April 17, 2011
Please Help!!! A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.5 m before stopping. The police officer, knowing that the coefficient of kinetic friction between ...
April 17, 2011
Suppose the roller coaster in Fig. 6-41 (h1 = 30 m, h2 = 11 m, h3 = 20) passes point 1 with a speed of 2.10 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point 2? The distance traveled is 50.0 m.
April 15, 2011
A child in a boat throws a 5.40 kg package out horizontally with a speed of 10.0 m/s, Fig. 7-31. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 40.0 kg.
April 14, 2011
Dr. Miller pulled a wooden crate at a constant accelerationof 1.23 meters per second per second with a forceof 752 newtons at an angle of 22 degrees above the horizontal. The coefficient of kinetic friction between the crate and the floor was 0.347. Find the mass of the crate.
March 20, 2011
As part of a training program, an athlete runs while holding 8.00 weights in each hand. As he runs, the weights swing through a 30.0 arc in . His hands are 72 from his shoulder joint, and they are light enough that we can neglect their weight compared with that of the 8.00 ...
February 6, 2011
Suppose that Maria has 140 coins consisting of pennies, nickels, and dimes. The number of nickels she has is 9 less than twice the number of pennies; the number of dimes she has is 19 less than three times the number of pennies. How many coins of each kind does she have?
January 17, 2011
The population of the Earth is approximately 6 billion people and is growing at an annual rate of 1.9%. Assuming a Malthusian growth model, find the world population in 44 years.
November 17, 2010
suppose you exert 150N on your refrigerator and push it across the kitchen floor at constant velocity. a. is the friction force equal and opposite to your 200N push? explain b. does the friction force make up the reaction force to your push?
November 6, 2010
Exactly 10mL of water at 25 degrees C was added to a hot iron skillet. all of the water was converted into steam at 100 degrees C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 L/mol*C, what was the temp change of the skillet?
October 26, 2010
Water flows into a swimming pool at a rate of 9.59 gal/min. If the pool dimensions are 30.9 ft wide, 47.6 ft long and 13 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches). Answer in units of minutes.
September 15, 2010
Please check this over and see of they are right...if they are not can you please tell the the right answer and explain how you got it. I think I am getting myself confused. Thank you. Write the neutralization reaction for each of the following. Balance the equations. a. HI(aq...
August 25, 2010
A balloon is filled to a volume of 1.0 102 mL at a temperature of 38.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?
June 11, 2010
Assume that the life expectancy of U.S. males is normally distributed with a mean of 80 years and a standard deviation of 4 years. What is the probability that a randomly selected male will live more than 85 years?
April 29, 2010
Argus company makes three products: A, B, and C. Each unit of A costs $4, each unit of B costs $2, and each unit of C costs $1 to produce. Argus must produce at least 20 As, 30 Bs, and 40 Cs combined. Minimize Argus's costs
April 20, 2010
If businesses believe consumption will increase six months from now, everything else held constant, and they begin to increase investment, what do you predict will happen to aggregate demand?
March 4, 2010
The markets required return on Gitche Gumee Oil Company stock is currently 13.8 percent. If the expected return on the market portfolio is 12.6 percent and the risk-free rate is 3.5 percent, what is the beta of Gitche Gumee stock?
December 12, 2009
Amanda she is not refusing the question because she does not understand it, or because she is just refusing. She is saying this answer is unfair and if she was that student she would refuse to answer the question because she believes is biased and kind of sounds like it is ...
September 24, 2009
Summarize the effects of one type of sexual dysfunction that can affect both men and women. What are some factors that may cause this type of dysfunction? What treatments may help individuals who experience this type of dysfunction
April 16, 2009
Ok, Well What I think this means is, something like this, but I am not sure: Jennifer would want to take over the counter medications to help reduce the headaches and the backaches. Also a over the counter medication to help the indigestion that has been occuring. Jennifer is ...
January 24, 2009
Jennifer is a 29-year-old administrative assistant married to Antonio, an Italian engineer, whom Jennifer met four years earlier while on a business trip for her marketing company. The couple now lives in Nebraska, where Antonio works for the county's transportation ...
January 24, 2009
Scanning Sonnet 73- That time of year thou mayst behold When yellow leaves, or none, or few do hang Upon those boughs which shake against the cold, Bare ruined choirs where late the sweet birds sang. Im horrible at scanning. But I would love to have some pointers to make an ...
September 28, 2008
WE have to lable characteristics of leaders. I have Adolph Hitler, Benito Musiline, and Fidel Castro. For all of them i have Intelligence, ethics, physical strength, military prowess, common sense, courage, power, confidence, and i need 4 more... can anyone think of four more ...
May 12, 2008
In Julius Caesar, what is there about Caesar that attracts such a strong following? First of all, be sure to carefully read the character analyses at this site: http://www.sparknotes.com/shakespeare/juliuscaesar/ Also, from history, we know that Caesar was an immensely ...
November 27, 2006
What is outliers? how do you solve this problem? please give me some answers. In statistics outliers are data points that very far from the mean. There are some rules of thumb for determining them, but I don't recall them right off hand and don't want to reach for the ...
September 6, 2006