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Questions Asked on October 11, 2010

On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.02 m/s2. (a) What is the
1. 2 answers
2. asked by tls
3. 8,684 views
A car can decelerate at -3.40 m/s2 without skidding when coming to rest on a level road. What would be the magnitude of its
1. 2 answers
2. asked by Jason
3. 5,912 views
Typically, when a person coughs, he or she first inhales about 2.50 L of air at 1.00atm and 25 degreesC. The epiglottis and the
1. 6 answers
2. asked by Ellen
3. 4,938 views
Consider the following reaction: CH4 +2O2 -> CO2 + 2H2O. Delta H = -891 kJCalculate the enthalpy change for each of the
1. 1 answer
2. asked by Anonymous
3. 4,294 views
Washing soda is a hydrate of sodium carbonate. Its formula is Na2CO3 X xH20. A 2.714 g sample of washing soda is heated until a
1. 2 answers
2. asked by Doris
3. 4,076 views
How many grams of sucrose (C12H22O11)must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose
1. 1 answer
2. asked by May (PLEASE HELP)
3. 3,870 views
When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 5.3 m/s2 as it slows from 9.5
1. 1 answer
2. asked by leigha
3. 3,503 views
Michael Jordan, formerly of the Chicago Bulls basketball team, has some fanatic fans. They claim that he is able to jump and
1. 1 answer
2. asked by Kelly
3. 3,270 views
A sample of nitrogen has a volume of 50.0L at a pressure of 760mmHg. What is the volume of the gas at each of the following
1. 1 answer
2. asked by david
3. 2,521 views
12. All of the following words describe Sir Lancelot Du Lake excepta. loyal b. indirect c. strong d. clever B? 13. What is the
1. 1 answer
2. asked by mysterychicken
3. 2,501 views
URGENT!!You wish to prepare 1 L of a 0.02 M potassium iodate solution. You require that the final concentration be within 1% of
1. 2 answers
2. asked by Martin
3. 2,487 views
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What
1. 2 answers
2. asked by Ellen
3. 2,357 views
When 24.0g og glucose(a nonelectrolyte) are dissolved in 500g of water, the solution has a freezing point of -0.47C. What is the
1. 1 answer
2. asked by Jude
3. 2,345 views
what is the atomic number of an atom X which has 14 protons 14 electrons and 12 neutrons?2 14 12 26
1. 3 answers
2. asked by kaiya
3. 2,323 views
A sports car of mass 950 kg (including the driver) crosses the rounded top of a hill (r = 88 m) at 27 m/s.Determine the normal
1. 5 answers
2. asked by elizabeth
3. 2,288 views
A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calcu- late the mass of pure acetic acid in
1. 2 answers
2. asked by Eric
3. 2,278 views
What mass of MgSO4 · 7H2O is required to prepare 800 mL of a 0.442MMgSO4 solution?Answer in units of g. Would you use the
1. 2 answers
2. asked by Mike
3. 2,196 views
If a loaded truck that can accelerate at 1 m/s2 loses its load and has four-fifths of its original mass, what acceleration can
1. 1 answer
2. asked by Anonymous
3. 2,189 views
A sample of magnesium with a mass of 1.00 g is burned in oxygen to produce an oxide with a mass of 1.66 g. What is the empirical
1. 2 answers
2. asked by Doris
3. 2,151 views
A 0.80-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.7 m on a frictionless horizontal
1. 1 answer
2. asked by james
3. 2,070 views
Use bond energies to predict the molar enthalpy of combustion of acetylene gas.2C2H2 + 5O2--> 4CO2 + 2H2O I am confused as to
1. 1 answer
2. asked by ben
3. 2,066 views
What volume of 0.174 M Na3PO4 solution is necessary to completely react with 89.1 mL of 0.106 M CuCl2?
1. 2 answers
2. asked by Anonymous
3. 2,042 views
A solution contains an unknown amount of dissolved magnesium (Mg 2+). Addition of 5.50×10^−2 mol of Na2CO3 causes complete
1. 1 answer
2. asked by amanda
3. 2,005 views
There are 2 hats, 3 scarves, and 3 pairs of mittensHow many different combinations of 1 hat, 1 scarf, and 1 pair of mittens? How
1. 2 answers
2. asked by Amy
3. 1,881 views
If a hydrated salt is overheated and the anhydrous salt thermally decomposes, one product being a gas, how will it affect the
1. 1 answer
2. asked by Anonymous
3. 1,682 views
The battery in the circuit diagram has an EMF of 12V and an unknown internal resistance r. Voltmeter V1 is connected across the
1. 2 answers
2. asked by Jacqui
3. 1,675 views
a 50% aqueous solution of ethanol (50mL total) is distilled and collected in 10-mL fractions. Predict the boiling range of each
1. 2 answers
2. asked by Steph
3. 1,659 views
Data plotted on a graph results in a line that slopes upward from left to right. This graph tells you that a)when one variable
1. 2 answers
2. asked by Angelo
3. 1,643 views
The density of a solution of 3.69g KBr in 21.70g H2O is 1.11g/mL. What is the molarity of KBr in the solution.
1. 4 answers
2. asked by Jude
3. 1,638 views
Find dy/dx 4x^2+y^2-8x+4y+4=0, find points on graph of the equation where there is a vertical or horizontal tangent line
1. 1 answer
2. asked by tia
3. 1,526 views
In the simulation above the motion continues for 3 seconds. If the object travels a distance of 21.3 m in that time determine:(a
1. 1 answer
2. asked by Sam
3. 1,484 views
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What
1. 2 answers
2. asked by Ellen
3. 1,479 views
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving
1. 1 answer
2. asked by angela
3. 1,473 views
Describe a real life situation that could be modeled by a function.A real life situation is: A family decides that they want to
1. 2 answers
2. asked by Anonymous
3. 1,450 views
7. An unknown compound, C8H14, is optically active. Hydrogenation of the unknownyields 4-methylheptane. Ozonolysis of the
1. 2 answers
2. asked by josh
3. 1,441 views
Suppose that the radius r of a right circular cone of fixed height h = 20 cm is increasing at a rate 4 cm/s. How fast is the
1. 1 answer
2. asked by John
3. 1,414 views
A 1.42 g. sample of a pure compound, with formula M2SO4, was dissolved in water and treated with and excess of aqueous barium
1. 0 answers
2. asked by josh sears
3. 1,410 views
Alicia is 5ft tall. she casts a shadow that measures 6 1/2 feet long at the same time that a sculpture in the park casts a
1. 2 answers
2. asked by Tiffany
3. 1,394 views
Nathans Hot Dog Corp has projected the following sales for the coming year:Q1 Q2 Q3 Q4 Sales $ 700 $ 850 $ 950 $ 1,050 Sales in
1. 1 answer
2. asked by Trevor
3. 1,394 views
When 0.042 moles of aluminum sulfate aredissolved in enough water to make 763 milliliters of solution, what is the molarity of
1. 2 answers
2. asked by Mike
3. 1,282 views
A bullet with a mass of 0.01kg is fired horizontally into a block of wood hanging on a string. The bullet sticks in the wood and
1. 2 answers
2. asked by Amanda
3. 1,264 views
How many grams of sucrose (C12H22O11)must be dissolved in 200 g water to make a solution in which the mole fraction of sucrose
1. 1 answer
2. asked by Mike
3. 1,263 views
HCA/260.need help understanding malpractice suits
1. 2 answers
2. asked by cathy
3. 1,233 views
From the book the crucible:1.In what sense does the Corey's' situation reflect on John and Elizabeth Proctor? 2. How does the
1. 0 answers
2. asked by ......
3. 1,215 views
Given: Angle A and Angle C are complementary to Angle B.Conclusion: Angle is congruent to Angle C. Determine whether each
1. 2 answers
2. asked by Ron
3. 1,207 views
The force on a wire is a maximum of 7.33E-2 N when placed between the pole faces of a magnet. The current flows horizontally to
1. 1 answer
2. asked by VJC
3. 1,193 views
A person walks 3.0847x10^1 m East, then turns around and walks 8.677x10^0 m West. The total time to walk this distance was
1. 1 answer
2. asked by annonomus
3. 1,186 views
In the following sentence, what is the antecedent of the pronoun "it"?The class decided to submit their project to the science
1. 8 answers
2. asked by leyla
3. 1,180 views
A total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 141 g of water. The reaction caused the
1. 3 answers
2. asked by Karen
3. 1,177 views
Résumés must be free from typos because employers:A will not hire anyone who cannot type. B assume that someone who is
1. 3 answers
2. asked by Daniel
3. 1,176 views
A baker used 16 pounds of flour and 12 cups of sugar to make several batches of cookies. the baker used the same amount of flour
1. 5 answers
2. asked by Kristy
3. 1,172 views
what does detras mean in spanish?
1. 2 answers
2. asked by Anonymous
3. 1,159 views
A block is projected up a frictionless inclined plane with initial speed v0 = 1.92 m/s. The angle of incline is è = 12.2°. (a)
1. 0 answers
2. asked by jessy
3. 1,152 views
Name four factors that can affect the rate of a chemical reaction. How does the rate of a chemical reaction change in response
1. 1 answer
2. asked by Anonymous
3. 1,150 views
Post your 50 or more word response to the following in the assignment link:How can you determine if two lines are perpendicular?
1. 0 answers
2. asked by Anonymous
3. 1,140 views
1. How would you explain the similarity between Christian idea to share for the well being of the community and Rousseau’s
1. 2 answers
2. asked by Jazmyne
3. 1,121 views
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving
1. 1 answer
2. asked by Jen
3. 1,115 views
i need to know how to write five sentences in which you address how your writing has changed in the first four weeks of class.
1. 1 answer
2. asked by sarah
3. 1,115 views
Research the Goldman Sachs website. Using your research findings from the Library and the Internet, develop both an EFAS
1. 3 answers
2. asked by Mandy
3. 1,096 views
organic chemistry lab and why is water the first choice for recrystallization when all factors are equal?
1. 1 answer
2. asked by sharon
3. 1,094 views
as a hiker descends a hill, the work done by gravity on the hiker isa.) positive and depends on the path taken b.) negative and
1. 0 answers
2. asked by tina
3. 1,076 views
An electron with a speed of 1.1 × 107 m/s moves horizontally into a region where a constant vertical force of 3.6 × 10-16 N
1. 0 answers
2. asked by jessy
3. 1,076 views
Sally travels by car from one city to another. She drives for 30.0 min at 80 km/h, 12 min at 105 km/h, and 45 min at 40 km/h.
1. 1 answer
2. asked by Anonymous
3. 1,047 views
the Ksp for CaF2 is 3.9*10-11. assuming that calcium flouride dissociates completely upon dissolving and that there are no other
1. 1 answer
2. asked by anon
3. 1,042 views
Please help!!!!Solve each system graphically. Be sure to check your solution. If a system has an infinite number of solutions,
1. 2 answers
2. asked by Jordyn
3. 1,036 views
In a car engine, gasoline (represented by C8H18) does not burn completely, and some CO forms along with CO2 and H2O. If 5
1. 0 answers
2. asked by Daniel
3. 1,030 views
Which hero's story, King Arthur's or Sundiata's, has the more relevant message for young people today? Compose an essay that
1. 1 answer
2. asked by mysterychicken
3. 1,028 views
how does the battle between Beowulf and the dragon show the inequalities of the Anglo saxon class system?
1. 0 answers
2. asked by sue
3. 1,025 views
17. Do students at various universities differ in how sociable they are? Twenty-fivestudents were randomly selected from each of
1. 0 answers
2. asked by Anonymous
3. 1,007 views
carbon -12 and carbon -14 arethe exact same atom isotopes of the same atom completely different atoms the same except that
1. 1 answer
2. asked by kaiya
3. 1,005 views
A sample of 9.4 grams of NaOH is dissolved into 693 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then
1. 1 answer
2. asked by May
3. 1,004 views
Consider the combustion of propane:C3H8 + 5CO2 -> 3CO2 + 2H20. Delta H = -2221 kJ. What mass of propane must be burned to
1. 0 answers
2. asked by Anonymous
3. 997 views
how many protons does se-2 have32 34 36 2
1. 1 answer
2. asked by kaiya
3. 995 views
A 5.2 kg box is on a frictionless 36 degree slope and is connected via a mass less string over a mass less, frictionless pulley
1. 1 answer
2. asked by Taylor
3. 992 views
A 1-kg mass hangs by a string from a disk with radius 5.1 cm which has a rotational inertia of 5 × 10-5 kg•m2. After it falls
1. 2 answers
2. asked by sandhya
3. 990 views
A hypothetical planet has a radius 1.1 times that of Earth, but has the same mass. What is the acceleration due to gravity near
1. 1 answer
2. asked by sarah
3. 984 views
it's discrimination to mandate that police officers must conform to a certain height and weight.which fallacies is this?
1. 1 answer
2. asked by April
3. 982 views
What is the Na+ concentration of 2.85 M sodium sulfate?
1. 1 answer
2. asked by A
3. 978 views
consider the following balanced chemical reaction: 2 Col3+3 K2S-> Co2S3+6 Klassuming all that can react will react, how many
1. 1 answer
2. asked by kayla
3. 977 views
marcias house is approx. 10 miles east of the airport. a jet is flying directly over her house after taking off from the airport
1. 0 answers
2. asked by andy
3. 975 views
theoretical percent sulfate in AlK(SO4)2*H2O
1. 5 answers
2. asked by thomas richards
3. 960 views
What is the energy of green light with a wavelength of 5.50x10^-7m?
1. 2 answers
2. asked by riley
3. 956 views
What is the fundamental premise of the collision theory?My answer: The fundamental premise of the collision theory is that in
1. 2 answers
2. asked by Anonymous
3. 934 views
What mass of MgSO4 · 7H2O is required to prepare 800 mL of a 0.442MMgSO4 solution?Answer in units of g.
1. 2 answers
2. asked by Mike
3. 934 views
Hi, can u pls check the english i used in my assigment is correct? if not pls correct and tell me where is my weekness.T/C
1. 4 answers
2. asked by ssebby
3. 925 views
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving
1. 1 answer
2. asked by lauren
3. 924 views
the coordinates of triangle KLM areK(-2,-5), L(0,1), M(6,-2) What type of triangle is KLM? A) obtuse isosceles B) acute scalene
1. 1 answer
2. asked by Tiffany
3. 924 views
What was the lesson taught in "Abraham and Isaac"?Thanks -MC
1. 3 answers
2. asked by mysterychicken
3. 917 views
I read this in a write-up of an experiment using atomic clocks:To reveal these effects, required the use of highly accurate
1. 2 answers
2. asked by charlie
3. 912 views
Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with
1. 1 answer
2. asked by Michelle
3. 904 views
Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on
1. 2 answers
2. asked by ash
3. 889 views
Iron Man Products has projected the following sales for the coming year:Q1 Q2 Q3 Q4 Sales $ 700 $ 850 $ 950 $ 1,050 Calculate
1. 0 answers
2. asked by Alyson
3. 886 views
A baker used 16 pounds of flour and 12 cups of sugar to make several batches of cookies. the baker used the same amount of flour
1. 8 answers
2. asked by Kristy
3. 886 views
A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 20
1. 0 answers
2. asked by kim
3. 882 views
Why is it important to simplify radical expressions before adding or subtracting? How is adding radical expressions similar to
1. 1 answer
2. asked by Abigail
3. 882 views
Step 1 = 3 boxesStep 2 = 6 boxes Step 3 = 11 boxes Step 4 = 18 boxes How many boxes at step 50? Which one? 100, 102, 2500, 2502
1. 4 answers
2. asked by Amy
3. 878 views
A car traveling at 7.3 m/s accelerates 4.5 m/s2 to reach a speed of 11.0 m/s.How long does it take for this acceleration to
1. 0 answers
2. asked by leigha
3. 875 views
Assignment  Calculate the pH, pOH, [H+], and [OH] for each of the followingsolutions. Show all work. (10 Points) Solution
1. 1 answer
2. asked by Brian
3. 869 views
Two identical point charges are fixed to diagonally opposite corners of a square that is .5m on a side. Each charge is 3.0E-6 C.
1. 0 answers
2. asked by Bob
3. 868 views
Two crates, of mass m1 = 60 kg and m2 = 130 kg, are in contact and at rest on a horizontal surface (Fig. 4-54). A 620 N force is
1. 3 answers
2. asked by Syl
3. 844 views

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