Questions Asked on
February 8, 2008

science thanks dr bob
last one thanks dr bob why are nuetrons easier to use for nuclear bombardment than alpha or beta particles
asked by sam 
science
The concentration unit used in Raoult's Law calculations is: a. mole fraction b. percent by weight c. molarity d. molality e. none of these I think the answer is A... is is corrent ?
asked by Kim 
Physical Science
I need help with the following question... Thank You One degree celsius indicates the same temperature change as... one degree fahrenheit one kevin 5/9 degree fahrenheit 9/5 kelvin
asked by Mandi 
help huge test friday science
I cant grasp half life  the study guide question is how is half life dating used by scientists  I have 2 lines to write an answer
asked by claire 
science
The concentration unit used in Raoult's Law calculations is: a. mole fraction b. percent by weight c. molarity d. molality e. none of these I think the answer is A... is is corrent ?
asked by Kim 
US History
Somehow this question is supposed to relate to the Supreme Court I think? I need ideas... "How did World War II help redefine the United States' image in the world?"
asked by Hannah 
science
223 RA arrow + 4 88 a 2 complete the following reaction
asked by claire 
science
223 RA arrow + 4 88 a 2 complete the following reaction
asked by claire 
Algerbra
Simplfy. with not grouping symbols. 6x^2+9x12 ___________ 2
asked by Erin. ( im confused) 
business
Operating leverage is the extent of which fixed cost are used in a firm's operations. Is there a risk of having both high operating leverage and high financial leverage?
asked by Jera 
Physics
What is the diameter of a 1.00 meter length of tungsten wire whose resistance is 0.32 ohm (electrical resistance)?
asked by Jenny 
Physics II
The heating element of an electric oven is designed to produce 3.3 kW of heat when connected to a 240V source. What must be resistance of the element?
asked by Jenny 
chemistry
what is the name for a solution that can dissolve no more solute ?
asked by Ann 
chem
What is the name for the solution that can dissovlce no more solutte? a.unsaturated b.saturated c.supatersaturated
asked by Anonymous 
algebra
Complete ordered pairs for y=4x+12 (_,0), (3/4,_), (0,_), (3/4,_)
asked by austin 
Logic
For each of the following enthymemes, identify the premise(s) and the conclusion, and fill in any missing premises or missing conclusions. If possible, fill in what is missing in such a way as to make the arguments valid. It is possible that nothing
asked by Travis 
To Kill a Mockingbird
How old is Boo Radley? I'm writing a creative essay about him and I'd like to include his age... Do you know? Thanks in advance
asked by anonymous 
algebra
The sum of the first n counting numbers 1 + 2 + 3 + 4 + 5 ... + n is given by S = n/2(1 + n). a) Find the sum of the numbers 14 to 40 inclusive Answer is 729. But i don't get why. Someone explain what the qestion means by "inclusive" please >
asked by Annie 
Algebra
Clark's Rule is commonly used to calculate the childresn's dosage of medication: Clark's Rule is: C=A x W/150 Use the rule to calulate thr problem C child's dose A= adult's dose W=weight of child in pounds How much would a child need to weigh to receive
asked by G 
Algebra
The Occupational Safety and health Administration (OSHA) estblished permissible sound exposures in the workplace. This is modeled by the equation: S=2.817H + 108.9 Use the formula for the problem: S=maximun permissible sound level in decibels H=number of
asked by G 
Economics
I am taking Microeconomics. I have the following question: The cost of producing stero systems has fallen over the past several decades. a) Use the supplyanddemand diagram to show the effects of falling production costs on the price and quantity of
asked by G 
Environmental Science
Where can I find the salinity of the soil in the Amazon Rainforest?
asked by Evan 
algebra math
The following pie chart represents the results of a survey about whether people in a certain town have cats or dogs as pets. Neither 6% Both 22% Cats only 28% Dogs only 44% If there is 300 people in the town, how many people have neither cats nor dogs?
asked by Cathy 
Psychology
Where was the Rorschach ink blot test created? I know it was created by a Swiss psychologist Hermann Rorschach but where?
asked by Jake 
algebra
The following graph shows the enrollment at a community college. 1997 6,000 1998 8,000 1999 10,000 2000 12,000 2001 14,000 what was the increase from 1997 to 2001?
asked by Cathy 
Psychology
When was the California Psychological Inventory created?
asked by Jake 
algebra
I don't know how to find the GCF if the variables are different. For example, 48a^3 and 16b^5.
asked by Darren 
science
View the succession of the ecosystem in the Succession animation. Is it primary or secondary succession? Explain your answer.
asked by mikalah 
Algebra
What Do You Call It When Someone Pays Back a Loan Quickly? I would Really Apreciate To Get The answer.
asked by Seam 
Probability
1)A coin is tossed 5 times. Find P(at most 4 tails.) A)3/16 B)13/16 C)1/32 D)31/32 I chose D 2)How many different arrangements of the letters of the word doodle are possible? A)180 B)720 C)15 D)90 I chose B For #35, use the following tepereatures from
asked by Jon 
Algebra
The Occupational Safety and health Administration (OSHA) estblished permissible sound exposures in the workplace. This is modeled by the equation: S=2.817H + 108.9 Use the formula for the problem: S=maximun permissible sound level in decibels H=number of
asked by G 
Algebra
Clark's Rule is commonly used to calculate the childresn's dosage of medication: Clark's Rule is: C=A x W/150 Use the rule to calulate thr problem C child's dose A= adult's dose W=weight of child in pounds How much would a child need to weigh to receive
asked by G 
SCIENCE PLEASE HELP
There are 3.29g of iodine 126 remaining in a smple originally containing 26.3 g of Iodine  126 the half life of Iodine  126 is 13 days. How old is the sample? At study hall test is after lunch and cant figure out htese 2 on my review packet
asked by sam 
Chemistry
Do I have this right? Which one of these is the solute and which one is the solvent in a solution composed of a.) 25.0 g. of silver in 5.0 g. of mercury, and b.) 3.0 g. of iodine (I2) in 100.0 mL of ethanol? a.) Mercury is the solute and silver is the
asked by Suzy 
Science HELP 2nd question
A sample originally contained 2.5 g of rubidium 87 now contains 1.25 g. The half life of rubidium  87 is 6 x 10 ( to the 10th) years. How old is the sample? Is this possible? why or why not?
asked by sam 
Chemistry
Did I do this correctly or do I need to try again? What is the mass percent of a solution when 18.6 g of table salt is added to 81.4 g of water? Mass Percent = mass of solute(g)x100 mass of solution (g) = 18.6 g x100 18.6 g + 81.4g = 18.6 g x 100 100g =
asked by Lori 
English
Can you explain what a conflict is for a book report.
asked by Ann 
World History
How is farming in Africa and the Pacific Islands similar?
asked by Alex 
Math
how would you factor 4xx^23/ x1...so that x1 would cancel out? could you explain step by step..plz
asked by Andrea 
Chem
In an experiment 16.81 +/ 0.02 grams of hydrogen peroxide chemically decomposes into the products water and oxygen gas. The measured mass of oxygen gas produced in the reaction is 8.854 +/ 0.003 grams. Report the mass of water produced to the correct
asked by CHEM HELP! 
Math
Write an equivalent FRACTION to 5/8 that has a denominator of 40
asked by Mike 
Math
A 16 ounce container of a solvent must be mixed with 48 ounces of water. What fraction of solvent is there in the total mixture (lowest terms)?
asked by Mike 
Math
If the rise of a roof is 8 feet and the run is 2 feet 8 inches, what is the pitch of the roof in lowest terms when written as a FRACTION?
asked by Mike 
Math
A printer has 15 rolls of newsprint in a warehouse. What fractional total will remain (in lowest terms) after 10 rolls are used?
asked by Mike 
Religion
What are the central beliefs of Islam and how are they reflected in the Five Pillars?
asked by Anonymous Chaney 
business
I am taking Microeconomics. I have the following question: The cost of producing stero systems has fallen over the past several decades. a) Use the supplyanddemand diagram to show the effects of falling production costs on the price and quantity of
asked by G 
Economics
I am taking Microeconomics. I have the following question: The cost of producing stero systems has fallen over the past several decades. a) Use the supplyanddemand diagram to show the effects of falling production costs on the price and quantity of
asked by G 
Math
The improper fraction 24/7 can be written as what mixed number? _______ (separate the whole number part from the fractional part with a space.... Write the answer like 4 5/6) is the answer 3 3/7
asked by Mike 
Math
On a ruler , where does 7/16 lie? Between..... 1/2 and 5/8 ****3/8 and 1/2 (is this the answer) 1/4 and 3/8 none of these
asked by Mike 
managerial economics
The Largo Publishing House uses 400 printers and 200 printing presses to produce books. A printer's wage rate is $20, and the price of a printing press is $5,000. The last printer added 20 books to total output, while the lat press added 1,00 books to
asked by jean 
Math
Write an equivalent FRACTION to 3/7 which has a numerator of 114.
asked by Mike 
Math
Is it possible to have a 15/16 inch pipe with an inside diameter of 31/32 inch? No
asked by Mike 
Chem
In an experiment 16.81 +/ 0.02 grams of hydrogen peroxide chemically decomposes into the products water and oxygen gas. The measured mass of oxygen gas produced in the reaction is 8.854 +/ 0.003 grams. Report the mass of water produced to the correct
asked by Chem Help!! 
managerial economics
The MorTex Company assembles garments entirely by hand even though a textile machine exists that can assemble garments faster than a human can. Workers cost $50 per day, and each additional laborer can produce 200 more units per day (i.e., marginal product
asked by jean 
Math
Write an equivalent FRACTION to 5/8 that has a denominator of 40 then reduce 25/40 = 5/8 or would the answer still be 25/40
asked by Mike 
Math
A 16 ounce container of a solvent must be mixed with 48 ounces of water. What fraction of solvent is there in the total mixture (lowest terms)? equals 16/64= 1/4
asked by Mike 
Chemistry
250mL volumetric flask, 125 mL of a 6.0 M hydrochloric acid was added. This was then diluted with more water to reach the 250mL mark. What is the molarity of the acid at this time? Initial: M1 = 6.0 M hydrochloric acid V1 = 125 mL = 0.125 L Diluted: M2 =
asked by Kally 
Probabilty/Statistics
1)A coin is tossed 5 times. Find P(at most 4 tails.) A)3/16 B)13/16 C)1/32 D)31/32 I chose D 2)How many different arrangements of the letters of the word doodle are possible? A)180 B)720 C)15 D)90 I chose B For #35, use the following tepereatures from
asked by Jon 
Physics
A 10,000N car comes to a bridge during a storm and finds the bridge washed out. The 650N driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 16.6 m above the river, while the opposite side is a mere
asked by Charlie 
Business Law
In March 1988, Daniel E. Beren, John M. Elliot, and Edward, F. Mannino formed Walnut Street Four, a general partnership, to purchase and renovate an office building in Harrisburg, Pennsylvania. They borrowed more than $200,000 from Hamilton Bank to
asked by Alicia 
Physics
A satellite is in orbit 2500km above the surface of Earth. What is the velocity of the satellite in m/s?
asked by Charles 
economics
A country's excess of quantity demand is a nation's imports or exports?
asked by Ll 
Physics
If you were to jump from an airplane at an altitude of 15000 ft. and fall toward the Earth at 100 mph how long would it take to reach the surface?
asked by Charles 
Physics
If you fell into a hole in the Earth how long would it take to reach the center of the earth if your velocity remained constant at 100mph?
asked by Charles 
Physics
Find the attracting force between 2 people sitting .08 meters apart. One person has a mass of 62kg and the other 80kg.
asked by Charles 
Physics
The average radius of the earth is 6.38*10^6m. Is the diameter just twice that or 12.8*10^6m. The circumference is 6.28(6.38*10^6)=40.1*10^6m
asked by Charles 
AP Physics
A uniform thin rod of length 0.3m and mass 3.5kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 3g bullet traveling in the horizontal plane of the rod is fired into one end of the rod. As viewed from
asked by Darlene 
AP Physics
A small solid marble of mass m and radius r will roll without slipping along the looptheloop track if it is released from rest somewhere on the straight section of the track. For the following answers use m for the mass, r for the radius of the marble, R
asked by Darlene 
AP Physics
Two particles, each of mass m and speed v, travel in opposite directions along parallel lines separated by a distance d. A)Find an expression for the magnitude L of the angular momentum of the twoparticle system around a point midway between the two
asked by Darlene 
biology
blank is characterized by complex food webs, many different species of organisms, and little or no succession
asked by tonya 
AP Physics
A 1050kg car has four 15kg wheels. When the car is moving, what fraction of the total kinetic energy of the car is due to the rotation of the wheels about their axles? Assume that the wheels have the same rotational inertia as uniform disks of the same
asked by Bernadette 
English
I'm doing a speech on Aussie Slang for English, but it has to be interesting, funny and keep peoples attention. I need help with incorporating jokes anf humour!
asked by Sam 
AP Physics
At time t=0, a 2kg particle has position vector r=(5.0m)i+(8.0m)j relative to the origin. Its velocity just then is given by v=(5.0t^2m/s)i. For the following answers, use t for the time. A) About the origin and for t>0, what is the particle's angular
asked by Bernadette 
Physical Science
Hello, I wanted to know if I came to the correct answer in the following problem... Thank You I used: I=LK(ToTf) LD=LI A silver bar 0.125 meter long is subjected to a temperature change from 200 degrees celsius to 100 degrees celsius. What will be the
asked by Mandi 
criminal justice
Differences between the four major communication styles. Benefits of using particular communication styles. The importance of the communication process in law enforcement."
asked by Ree 
Chemistry
use the table below to calculate ΔHo reaction: Standard Enthalpies of Formation, ΔH˚fٍ at 298 K Substance  Formula  ΔH˚ƒ(kj/mol) Acetylene C2H2(g) 226.7 Ammonia NH3(g) 46.19 Benzene C6H6(l) 49.04 Calcium Carbonate CaCO2(s) 1027.1 Calcium Oxide
asked by Sam 
Physical Science
Hello, Can some one tell me if I came to the correct answer... Thank You How much heat energy is required to raise the temperature of 5 kilograms of coal from 20 degrees celsius to 220 degrees celcius? my answer: 1,314,718 J
asked by Mandi 
chemistry
In a calorimetry experiment in the lab, you were able to record the following data: Mass of water in a calorimeter = 90.0 g Initial temperature of water in calorimeter = 22.0o C Mass of unknown metal = 45.0 g Initial temperature of hot metal = 100.0o C
asked by James 
Algebra 2
Operations with Complex Numbers Simplify. 1. sqrt(144) 2. sqrt(64x^4) 3. sqrt(13)*sqrt(26) 4. (2i)(6i)(4i) 5. i13 6. i38 7. (5 – 2i) + (4 + 4i) 8. (3 – 4i) – (1 – 4i) 9. (3 + 4i)(3 – 4i) 10. (6 – 2i)(1 + i) 11. (4i)/(3+i) 12. (10+i)/(4i)
asked by Brian 
PreAlgabra
Unfortunately for mariners, the total amount of wave energy in a storm doesnt depend on the first power of wind speed, but on the fourth power. The seas generated by forty knot wind arent twice as violent as those from a twenty knot wind, they are 17 times
asked by Mackenzie 
Algebra
1. Juanita has 180 feet of fencing that she intends to use to build a rectangular play area for her dog. She wants the play area to enclose at least 1800 square feet. What are the possible widths of the play area? 2. A bicycle maker sold 300 bicycles last
asked by Sarah 
Algebra2
Complete parts a – c for each quadratic function. a. Find the yintercept, the equation of the axis of symmetry and the xcoordinate of the vertex. b. Make a table of values that includes the vertex. c. Use this information to graph the function. 1. f(x)
asked by Mara 
science
Predict the sign of ( ∆H) in each of the following reactions: NH3 (g) + HCl (g) NH4Cl(s) ∆S = +, ∆G =  Fe (s) + Cu+2 (aq) Fe+2 (aq) + Cu(s) ∆S = +, ∆G =  Cl2 (g) + 2Na (s) 2NaCl (s) ∆S = +, ∆G = 
asked by Luke 
Algebra2
Simplify: 1.SquareRoot(144) 2.SquareRoot(64x^4) 3.SquareRoot(13)*SquareRoot(26) 4.(2i)(6i)(4i) 5. i^13 6. i3^8 7.(5 – 2i) + (4 + 4i) 8.(3 – 4i) – (1 – 4i) 9.(3 + 4i)(3 – 4i) 10.(6 – 2i)(1 + i) 11. (4i)/(3+i) 12. (10+i)/(4i) 13. (5 +
asked by Mara 
Physical Science
Hello, Can some one tell me if I came to the correct answer... Thank You For coal 0.314 How much heat energy is required to raise the temperature of 5 kilograms of coal from 20 degrees celsius to 220 degrees celcius? my answer: 1,314,718 J
asked by Mandi 
Algebra2
Complete parts a – c for each quadratic function: a. Find the yintercept, the equation of the axis of symmetry and the x coordinate of the vertex. b. Make a table of values that includes the vertex. c. Use this information to graph the function. 1.
asked by Mara 
Algebra
1. Juanita has 180 feet of fencing that she intends to use to build a rectangular play area for her dog. She wants the play area to enclose at least 1800 square feet. What are the possible widths of the play area? 2. A bicycle maker sold 300 bicycles last
asked by Sarah 
Physics
A uniform electric field of magnitude 75 n/c is created at an angle of 33 degree relative to the positive xaxis. a)Find the voltage between the points (0.5m,0)& (0,0). b)find the value of y such that the voltage between the points (0.3 m, y) and (0,0) has
asked by Kwang hu111 
Chemistry
Predict the sign of ( ∆H) in each of the following reactions: NH3 (g) + HCl (g) NH4Cl(s) ∆S = +, ∆G =  Fe (s) + Cu+2 (aq) Fe+2 (aq) + Cu(s) ∆S = +, ∆G =  Cl2 (g) + 2Na (s) 2NaCl (s) ∆S = +, ∆G = 
asked by Luke 
Physics
If you fell into a hole in the Earth how long would it take to reach the center of the earth if your velocity remained constant at 100mph?
asked by Charles 
Calculus
integral oo, oo [(2x)/(x^2+1)^2] dx (a) state why the integral is improper or involves improper integral *infinite limit of integration (b) determine whether the integral converges or diverges converges? (c) evaluate the integral if it converges I know
asked by Anonymous 
physics
An air filled parallel plate capacitor has plates of area 0.0406 m^2 and seperation of 2.5*10^6 m. a)What is the capacitence for the setup? b)Our capacitor is connected to a 550 v battery, how much energy is stored in the capacitor? c) If 1 mJ of work is
asked by Kwang hu111 
Biology Nervous System
1. Explain why the kneejerk and Achilles reflexes are important in walking.
asked by Dick Rogers 
Biology Nervous System
A person touches a stove, withdraws his or her hand, and then yells. Why does the yelling occur after the hand is withdrawn? Does the person become aware of pain before the hand is withdrawn?
asked by Dick Rogers 
Biology Nervous System
While examining the victim of a serious car accident, a physician lightly pokes the patient's leg with a needle. The pokes begin near the ankle and gradually progress toward the knee. Why is the physician poking the patient? Why begin near the foot?
asked by Dick Rogers 
language
what would be a simplified reason to tell grade ones why there is valentines day? What does it mean? why do people receive cards?
asked by neil 
microbiology
What would happen if I omitted adding Gram's Iodine in the Gram Stain procedure?
asked by Anna 
chemistry Ap
How much heat must be added to 50.0g of aluminum metal at 25 degrees C to raise its temperature to 125 degrees C? I have about 20 of these left so if you can do this and work it out and show me how you did it it would be great so I can use it as a guide
asked by mhaidar9108 
science fair
I need to find websites about sience fair projectes about plants.
asked by desteny 
algebra
The sum of the swuares of the first n counting numbers: 1² + 2² + 3² + 4² + 5² + 6² + ... +n² is given by the formula S = n(n+1)(2n+1)  6 Find the sum of the squares of all the counting numbers between 15 and 35.  answer is 12445; how
asked by jadacess 
Calculus
evaluate the integral or state that it diverges. Check if I did it correctly. integral 0,1 dr/r^.999 lim b>0+ integral b, 1 1000r^.001 =1000
asked by Anonymous