Questions Asked on
December 8, 2010

College Chemistry
Which solution would have the lowest freezing point, 0.500 M NaCl or 0.500 M CaCl2?
asked by Sa ndra 
College Chemistry
A 50.0 mL sample of 6.0 M HCL is dulited to 200.0 mL. What is the new concentration of the acid?
asked by Sa ndra 
Math
Losing your bags during airline travel is not all that uncommon. Recently, an airline was sited for losing customers' baggage 8% of the time. A test is conducted by randomly selecting 14 customers for that airline and observing whether they had lost their
asked by Courtney 
Physics
A 10N meterstick is suspended by two sping scales, one at the .08 m mark and the other at the .9 m mark. If a weight of 5N is hung at the .2 m mark and a weight of 17N is hung at the .55 m mark, what will be the reading on each scale? I have:
asked by Jennifer 
Physics
Two straight and parallel wires of length 1.0 m carry a current  the first carries a currecnt of 9.0 A while the other wire carries a current of 4.0 A. What distance must separate the two straight and parallel copper wires if the force between them is to
asked by Jim 
math214
x/2+y/3=1 4y3x=2
asked by Anonymous 
MATH
What is the index of a radical? When working with radicals, can the radicand be negative when the index is odd? Can it be negative when the index is even? Why is it important to simplify radical expressions before adding or subtracting? How is adding
asked by Anonymous 
MATH/FINANCE
If DOL is defined as DOL=Percentage change in OCF/Percentage Change in Q please derive equation: DOL=1+FC/OCF? I need this by tomorrow...please help.
asked by Anonymous 
FINANCE/MATH
Please use both M&M proposition II with taxes equation and WACC equation to derive the following equation:? WACC = Ru X [1 Tc(D/V)]? I need this by tomorrow please help.
asked by Anonymous 
Physics
A ladder of mass M and length 2 m rests against a frictionless wall at an angle of 47 degrees to the horizontal. The coefficient of static friction between the ladder and the floor is 0.5. What is the maximum distance along the ladder a person of mass 13M
asked by applebottom 
Physics
A uniform meter stick of mass 40 g is used to suspend three objects as follows: 20 g at 0.13 m, 25 g at 0.41 m and 40 g at 0.64 m. Where could you place your finger to balance the stick in the horizontal position?
asked by applebottom 
Math Finite
How many years will it take for $12,000 to grow to $15,000 at 5.75% compounded monthly?
asked by Ericka 
Chemistry (URGENT)
What property of paradichlorobenzene may convince you that it is an ingredient in mothballs? Please help. I have no idea. I did search up mothballs and (PDB) is an ingredient but I don't know what property of PDB convinces that it's an ingredient. Any help
asked by John 
childhood obesity
what are some question you can ask to a child that is overweight?
asked by kate 
Basic Electronics
discuss your thoughts on the use of thevenin equivalent circuit.
asked by Dan 
chemistry........help!! =)
One brand of laundry bleach is an aqueous solution containing 4.00% sodium hypochlorite (NaOCl) by mass What is the molarity of this solution? (Assume a density of 1.02 g/mL .)
asked by Lisa, Help needed! 
Algebra
I am stuck... find the real solutions of the equation x to the 4th power minus 20x squared plus 64 equals 0
asked by Kyle 
Please help Math
If the corressponding angles of 2 polygons are congruent and the lengths of the corresponding sides of the polygons are proportional the polygons are.. a. Regular b. Congruent c. Symmetrix d. Similar
asked by Please help 
Find the maximum value of this function
f(x) = 9 sqrt(x)e*(x)
asked by Mike 
italian
A )Completare le farsi con il pronome personale opportune e con le desinenze del participio passato. 1ALESSIA HA VINTO IL PRIMO PREMIO? ____GLI________ TELEFONO SUBITO E ____GLI _____DICO , SARA FELICISSIMA. 2 DEI COMPAGNI DI CLASSE HO RIVIST_O__SOLTANTO
asked by julia 
italian language
A )Completare le farsi con il pronome personale opportune e con le desinenze del participio passato. 1ALESSIA HA VINTO IL PRIMO PREMIO? ____GLI________ TELEFONO SUBITO E ____GLI _____DICO , SARA FELICISSIMA. 2 DEI COMPAGNI DI CLASSE HO RIVIST_O__SOLTANTO
asked by julia 
geometry
________________________________________ ( 4.) Given u= i+3j2k and v=4i2j4k Find u.v
asked by banjo 
social studies
In what ways did Europeans' desire for trade with Asia affect the western hemisphere?
asked by andrea 
chem
1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and
asked by Anonymous 
Statistic
The number of customers who enter a supermarket each hour is normally distributed with a mean of 600 and a standard deviation of 200. The supermarket is open 16 hours per day. what is the probability that the total number of customers who enter the
asked by Tony 
math
To figure out the cost to ship a package, George has a chart with pounds and ounces. Kai wanted to ship a 90 ounce package. For how many pounds must George charge Kai?
asked by Claudette 
math,probability
Find the generating functions of a)p{x
asked by Joan 
physics
A stock room worker pushes a box with mass 11.2 kg on a horizontal surface with a constant speed of 4.50 m/s. The coefficient of kinetic friction between the box and the surface is 0.25. a) What horizontal force must be applied by the worker to maintain
asked by Yosh 
Math
A projectile is fired straight up from a cliff which is 200 feet above ground with an initial velocity of 220 ft/sec. Assume that the only force affecting the projectile during flight is from gravity which produces a downward acceleration 32 ft/sec^2. Find
asked by Marina 
Physics
A projectile is fired straight up from a cliff which is 200 feet above ground with an initial velocity of 220 ft/sec. Assume that the only force affecting the projectile during flight is from gravity which produces a downward acceleration 32 ft/sec^2. Find
asked by Marina 
math
what is the divisible of 215 and 48
asked by alexis joan 
chemistryURGENT!!
A sample of ammonina gas at 65.5 degrees celsius and 524 torr has avolume of 15.31 L. What is it's volume at 15.8 degrees celsius and its pressure is 524 torr?
asked by lavonne 
ChemistryPLease help!
What is the density of CO2 gas at 25.2 degrees celsius and 98.0kPa?
asked by lavonne 
Honors Biology  URGENT!!!
Remember that the greater the concentration of hydrogen ions, the lower the pH of a solution. How do you suppose the pH of the solution in the thylakoid space compares with the pH of the solution in the stroma? What is responsible for the difference?
asked by Brenda 
Honors Biology  URGENT!!!
ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.
asked by Brenda 
Honors Biology  URGENT!!!
After a biochemical analysis of the victim's tissues, brilliant biologist/criminal investigator J. C. Mickleberry announced his findings: "Contrary to the conclusions of the police, the victim did not suffocate. The electron carriers in his mitochondria
asked by Brenda 
Honors Biology  URGENT!!!
Without oxygen, cellular respiration grinds to a standstill, although glycolysis can continue to make some ATP anaerobically for a short time. When oxygen runs out, why does electron transport stop? Why do you thing the Krebs cycle stops?
asked by Brenda 
Honors Biology  URGENT!!!
In an experiment, plants were grown under colored filters that allowed equal amounts of light of different colors to strike different plants. Under which filter do you think plants grew the slowest? Why?
asked by Brenda 
geometry
If the bases of an isosceles trapezoid have lengths of 16 and 28, what is the length of the median? If necessary, round your answer to two decimal places.
asked by Anonymous 
biology
What regulary hit the earth for the first 600 million years of existence? What do scientists call this period of time?  Aseroids, and meteors hit the earth.What do scientists called this period of time ? I need help answer this question please. If the
asked by joy 
Math
Find all the vectors that are perpendicular to (1,4,4,1) and (2,9,8,2).
asked by Drake 
Math
At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product
asked by Rena 
Math
How do we know the ith of an invertible matrix B is orthogonal to the jth column of B^1 , if i is not equal/unequal to j?
asked by Nolan 
college chemistry
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
asked by jane 
college chemistry
At a prominent state hospital, a 45yearold woman is receiving a ‘combined modality' treatment for the initial stage of breast cancer. State the two aspects included in this treatment. State the methods by which a radiation oncologist can administer
asked by jane 
math
what is 4 times 3
asked by lolo 
math
if bill has 11 fiends for pizza each person gets 1/4 a pizza how many pizzas should he order
asked by Anonymous 
Bio
As a scientist, you are assigned the task of finding out if the disappearance of a particular fish species from a lake in the Northwestern United States is due to acid rain resulting from industrial air pollution. Identify alternative hypotheses that could
asked by Anonymous 
math
a right 90 degrees triangle/ label L,J and K. JK is 7 and angle L is 31.6.solve the given right triangle
asked by bell 
math
Find the volume of the solid enclosed by the paraboloids z = 4*( x^{2} + y^{2} ) and z = 8  4*( x^{2} + y^{2} ).
asked by tony 
plato
A colony of a country that followed mercantilism during the 17th century would NOT be encouraged to develop whay
asked by sarah 
Physics
What is the volume of 3.25 moles of a gas at a temperature of 115 K and a pressure of 275 kPa?
asked by Hannah 
Chemistry
If all of the energy from a 60watt bulb was put into 1 gram of water at room temperature for 2 seconds, how much would the temperature of the water increase?
asked by Karmelo 
Earth's Heat Resources
list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.
asked by Sydney 
Earth's Heat Resources
How is the energy that reaches earth's surface returned to space? is is by radiation?
asked by Sydney 
Earth's Heat Resources
most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really don't get this question.
asked by Sydney 
HEAT
A container holds a quantity of liquid nitrogen at a temperature of 200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a
asked by Sydney 
using the geometricprograming method of constrain
the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air. heating cost=0,002Q(delta T) and blower operating cost Blower cost=2.6^(10^9)Q^3 where Q= air quantity deliverd through the bed
asked by Alicia 
7th grade
a rectangular block measures 2cm * 1.5cm *1cm .the mass of the object is 31.5 grams .what is its density ?
asked by Anonymous 
criminal justice
what hiring standards are affected for different departments inmerged cell?
asked by tiara 
science
a shopper walks west 35m west, another 17m west and then 67m east. what is the resultant displacement?
asked by julie 
science
a shopper walks west 35m west, another 17m west and then 67m east. what is the resultant displacement?
asked by julie 
Math
a ladder reaches 18 feet up the side of a building with its base 5 feet from the building. Find the slope of the ladder.
asked by Jeanette 
Math
If S is the subspace of R^3 containing only the zero vector, what is S perp ? If S is spanned by ( 1 , 1, 1), what is S perp? If S is spanned by ( 2, 0, 0) and ( 0, 0, 3), what is S perp?
asked by Frazer 
College Chemistry..Urgent!
THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)
asked by shanice 
statistics
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. Out of 50 pregnancies, how many would you expect to last less than 250 days?
asked by Terry 
Chemistry
What is the pH of a solution if two aspirin each containing 500mg of acetylsalicyclic acid were dissolved in 325 ml of water?
asked by Clarissa 
physics
ladder of mass m and length l leans against a frictionless wall at an angle of 60 degrees. The coefficient of static friction between the ladder and ground is 0.45. A man whose mass is 4 times the ladder climbs up. How far up the ladder can he go before he
asked by katie 
physics
Battery supplies a potential difference of 6v At a certain temperature the current in the 45ohms resistor is 0.08A How would you calculate the potential difference across the thermistor? thanks :)
asked by peter 
Chemistry
Coprecipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the coprecipitates which are more soluble that the
asked by Patrick 
Chemistry
Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide
asked by Josh 
IPC
Suppose all of the apples have a mass of 0.10 kg. If apple (A) is sitting on the ground, what is its potential energy? A) 0.10 J B) 9.8 J C) 0.0 J D) 1.0 J Would it be A?
asked by Jon 
Math
show that the length of Ax equals the length of A^T x if AA^T=A^T A
asked by Melvin 
Physics
a jetliner traveling northward is landing with a speed of 80 m/s. Once the jet touches down, it has 800 m of runway in which to reduce its speed to 10 m/s. (a) Compute the average acceleration (magnitude and direction) of the plane during landing (take the
asked by Geri 
English
I really need someone to have a look at these sentences. Thank you very, very much. 1)Up to the late eighteenth century the Church had been in charge of most (of) the educational facilities existing in England. 2) In the nineteenth century it contributed
asked by Franco 
physics
31. (II) a shotputter throws the shot with an initial speed of 15.5m/s at a 34.0* angle to the horizontal. Calculate the horizontal distance traveled by the shots if it leaves the athlete’s hand at a height of 2.20m above the ground.
asked by Anonymous 
Math
A basketball team has a season record of five wins and two losses. If the team continues this kind of performance, how many wins can it expect if it ends the season with six losses?
asked by Jenea 
English
I forgot to include the following sentences. Thank you. 1)I need to rephrase this: “These schools incorporated the newfound ideals of manliness; of physical, sporting endeavour, of valuing team above self, of learning to play the game and without
asked by Franco 
Chemistry
Hi,can I have your help? I'm just trying to solve a few Dilution Solution problems. I'm stuck on these two,and I wish you could help. Here's one: A 500 mL bottle of concentrated acetic acid is diluted to make a 5.0% solution. Find the volume of diluted
asked by Cliff 
POETRY, PART 2
Hopkins's use of "seared," "bleared," and "smeared" is an example of
asked by Anonymous 
Chemistry
Hydrochloric acid reacts with Magnesium to form Magnesium Chloride and Hydrogen gas. deltaH= 442kJ If 15mL of 1.0M HCl reacts with .3g of Mg, how many L of H2 are produced? How much heat is produced?
asked by Taylor 
Spanish
16. ¿Pagaste sólo cinco dólares por la sudadera? a. !Qué caro! b. !Qué verde! c. !Qué ganga! d. !Qué grande! C 17. Prefiero esta blusa y ______ camisas. a. esa b. esas c. esto d. esta A? 18. "____, ¿cuánto cuestan estos tenis?" "Treinta pesos." a.
asked by mysterychicken 
calculus
Find the area of the region under the graph of the function f on the interval [1, 2]. f(x) = 6x + 1
asked by Anonymous 
MATH
CAN SOMEONE HELP ME FIND THE GCF OF THIS POLYNOMIAL? 6x^4+18x^2=
asked by MARIE 
Math
If one apple and two pears cost $1.55 and two apples and two pears cost $2.30, how much does one apple cost?
asked by Prince 
physics
A ship approaches saturn at 10.4km/s and saturns speed is 9.6km/s (relative to the sun). Take the interaction as elastic collision. Saturns mass is greater than the space ship. Find the speed of the ship after it goes around Saturn.
asked by katie 
health
Which is a condition of the male sex gland surrounding the urethra just under the urinary bladder? A. Cryptorchidism B. Hypogonadism C. benign prostatic hyperplasia D. Bulbourethristis I think it is B but not 100% sure or it may be D Help please need
asked by bett 
chemestry
given 43 moles of KCl how much HNO3 is needed to complet the reaction
asked by juan 
integration
Find the area of the region under the graph of the function f on the interval [1, 2]. f(x) = 6x + 1 bound by the x axis
asked by peter 
algebra
A. 3x + y = 8 xy =6 B. x 1/2y =2 y=2x4 C. x + 2y = 9 2y = x + 13 I am not grasping the substitution method! Please help me.
asked by Julie Jam 
physics
why is the current the same in the resistor and the thermistor in a series circuit? thanks :)
asked by peter 
Math
The price of admission for a concert was $9 for adults and $4 for children. Altogether, 1770 tickets were sold, and the resulting revenue was $14,680. How many adults and how many children attended the concert?
asked by Julie Jam 
physics
why does the voltage across the thermistor and resistor add up to the voltage of the battery? thanks :)
asked by peter 
Chemistry
My teacher uses the online homework ARIS and the question is write the balanced equation of Mn3(PO4)2: i have enter the answer Mn3(PO4)2 (s) =3Mn^2+(aq) + 2(PO4)^3(aq)
asked by Taylor 
geometyr
determine the perimeter of triangle KLM, if triangle KLMtriangle FGH, FG=30, GH=38, FH=38 and KL=24
asked by stephanie 
algebra
College Algebra Directions: Solve graphically: x^(2/3)+x^(1/3)2=0 I just don't know how to approach this?!
asked by Courtney 
Chemistry
Solid Nal is slowly added to a solution that is .0040 M in Cu^+. Calculate the [I] when CuI just begins to precipitate from the solution.
asked by Taylor 
CHemistry
What is the [OH] of a saturated solution of Zn(OH)2? Ksp=1.8 x 10^14. i'm just confused on how to start this problem i don't want the answer just the steps how to get there please
asked by Taylor 
geomety
solve for x 5 + x 10  =  x 8
asked by stephanie 
social studies
what is a veteran?
asked by jess 
Chem
Please tell me if these are right! What are the [H3O+] and [OH] for a solution with the following pH values? a. 10.0 I got 1.0*10^10 for [H3O+] and 1.0*10^4 for [OH] b. 5.0 I got 1.0*10^5 for [H3O+] and 1.0*10^9 for [OH] c. 7.00 I got 1.0*10^7 for
asked by Jessica 
Chemistry
Identify an inert element that is used in electrical discharge tubes.
asked by Paige 
social studies
show me a pie chart with the population and land ownership of france in 1789
asked by courtney 
English
Rewrite the following fragments to make a complete sentence. 1. Have you seen the new movie about the Titanic? 2. If the powder turns red 3. before the sun rises
asked by pinki 
Physics
Ball, with a weight of 200 grams, tied to a string rotates around in a horizontal plane. Period of rotation is 2 seconds. What is the force (in N) which acts on the string? The length of the string is 0.5 meters.
asked by Steven 
English
Discuss your understanding of the term ‘Tense’ used in grammar
asked by pinki 
College Algebra
Directions: Find the REAL solutions of the equation x^32.6x^2=3.93 Please help, its for my final!
asked by Courtney 
Physics
If given the ratio of temperatures in Celsius to Kelvin for Gold to silver as 1.10614 to 1.08265. How can I find the temperatures of each individual element form just this information?
asked by Lin 
spanish help
I need help translating this sentence into spanish I also experience a shortness of breath when I am taking long walks or walking up the steps.
asked by Anonymous 
9th grade
a object has a mass of 30 grams and a volume of10 cm^3. what is the density of the material?
asked by ceeceee 
math
toy rubber balls are packaged in a circular cylinder that holds 3 balds. the diameter of each ball is 3.7 cm find the volume of the circular cylender use 3.14 to represent
asked by Frida 
physical science
how would you classify a solution that contains 1.5g of lithium carbonate in 100g of water at 20 degrees
asked by kala 
English
Use semicolons or commas to revise each comma splice or fused sentence into a correct compound sentence.? 1. The group released a new CD today; however it will not be available for a month. The group released a new CD today; however it will not be
asked by pinki 
English
Express views on the given topic in paragraph form. It should comprise of 100130 words.? "Giving is better than receiving." Comment.
asked by pinki 
bio
Artificial sweeteners, colorants, oils, and medications are manufactured after they are accepted by the U.S. FDA. In order to have such acceptance for public use, companies have to complete exhaustive testing to demonstrate the safety of their products.
asked by Anonymous 
7th grade
2(2.5b9) + 6b= 7 what is b
asked by Daniel 
Chemistry
A 22.5 gram sample of ammonium carbonate contains ? mol of ammonium ions?
asked by Gina 
College Physics II
What is the longest wavelength light capable of ionizing a hydrogen atom in the n = 4 state? i know that Solve h c/L = (Rydberg)/6^2 for L something along those lines... but what am i solving for and what is c and h?
asked by VJC 
College Algebra
Solve for C 2a=(5bc)/(3c+1)
asked by Courtney 
Chem
What is the empirical formula of a compound that contains 27.0%S, 13.4%O,and 59.6%Cl by mass?
asked by Kay 
chemisty
how many grams of Na are needed to react with H2O to liberate 400mL of H2 gas at STP?
asked by justin 
chemistry
Write the 12 mole ratios that can be derived from the equation for the combustion of isopropyl alcohol?
asked by stephanie 
Math
At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product
asked by Rena 
Chemistry
Which compound would be ionic? H2O, CO2, SrCl2,SO2, H2S
asked by Tony 
English
Can you help me check these sentences, too? Thank you very much. 1) Though many people don’t care what they wear, most people don’t like wearing oldfashioned (unfashionable) clothes. 2) In other words, they follow the latest fashion and are easily
asked by Franco 
Keyboarding and word processing
You're Creating A Table With Borders All Around The Cells Showing. Another Word For This Type Of Table Is A. Open. C. Boxed. B. Closed. D. Celled?
asked by Nana 
physics...
A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (a) Determine the satellite's altitude above the surface of the Earth. i'm using the equation Gm/(r+h)=9.8 where h=altitude and i keep coming up with the wrong answer.
asked by kaitlyn 
Bio
As a scientist, you are assigned the task of finding out if the disappearance of a particular fish species from a lake in the Northwestern United States is due to acid rain resulting from industrial air pollution. Identify alternative hypotheses that could
asked by luly 
physics
The coefficient of kinetic friction for a 22 kg bobsled on a track is 0.20. What force is required to push it down a 6.0° incline and achieve a speed of 70 km/h at the end of 75 m?
asked by jen 
chemical
how i can streched the stoichemtric chart for air at 20.40.60.80 c(Temperature)
asked by adelnawaseh 
physics
meerany A flat (unbanked) curve on a highway has a radius of 220.0 Ill. A car rounds the curve at a speed of 25.0 m/s. (a) What is the minimum coefficient of friction that will prevent sliding? (b) Suppose the highway is icy and the coefficient of friction
asked by aleen 
physics
The magnitude of the scalar product of vectors A and B is three times as large as the magnitude of the vector product of the same two vectors. If they were placed tailtotail in space, A and B would form an angle of approximately how much?
asked by Edith 
English
o Identify which paragraph was more effective and analyze why this is so. o Include a discussion of sentence variety and the rhythm of the author’s writing. o Focus on the writing rather than the opinions presented. o Underline your topic sentence. Did I
asked by Jen 
Spanish
22. ¿Te gustan _______ pantalones ___? a. estos/marrones b. rojos/esos c. negros/estos d. el/grises A? 26. Llueve y hace frío hoy. _________ a. Menos mal que tengo una maleta b. Regreso a las tres c. No puedo tomar el sol d. ¿Dónde están mis anteojos
asked by mysterychicken 
Art History
7. Compare the naturalism of Chinese art of the 10th to 12th centuries with the Western Romanesque art of the same time period. Use the Guanyin Bodhisattva, the handscroll, Ladies Preparing Newly Woven Silk, and the landscape paintings for specific
asked by Sherry 
math
y= x+1 using the numbers 2,1,0,1,2 as x
asked by love 
Chemistry
using the gas laws, What is V in the table below? initial: 1420 torr 75 mL 200 K Final: 760 torr V 360 K What is T using the gas laws? Initial: 91.8 mL 365 K Final: 45.8 mL T
asked by Becca 
Chemistry
Calculate the energy of a photon of light with a wavelength of 360 nm?
asked by Becca 
math
a wagon train had ninetysix wagons each carrying the same number of people. when twelve broke down, each of the other wagons had to carry one more person. How many people were in each wagon originally.
asked by Jay 
Chemistry
A sample of unknown ore was analyzed and fgound to contain 12.7% Al, 19.7% N,and 67.6% O. What is the empirical formula of this ore?
asked by Becca 
science project
I need help writing my abstract for my science project and it's the only thing I have left to do. It's very fustrating, so is there anyone who can help me plz?!!!!!!!
asked by yvonne 
Chemistry
What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)
asked by Becca 
math
The volume of a ball is 288 pi cm^3. Find the dimensions of a rectangular box that is just large enough to hold the ball.
asked by ray 
college
A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What are the upper and lower control limits for a sample size of 100? 2. Recompute the upper and
asked by jackie 
Cal
Find the slope of the tangent line to the curve at (2,1) x/y + x^2y^2 = 6
asked by jordan 
Math
The mass of the solid inside the sphere: x^2+y^2+z^2=1, above the xy plane and below the cone z=SqRT(x^2 + y^2. It's mass density is equal to the square of a distance from the origin, setup in both spherical and cylindrical coordinates. I don't have to
asked by Justin 
health
What is the role of administrative agencies in the current health care environment?
asked by jeanna 
Physics
As you know, a cube with each side 4 m in length has a volume of 64 m3. Each side of the cube is now doubled in length. What is the ratio of the new volume to the old volume? Why is this ratio not simply 2? Include a sketch with dimensions.
asked by Coty 
math
A diameter of a circle is perpendicular to a chord whose length is 12 inches. If the length of the shorter segment of the diameter is 4 inches, what is the length of the longer segment of the diameter?
asked by Lisa 
math
Two secant segments are drawn to a circle from a point outside the circle. The external segment of the first secant segment is 8 centimeters and its internal segment is 6 centimeters. If the entire length of the second secant segment is 28 scentimeters,
asked by Don 
math
What is the mode of these numbers19,20,32,26.Show me how you got your answer.
asked by Michelle 
Chemistry
Calculate the pH of an aqueous solution at 25 degress C that is .41 M in phenol (C6H5OH). Ka for phenol=1.3 x 10^10.
asked by Natalie 
Chemistry
What is the original molarity of a solution of a weak acid whose Ka=3.5 x 10^5 and whose pH is 5.28 at 25 degrees C?
asked by Natalie 
5th grade
What is the mode of these # 19,20,32,26
asked by Michelle 
Chemistry
An aqueous solution of an unknown, monobasic weak base has an initial molarity of .176 M and a final[OH] of .0000158 M. What is the Kb of the unknown base?
asked by Natalie 
chemistry
What is the original molarity of an aqueous solution of ammonia (NH3) whose pH is 11.10 at 25 degrees C? (Kb for NH3=1.8 x 10^5)
asked by Natalie 
CHemistry
Calculate the pH of a .25 M ammonium acetate (CH3COONH4) soluton. I thought u just did log(.25) but it keeps saying that i have the wrong answer.
asked by Natalie 
H NMR
C4 H10 O2 ppm = 3.25 singlet 6H ppm = 3.45 singlet 4H
asked by josh 
spanish
___(1)___ (ser) una noche suave de primavera. Tumbados en el césped (lying on the grass) María y Jose ___(2)___ (observar, observed) al cielo (sky) A veces, un viento suave ___(3)___ (turbar, moved) las blancas cortinas (curtains) y María y Jose
asked by whitney 
Chemistry
CaO(s) + 3C(s) > CaC2(s) + CO(g) deltaHrxn = +464.8 kJ/molrxn Is the reaction endothermic or exothermic? What is the enthalpy change if 10.0 g of CaO is allowed to react with an excess of carbon?
asked by Jake 
chemistry
To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ? Chemistry...Help!!  Dr Russ, Wednesday, December 8, 2010 at 4:43am Molar mass of CuCl2 is 134.5 g mol^1 so solution needs
asked by Lisa, Help needed! 
algebra
reduce the fraction 6x/12x to lowest terms.
asked by K 
Math
An Antique dealer visited three shops. she spend $25 at the first shop. At the second shop, she spent half of her remaining money. At the third shop, she spent one third of her remaining money and had $60 left. How much money did the dealer have orginally?
asked by Anonymous 
GenChemistry
Exposure to high doses of microwaves can cause tissue damage. Estimate how many photons with a wavelength = 12cm, must be absorbed to raise the temperature of your eye by 3.0 deg C. Assume the mass of the eye is 11g and its specific heat is 4.0 J/gK
asked by Jake 
Geometry
An Antique dealer visited three shops. she spend $25 at the first shop. At the second shop, she spent half of her remaining money. At the third shop, she spent one third of her remaining money and had $60 left. How much money did the dealer have orginally?
asked by Anonymous 
ALgebra word problem
one number is 6 more than another. their product is 91. what is the number?
asked by mike 
Physics
A violin has an open string length (bridge to nut) of L=32.7 cm. At what distance x from the bridge does a violinist have to place his finger on the fingerboard to play a C (523.3 Hz) on the A string (fundamental frequency 440 Hz)?
asked by Nadya 
Physics
Initially, you hear the siren at 90 dB. When the distance between you and the ambulance is a quarter of what it was initially, at what intensity level do you hear the siren? Assume that the siren is emitting sound equally in all directions.
asked by Nadya 
math
mr smith wants to increase the size of his circles radius by 2 feet write a formula that can be used to find the circumference of the large circle
asked by elias 
preschool
hello i need help with a lesson plan i need to find one regarding diversity, and whats the concept?
asked by nataly 
prealgebra
k im not sure how im supposed to do this 3(x+2)= 52(x3) i need to know x
asked by amanda 
chem 21
whatvolume will 1.00g h2O occupy if it is converted to steam at 100degree Cand 1.00 atm
asked by franko 
geometry
What equation will express the relationship between the number of side, s, and the number of lines of symmetry, l, in a regular polygon
asked by LJJ 
algebra
reduce the fraction 6x/12x to lowest terms
asked by K 
geometry
do the lenghts 11, 15, and 40 make a triangle?
asked by alexis 
social studies
What is the significance of immediate news media delivery on culture?
asked by Anonymous 
MATH
solve (x3)(x+3)
asked by Veronica 
calculus
let K=1/(1/4) if x=K/(Kx), find x
asked by Anonymous 
algebra
What is the check of 40/5=8
asked by Jalen 
chemisty
when looking at a chemical equation what are the evidences that a chemical reaction has occured. Or what is the evidence that it has not occured thanks:):)
asked by hannah 
Trig
How do I do this? I punch the numbers into my calculator, and they don't work. B=sin^1 (12/7 sin42\[Degree])
asked by Jane 
Chemistry
Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?
asked by Brittany 
Chemistry
Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?
asked by Brittany 
arithmetic
justins father says that he will not plant less than a square meter of any vegetable.design a garden with the largest possible amount of land planted in potatoes that fits the condition of the problem and hat least one square meter allotted for each
asked by Anonymous 
6th grade
justins father says that he will not plant less than a square meter of any vegetable.design a garden with the largest possible amount of land planted in potatoes that fits the condition of the problem and hat least one square meter allotted for each
asked by Anonymous 
physics
While throwing a football, you exert a forward force of 50.0N on it and push it forward a distance of 1.2m. How much work do you do on the football?
asked by Theresa 
alg 2
3x^2243=
asked by katelyn 
englsh
need help in comparing Mercutio in romeo and juliet with riff in westside story
asked by Zack 
algebra
The sides of a square sheet of metal are of length 30 cm. A quadrant radius 15 cm is cut from each of the four corners. What is the perimeter of the shape which is left?
asked by Nicola 
cemistry
what information is provided by the atomic mass?
asked by bre 
algebra 1
can some one please help me with this equation using the addition principle 9/5 + x = 2/9 Please explain how you got your answer in all phases. Thanks
asked by robbie 
History
what are some good examples of Debate & Diplomacy: Successes, Failures, Consequences. in the past?
asked by sabina 
english
Im in third grade and i don't understand colons.i have to proofread a paragraph and combine them using colons.
asked by cal 
decimals
what is the value of the 1 in 93.01?
asked by fran 
Physics
An electron in a cathoderay tube is traveling horizontally at 2.10 x 109 cm/s when deflection plates give it an upward acceleration of 6.39 x 1017 cm/s2 How long does it take for the electron to travel 6.20 m? What is the vertical displacement? I got the
asked by Avalon 
Algebra
3x2y=5 and 4x+3y=18 i need to graph and find the intersection
asked by Mckenna 
Com 155
I following is a paragraph regarding my experience with credit cards. I had to use least five adverbs and five adjectives in my paragraph. I have to bold the adverbs and underline the adjectives, the only problem is I am having a hard time figuring out
asked by Leigh 
English
1. Don't touch the food with your hand. I think it's so _______. (Wound you name some suitable expressions for the blank?) 2. How many hours do you surf the Internet? 3. How many hours do you surf on the Internet? (Which one is correct, #2 or #3?)
asked by rfvv 
chem plz check my work
2. Given the following equation, C2H5OH(l) + 3 O2(g)> 2 CO2(g) + 3 H2O(l) How many liter of CO2 are expected in the combustion of 12.0 grams of ethanol? My work: 12.0g C2H5OH X 1 mol C2H5OH/46.08g C2H5OH X 2 mol CO2/1 molC2H5OH X 22.4L CO2/1 mol CO2 =
asked by hannah 
7th grade
WHATS 111,111 IN PRIME FACTORED FORM AND IN TREE FORM?
asked by Aileen Jiminian 
chemistry
Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks!
asked by Stacy 
Please help childcare
i need to find 5 books that support development of gender identity by portraying males and females in diverse roles. but it has to be from 2005 till 2010 I found 1 but i cant seem to find more?
asked by sasha 
English
1. Seeing the policeman, he ran away. 2. When he saw the policeman, he ran away. 3. As soon as he saw the policeman, he ran away. (Which one is similar to #1, #2 or #3?)
asked by rfvv 
math
sin^1 (12/7 sin42\[Degree]) b = sin 1 (12/7 sin 42 degrees) How do I do this?
asked by Jane 
Chemistry
You react ammonia and oxygen, and at the end of the experiment you find that you produced 20.7 g of water and have 8.52 g of ammonia left over. Determine the mass of oxygen reacted.
asked by Adog 
physics
A plane designed for vertical takeoff has a mass of 51 kg. Find the net work Wnet as it accelerates upward at 1 m/s2 through a distance of 34 m after starting from rest.
asked by anna 
Chemistry
You react 25.0 g hydrogen gas with 30.2 g oxygen gas. Determine the mass of water that can be produced from these reactants.
asked by Adog 
chemistry
magnesium has 3 isotopes. Magnesium24 has a percent abundance of 78.99%. Magnesium26 has a percent of 11.01%. what is the percent abundance of magnesium25? assume that there are no other magnesium isotopes. how do i do this please help
asked by monique n 
Algebra
express log (3x^5y^3/z^3) as the sum and difference of logs with no exponents.
asked by peggy 
5th grade
if a line is measured as 1 and 4/8 inches long explain how you could simplify the measurement
asked by michelle 
english
Hi need help with need thesis. My thesis before was "Justice is not being severed in the case of the Somali pirates. Truth is being hindered from others about the Somali pirates and how the Somali pirates emerged in the beginning. How can I come up with
asked by Mariae 
chemistry
Calculate the atomic mass of iridium. Iridium has two isotopes. Iridium191 has a mass of 191.0 amu and a percent abundance of 37.58%. Iridium191 has a mass of 193.0 amu and a percent abundance of 62.42%. how do i do this
asked by monique n 
Chemistry
Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?
asked by Brittany 
college
Communication channels  physical presence, writtenprinted, electronic/computer what are the advantages and disadvantages of each?
asked by Gwen 
trig
solving radical equations... help! 5+¡în+1= n+4
asked by bob 
Chemistry
How many moles of carbon monoxide gas are produced when 2.88 moles of SnO2(s) react with excess carbon according to the equation below? SnO2(s) + 2C(s) > Sn(s) + 2CO(g) How do you figure all of this out?
asked by Lauren K. 
chemistry
Iodine131 is used to destroy thyroid tissue in the treatment of an overactive thyroid. the halflife of iodine131 is 8.02 days. if a hospital receives a shipment of 200.0g of iodine131, how much iodine131 would remain after 32 days?
asked by monique n 
algebra 1
Solve the equation 7z+30=5
asked by Joe 
chemistry
Mercury197 is used for kidney scans and has a halflife of 3 days. if the amount of mercury197 needed for a study is 1.0 grams and the time allowed for shipment is 15 days, how much mercury197 will need to be ordered.
asked by monique n 
social stuudies
why did the colonists draft the olive branch petetion?
asked by blahhh 
chemistry
How much heat energy in KJ is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 20.91 degrees C to 26.45 degrees C? The bomb has a heat capacity of 469 J/degrees . The Calorimeter contaains 792
asked by Brittany 
Help
How are oxygen and ozones alike? How are xyggen and ozone different?
asked by Please help 
comm 155 continued
I following is a paragraph regarding my experience with credit cards. I now need to bold the nouns and pronouns and underline the verbs. I do not know why, but I am having a hard time with this. Any help please. When I was 18, I received my first credit
asked by Leigh 
algebra
A flagpole at a right angle to the horizontal is located on a slope that makes an angle of 12 degrees with the horizontal. The pole's shadow is 16 meters long and points directly up to the slope. The angle of elevation of the sun is 20 degrees. Draw the
asked by marlie 
science
What are the cell walls of fungi made of?
asked by Katherine 
physics
the separation of the foci of an ellipse that describes a planet's orbit derermines A eccentricity of the orbit B period of the orbit C size of the orbit D all of the above. I think it is A because the closer the foci, the more circular versus elliptical
asked by anonymous 
Physics
When railroad tracks are installed, gaps are left between the rails. Each steel rail is 8.0m long and has a crosssectional area of 0.0020m^2. On a hot day, each rail thermally expands as much as 4.0mm. If there were no gaps between the rails, what would
asked by Wendi 
Science 6th
how can you tell if an ear of purple corn was bred for it's purplr trait?
asked by Patti 
calculus
The moment of inertia about the pole(origin) of the plane region which is inside the cardiod: r = 1 + cosO and outside the circle r =1. It's mass density is equal to it's distance from the pole..... I need someone who is way smarter than me to help with
asked by Justin 
geometry
arc AB is 55 degrees. the radius of the circle is 4 inches. what is the length of arc AB?
asked by Anonymous 
math
A plane traveling at 600 mph leaves 3/4 hr earlier than a plane traveling at 800 mph. when will the second plane surpass the first?
asked by regina 
statistics
Given the following data: 18,12,18,20,16,20,18,36,16,18, 14,20,24,20,5,18,10,15,24. Determine the mean, median and mode of this data
asked by toya 
math
Look for a pattern in the table. Then write an equation that represents the table. x 0 1 2 3 y 1.5 4 6.5 9
asked by Amanda 
10th grade Chemistry
What is the hydroxide ion concentration in a solution with [H3O+] = 7.67*10^9 M?
asked by gab 
algebra
what is a distibutive property equation equaling 36
asked by Anonymous 
Math Correction
Explain how you can tell(without graphing) that the function has no x intercept and no asymptotes. What is the end behaviour? r(x)= x^6+10 / x^4+8x^2+15 How would I solve this? I know it has something to do with factoring but im not sure what else to do.
asked by Amanda 
math
The bands sell all but 500 tickets for an 800 p.m concert at Badger Arena. At 730 p.m ,18,777 people have arrived. How many people are not at the arena yet?
asked by arjel 
business law
Dale Emerson served as the chief financial officer for Reliant Electric Company, a distributor of electricity serving portions of Montana and North Dakota. Reliant was in the final stages of planning a takeover of Dakota Gasworks, Inc. a natural gas
asked by james 
4th grade
what is one way in which the state government and the federal government are different from each other?
asked by Darien 
math
monthly payments on a $100000 loan at 5.5% annual interest amortized over 100 years will be close to?
asked by evan chen 
4th grade
The federal government affects the whole _______ _________ and the state government affects only the __________.
asked by Darien 
11th grade
how can i write a acrostic poem on beowulf?
asked by Anonymous 
science
How much work does it take to hold a 150 N weight above your head for 3 seconds?
asked by Niners 
Physics
What is the difference in blood pressure (mmHg) between the top of the head and bottom of the feet of a 1.008 mtall person standing vertically?
asked by c 
math
The volume of a ball is 288 pi cm^3. Find the dimensions of a rectangular box that is just large enough to hold the ball. Use 3.14 for pie
asked by ray 
college
Dale Emerson served as the chief financial officer for Reliant Electric Company, a distributor of electricity serving portions of Montana and North Dakota. Reliant was in the final stages of planning a takeover of Dakota Gasworks, Inc. a natural gas
asked by james 
algebra
whta is the rule? m 2 4 6 8 n 18 16 14 12
asked by samantha 
English
I still have a few doubts. I hope you can have a look at them, too. Thank you. 1) The population of New York is 8,391,881 (people?). 2) How big/large is the population of New York? 3)The event takes place twice a year, once for springsummer and once for
asked by Franco 
AP Physics B
An object of mass 3.2 kg is allowed to fall from rest under the force of gravity for 3.5 s. What is the change in its momentum? Ignore air resistance.
asked by Jamie 
5th grade
I need help! I am supposed to complete the table and write an equation to show the relationship. The table has input of x, 0,1,2,3,4,5 and output of y,4,10,16,22,and the last two outputs are blank. I think they are 28 and 34but what is the relationship?
asked by brook 
Poem Contset!!
There is a poem "contest" at my school and If I write a poem that's good it may go in a book! The only problem is I can't really write a GOOD poem. Can anyone post a site that may help Me? THanks, ErIn
asked by Erin 
Algebra
Describe two laws of exponents and provide an example illustrating each law. Explain how to simplify your expression. How do the laws work with rational exponents?
asked by Sam 
Math/Statistic
If I'm doing a pearson's and need to know the percentage of predicitability... all I have to do is work out the pearon's, right?
asked by Laur 
high school physics
Annie rides her snowboard down a hill sloped at 25 degrees. The coefficient of kinetic friction between her and her skies is .15. If her mass is 55 kg, hw fast is she excelerating? Assuming she starts from rest and the equation is v=v+a*t, what is her
asked by Jess 
Math help finishing
A right triangle has an area of 84 ftand a hypotenuse 25 ft long. What are the lengths of its two sides? Ive gotten this far: 25^2= a^2+b^2 a=25b 84= ab/2 168= 25bb^2 b^225b+168=0 I then use the quad. formlua to solve for b... but I get an error. Can
asked by Lindsay 
Calculus
Find the horizontal asymptote of f(x)=e^x  x lim x>infinity (e^x)x= infinity when it's going towards infinity, shouldn't it equal to negative infinity, since 0infinity =  infinity lim x> infinity (e^x)x= infinity
asked by sh 
science
why is it important to know your family medical history
asked by tina 
Precalculus
2sin^2x+3cosx=3
asked by Megan 
6th grade
how do you do rate of change?
asked by alexandra 
science
the separation of the foci of an ellipse that describes a planet's orbit derermines A eccentricity of the orbit B period of the orbit C size of the orbit D all of the above. I think it is A because the closer the foci, the more circular versus elliptical
asked by chelsie 
Teachers aide
5 pamplets or copies that help parents understand how children grow and learn.
asked by ana 
Chemistry
The specific heat capacity of Lead is 0.127J/degrees C*g. What is the molar heat capacity of Lead? What is the heat capacity of a lead cylinder that has a mass of 235000g?
asked by Brittany 
physics
Bob is riding his bike along at 2m/s and drops his 2kg backpack from a height of 1.5 meters. What is the backpacks resulting velocity when it strikes the ground?
asked by lesly 
Teachers aide
music or words for four children's songs 2 must be from other cultures.must write song title, the name of the person who wrote it, the publisher's name and city and the copyright date. title: words by: music by: publisher,city,country: copyright date:
asked by ana 
Precalculus
2sin^2x+3cosx=3 find all solutions in the interval [0,2pi]
asked by Megan 
5th grade math
A set of books fills a shelf that is 24in long each book is 3/4 inch thick. How many books are in the classroom shelf? Would it be 18 ???
asked by jill 
math
A circular piece of sheet metal has a diameter of 20 in. The edges are to be cut off to form a rectangle of area 160in^2. What are the dimensions of the rectangle?
asked by Sabel 
math
in a class of 50 students, 29 are democrats, 11 are business majors, and 5 of the business majors are democrats. If one student is randomly selected, find the probability of A. choosing a democrat who is not a business major B. choosing a student who's
asked by Anonymous 
geometry
100.0 g of copper(II) carbonate (molar mass = 123.56 g/mol) was heated until it decomposed completely. The gas was collected and cooled to room temperature and normal pressure (25¨¬C and 1.00 atm). What volume of carbon dioxide was produced? The reaction
asked by sassy 
interval in math
what is the interval for the following set of numbers 3,4,6,7,8,3,2,1
asked by Tim S 
com155
use five adverbs and five adjectives to write about a movie. Compare an event to similar events using three comparatives and three superlatives.
asked by kelly 
uop
Choose some numbers and work in a small group to figure out how to apply the tests for divisibility by 4, 6, 7, 8, 9, and 11 given on pp. 211–214. a. Use a calculator to select some numbers that are and some that aren’t divisible by these numbers. Give
asked by bb 
Economics
Explain how the reluctance of oil and gas producers to drill for shallow gas was consistent with the law of supply?
asked by michael 
Math
Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also
asked by Rena 
Science
Describe the tools and materials that are provided by soil to play football
asked by Airon 
Logarithm law question
Hello, i was wondering if e^(2t) is equivalent to e^(t^2). I cant seem to find if this is true or not. Thanks
asked by Moi 
Chemistry. please help
A 0.12 g sample of unknown was placed in a flask and dissolved in 125 mL of deionized water. A solution of HCl (0.10 M) was used to titrate the sample, and 18 mL was required to reach the endpoint. What is the formula weight of the unknown?
asked by Stephanie 
Chemistry
Given 175 liters of SO3 at 800 torr and 100 degrees C, find the volume at STP, give the mass of the sample and give the number of molecules in the sample. Can somebody please explain how I figure this out? I'm so lost. :{
asked by Annabella 
11th grade
I NEED URGENT HELP!! Bob is riding his bike along at 2m/s and drops his 2kg backpack from a height of 1.5 meters. What is the backpacks resulting velocity when it strikes the ground?
asked by lesly 
math
saving bond currently worth $7600 collects 5.5% annual simple interest each year. if the bond was purchased seven yeara ago, how much was it bought for?
asked by evan chen 
Spanish
36. Prefiero el té helado ______. a. la semana pasada b. cuando hace calor c. cuando hace frío d. cuando saco fotos B? 37. Estoy enfermo; no ______ ir de vacaciones. a. salgo b. voy c. pienso d. estoy Not sure :/ 38. ¿Qué ______ hacer tú y yo para su
asked by mysterychicken 
physics
Joshua throws a stone horizontally from a cliff at a speed of 20m/s, which strikes the ground 2.0 seconds later a. use your knowledge of vectors and show that the stone strikes the ground at a speed of about 28m/s. b. At what angles does the ball strike
asked by sabina 
Calculus
If f(x)= sqrt(4sin(x)+2), then f'(0)=
asked by Anna 
science
How much force will a tennis racket need to exert on a tennis ball, with a mass of .67 kg, to make it accelerateat a rate of 5,600m/s^2?
asked by susan 
physics
A tank of water 3 meters deep sits on a table 1 meter tall. A hole is located 2 meters from the bottom of the tank. Water flows out of the hole and strikes the ground. Where does it strike the ground? Assume incompressible, non viscous flow.
asked by olu 
algebra
56+y>113 solve the inequality
asked by joe 
math
1/2 + 2/5 in simplest form?
asked by matthew 
College Algebra
Carbon14 Dating. Only 10% of the carbon14 in a samll wooden bowl remains. How old is the bowl? Half life of carbon is 5700 years.
asked by Vince 
science physics
A giant crane in Washington DC was tested by lifting a 2.232x10^6 kg load. Find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2
asked by Melina 
English
1.Everyone in the club (has, have) read this book. 2.Most of the field (needs, need) mowing. Tell if the indefinite pronoun is singular or plural. Then choose correct word in () 1.singular=has 2.singular=needs
asked by Chris 
Chemistry
How would I go about doing this problem? 146 mL of wet H2 gas is collected over water at 29.0 degrees C and room pressure of 750 torr. Give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry
asked by Marie 
high school physics static friction
The system shown below is in equilibrium. Using the fact that block A is placed on a table, has a normal force of 40.2 N and it is not moving, what is the coefficient of static friction on block A? I know you can't answer this but if you have any
asked by Jess 
physics
In a time of 10s, a 70 kg student runs up 2 flights of stairs whose combined vertical height is 8.0m. compute the student's power output in doing work against gravity in (a)watts and (b)horsepower
asked by Wendi 
math
b/4 >5 solve inequality
asked by joe 
Scince
How do you think you could increase the purity of the nitrogen gas?
asked by AJ 
chemistry
Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks! chemistry  DrBob222, Wednesday, December 8,
asked by Stacy 
chemistry  chromatography
Hello, can you tell me why different colors have different rf values
asked by dan 
college
use the five steps for problem solving. the average of two test scores is 79. if one test score is eleven less than the other, what are the two test scores?
asked by kristie 
chemistry
how much energy would it take to completely melt 200kg of lead if the lead is currently at 25 degrees celcius
asked by Trey 
Calculus I
A squarebottomed box with no top has a fixed volume, V. What dimensions minimize the surface area?
asked by Nisa 
Calculus
To construct a tincan, V=32pi m^3, The cost per square meter of the side is half of the top and bottom of can. What are the dimensions and the cost? V=πr²h=32pi SA=2πr²+2πrh h=32/r² Domain={r>o} Let x be the cost, I subbed 32/r² for h
asked by sh 
7th grade
i need help with social stuides describe islam in the 600's
asked by maya 
Maths
How to work out the comparison 13 out of 39 as a percent
asked by Shannon 
chemistry
If a volume of nitric oxide gas at 25.0°C increases from 2.00 L to 3.00 L, what is the final Celsius temperature? Assume pressure remains constant
asked by Anonymous 
chemistry
146 mL of wet H2 gas is collected over water at 29.0 degrees celsius and room pressure of 750 torr. give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry H2 at room conditions and the
asked by melanie 
Math 157
Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also
asked by Rena 
english
unscramble the country sdettaietnsu
asked by bobby 
General Chemistry
An unknown compound has a formula of CxHyOz. You burn 0.1523 g of the compound and isolate 0.3718 g of CO2, and 0.1522 g of H2O. What is the empirical formula of the compound? If the molar mass is 72.1 g/mol what is the molecular formula?
asked by Jashmid 
physics
Consider a level flight turn of a propellerdriven airplane in which the airplane makes a complete circular turn in 1.6 min. If the plane's speed is 180 m/s, what is the radius of the circle? 1 m What is the centripetal acceleration of the plane? 2 m/s2
asked by beth 
World History
What Iberian institutions were transplanted to the Americas?
asked by Lala 
English
1. None of the guests (has, have) left. 2. Each of these apples (is, are) ripe. 3.One of my favorite songwriters (is, are) Billy Joel. 4.Some of my cousins (has, have) come to my party. 5.All of the bread (was, were) eaten. Tell if the indefinite pronoun
asked by Chris 
PHYSICS
Search: a 1.0 kg mass weighs 9.8 n on earths surface and the radius of the earth is roughly 6.4x10 to the 6 m. what is the mass of the earth and the average density of Earth
asked by Tracey 
General Chemistry
CaO + 2NH4Cl > 2NH3 + H2O + CaCl2 If 112 g of CaO and 224 g of NH4CL are mixed the theoretical yield of NH2 is 68.0 g. If only 16.3 g of NH3 is actually obtained, what is the percent yield?
asked by Jashmid 
cal 1
Find the dimensions of the rectangle of largest area that has its base on the xaxis and its other two vertices above the xaxis and lying on the parabola. (Round your answers to the nearest hundredth.) y = 7  x^2
asked by Jordan 
Cal 1
The top and bottom margins of a poster are each 12 cm and the side margins are each 8 cm. If the area of printed material on the poster is fixed at 1536 cm^2, find the dimensions of the poster with the smallest area.
asked by Lee 
World History
how did the caribbean serve as a model for the spanish empire?
asked by Lala 
Cal 1
Find the most general antiderivative of the function. Use C for any needed constant. f(x) = x  6
asked by Tweak 
Cal 1
Find the most general antiderivative of the function. Use C for any needed constant. g(θ) = cos(θ)  5sin(θ)
asked by Nykyrian 
Chemistry
If you have Hydrochloric acid, how many grams of aluminum must you use to produce 57.0 L of hydrogen at STP? 2Al(s)+6HCl(aq) > 3H2(g)+2AlCl3(aq)
asked by Brittany 
World History
How did the Portuguese experience in Brazil differ from the Spanish experience in Latin America? ... I don't really have any idea HELP please.
asked by Lala 
6th grade
0.4/2.4=f/6 Dont know how to solve please explain so i can know thank u
asked by CJ 
General Chemistry
2Fe2O3 + 3C > 4Fe + 3CO2 If 6.2 mol of Fe2O3 is used, what amount of C is needed, and what amounts of Fe and Co2 are produced?
asked by Jashmid 
Calculus
If y=xln(x)^2 , then dy/dx=
asked by Anna 
Math Finite
College students were polled about favorite types of food. 50% liked pizza, 40% liked hamburgers, and 20% liked both. What percent liked pizza OR hamburgers?
asked by Erkaluv 
english
can someone help me need ideas for science fiction story and the rationale behind it, The Martian Chronicles 1950
asked by carole 
Calculus
A line through the origin, rotates around the origin in such a way that the angle, ¦È, between the line and the positive xaxis changes at the rate of d¦È/dt for time t¡Ý0. Which expression gives the rate at which the slope of the line is changing?
asked by Anna 
chem
AgNO3 + NaCl produces AgCl + NaNo3 how much AgCl is produced when 3.10g of AgNO3 and .600g of NaCl react?
asked by alex 
chemistry
how would you solve this??? in short and long form? 238 12 (4) 1 92 U + 6 C > 0 N + _____
asked by monique n 
English
Can anyone see any rhetorical device in this sentence? His father’s voice: You gonna let ’em push you around like that, boy? “No sir, Daddy,” Perry whispered. “I sure as hell ain’t.”( Sigler 227)
asked by Andy 
economics
Give an example of how confidence intervals could be used in your workplace.
asked by Anonymous 
organic chwmistry
When bromobenzene reacts with propene in a Heck reaction, two constitutional isomers are obtained as a product. Give the structures of the two
asked by jimmy 
Algebra
How can you determine if two lines are perpendicular?
asked by Cathy 
science physics
A giant crane in Washington DC was tested by lifting a 2.232x10^6 kg load. Find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2
asked by Melina 
chemistry
Determine the mass of NaCl in 1.0 L of 3.0 % by mass aqueous solution of sodium chloride. The density of the solutions is 1.10 gmL1 please explain all the steps, thanks!
asked by Stacy 
PreCalc
Can anyone help with the following problem please...Thank u so much Let f(x) =9x. For the area above the xaxis and between the lines x= 9 and x=18 a. draw and label a sketch with the area shaded b. find the area of the region in the xyplane under the
asked by Amy 
Science
I need to have an essay written about a book and the scientific relation behind it. I would do it myself but I'm not sure I know what to do and it's a large portion of my grade and it's not due until June but I need it soon as possible so I can get the
asked by Mickie 
Physics
Imagine that a small bug is trapped between two blocks ( 10kg and 5kg) In each case a person applies a force of 150 N to the right, but the order of the blocks is reversed. In which case will the bug have a better chance of surviving? Calculate the force
asked by Jackie 
Chemistry
"A 25.0% solution of Al2(SO4)3 has a density of 1.75 g/ml. What is the mass of dissolved solute in 40.0 ml of solution?" How would one set this problem up?
asked by Kathryn 
statistics
Which statistical test woul you use to assess whether or not there is a relationship between the variables SEX and HOURLY WAGES?
asked by Dee 
math
A fence post is to be along side of a lot measuring 114 feet. 19 fence posts are to be used, 1 at each end and 17 equally spaced between the ends.What is the distance between centers of 2 consecutive fence post?
asked by Randu 
physics
A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (b) Determine the period of the satellite's orbit. the satilites altitude above the surface of earth is 6076312.71m. im using the equation P=2*pi*r/v and am coming up with 1.87
asked by kaitlyn 
statistics
A random sample of 20 hogs on farmer Brown's hog farm had an average weight of 350 pounds and a SD of 70 pounds. Find 95% confidence interval estimate of the mean weight of all farmer Brown's pigs.
asked by Lacey