Questions Asked on
June 25, 2011

Chemistry
What is the mass (in g) of 4.65x10^22 molecules of P4O10? ( I already calculated it and the answer is 0.1 grams of P4O10.) How many P atoms are present in this sample? Thank you!
asked by Mary 
physics
A conducting bar slides without friction on two parallel horizontal rails that are 50 cm apart and connected by a wire at one end. The resistance of the bar and the rails is constant and equal to 0.10 . A uniform magnetic field is perpendicular to the
asked by Vlady 
chemistry
if the diameter of a sodium atom is 3.14×10−8 cm, how many sodium atoms would fit along a line exactly 1.00 inch long?
asked by fiffy 
Chemistry
At high temperatures, sulfur combines with iron to form the brownblack iron (II) sulfide: Fe (s) + S (l)> FeS (s) How do you calculate the mass of FeS formed? Thank you!
asked by Mary 
physics
A rigid circular loop has a radius of 0.20 m and is in the xyplane. A clockwise current I is carried by the loop, as shown. The magnitude of the magnetic moment of the loop is 0.75 A · m2. A uniform external magnetic field, B = 0.20 T in the positive
asked by Vlady 
chemistry
what is the experimental errors in determining the formula unit of zinc chloride?
asked by anna 
statistics
1. The qualitycontrol inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Suppse the batch contains 2% defective syringes. Find sigma.
asked by Harley 
Physics
A 0.02 kglead bullet traveling 200 m/s strikes an armor plate and comes to a stop. If all of it's energy is converted to heat that it absorbs, what is the temperature change?
asked by Justin 
statistics
A student council is made up of 4 women and 6 men. One of the women is president of the council. A member of the council is selected at random at random to report to the Dean of Student Life. What is the probability a woman is selected? What is the
asked by Harley 
Math
A mother is 4 times as old as her daughter. In 4 years, the mother will be 3 times as old as her daughter. How many years old is the daughter now? I came up with two equations: M = 4D and M + 4 = 3(4 + D) and I got D to be 12 but that isn't the correct
asked by mjLa 
Physics
A 0.02 kglead bullet traveling 200 m/s strikes an armor plate and comes to a stop. If all of it's energy is converted to heat that it absorbs, what is the temperature change?
asked by Bob 
Statistics
A group of 6 children are choosing colors of pencils to use to draw a picture. The available colors are black, red, and blue. If the second child refuses to use red pencils and the third child refuses to use blue pencils, then how many ways are there for
asked by Anonymous 
Pyhsics
A 0.02 kglead bullet traveling 200 m/s strikes an armor plate and comes to a stop. If all of it's energy is converted to heat that it absorbs, what is the temperature change?
asked by Anonymous 
Chemistry
A voltaic cell is based on the following two half reactions: Fe2+(aq) + 2 e¯ > Fe(s); Eo = 0.44 V Cu2+(aq) + 2 e¯ > Cu(s); Eo = +0.34 V When [Cu2+] = 0.0500 M, Ecell = + 0.80 V. What is the [Fe2+] for these conditions?
asked by Marcelo 
Economics
Q = 400  20p TC = 10 + 5q + q2 Calculate the following: Profit max price Profit max quantity TR, TC, Profit, and the elasticity at profit max q and p.
asked by Susie 
Trig
A plane is flying at 240 mph heading North 60 degrees East. The wind is blowing at South 30 degrees East at 30 mph. What is the largest and smallest angles?
asked by Anonymous 
statistics
Scores on a certain test are normally distributed with a variance of 91. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure with 95.44 percent confidence that the sample mean will not
asked by vina 
algebra
List all possible rational zeros given by the Rational Zeros Theorem (but don't check to see which actually are zeros). (Enter your answers as a commaseparated list.) S(x) = 6x4 − x2 + 6x + 12
asked by kelley 
English
John was chosen captain of the team. in these sentence is captain subject? Who did this action?John or?What is object in this sentence? I think that John became captain of the team.Is it right?
asked by Bayarbold 
biology
1. Which statement is TRUE? a. A cell placed in an isotomic solution will swell. b. A cell placed in a hypotonic solution will swell. c. A cell placed in a hypotonic solution will shrink. d. A cell placed in a hypertonic soluction will remain the same
asked by akim 
math
Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. how many strips does she make?
asked by samantha 
Economics  Short run profit maximization
Given the following for perfectly competitive firm that has shortrun cost structure Output Marginal Cost 1 $10 2 $5 3 $12 4 $23 5 $40 Total fixed costs are $20 and the market price of the product is $25 per unit. How much output should the
asked by Raj Sree 
Statistics/Probability
2. Jim has a 5year old car in reasonably good condition. He wants to take out a $40,000 term (that is accident benefit) car insurance policy until the car is 10 years old. Assume that the probability of a car having and accident in theyear in which it is
asked by Harley 
Physics
If the elastic limit of steel is 5.0 multiplied by 108 Pa, determine the minimum diameter a steel wire can have if it is to support a 79 kg circus performer without its elastic limit being exceeded.
asked by Sarah 
English
During the afternoon, my cats are content to nap on the couch.What is the meaning of these sentence? I don't understand meaning of word "content" in these sentence.What is the meaning of sentence above?
asked by Bayarbold 
chemistry
State three examples each of acids, bases, and salts commonly used in therapeutic processes. From the examples you state, select one acid, one base, and one salt and describe how and where they are used in therapeutic processes. Please note that your
asked by mema 
physics
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45^\circ below the horizontal and is given an initial downward speed of 1.50 m/s. At the bottom of the arc, determine the centripetal
asked by Luis 
Physics
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45^\circ below the horizontal and is given an initial downward speed of 1.50 m/s. At the bottom of the arc, determine the centripetal
asked by Luis 
English
During the afternoon, my cats are content to nap on the couch.What is the meaning of these sentence? Content is the meaning of "the amount of a substance that something contains".Is it right?But I don't understand meaning of word "content" in these
asked by Bayarbold 
Chemistry
Lithium is a soft, gray; solid that has the lowest density of any metal. If a rectangular slab of lithium weighs 1.49x10^3 mg and has a volume of 2.76 cm^3, what is the density of lithium in g/cm^3? Please and thank you!
asked by Mary 
English
Can you please check these last questions, please? Thank you. 1) What major changes took place in England during the Industrial Revolution?/What changes did the industrial revolution bring to England? 2) What did the most important inventions concern?
asked by Henry2 
Physics
A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.80 cm into the water. What is the weight of the truck?
asked by Kelsey 
Chemistry
A reaction proceeds according to the following mechanism: Cl2 ⇌ 2 Cl (fast equilibrium) Cl + H2 ⇌ H2Cl (fast equilibrium) H2Cl + Cl → 2 HCl (slow) What is the rate law for this reaction?
asked by Martin 
Business Math 205
Calculate the PRESENT VALUE of the following ORDINARY ANNUITIES. Round to the nearest cent when necessary. Annuity Payment:($3,000) Payment Frequency: (Every Year) Time Period YRS:(15)Nominal Rate%:(10)Interest Compounded:(Annually)Present Value Of The
asked by James 
math
19. A high school soccer team has two goalies. Goalie A makes the save 80% of the time. Goalie B makes the save 75% of the time. If goalie A plays 35 of the games and goalie B plays 25 of the games then: a) Determine the probability that a save has been
asked by sally 
physics
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45^\circ below the horizontal and is given an initial downward speed of 1.50 m/s. At the bottom of the arc, determine the centripetal
asked by Luis 
chemistry
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate
asked by mema 
math
A basketball player has a 40% shooting average from the freethrow line. If she takes two free throws, estimate the probability that she will make both of them. Use the following list of digits which was taken from a table of random numbers. Let the digits
asked by amanda 
science
What hypotheses could you test to help resolve the debate that famines are caused more by human actions (or inactions) than by environmental forces?
asked by kevin 
Math/116
. The function C(g) represents the cost C of filling up the gas tank with g gallons of regular gasoline. Given the equation a) What does the number 3.03 represent?
asked by Angela 
calculus
5. Consider the circle x2 + y2 = 16 and the parabola y2 = 8x. They intersect at P and Q in the first the fourth quadrants, respectively. Tangents to the circle at P and Q intersect the xaxis at R and tangents to the parabola at P and Q intersect the
asked by shailja 
physics
A ball is thrown vertically upward with a velocity of 100m/s.It will reach the ground after hw many sec?
asked by aleeza 
Chemistry
The volume of an irregularly shaped solid can be determined from the volume of water it displaces. A graduated cylinder contains 19.9mL of water. When a small piece of galena is added, it sinks and the volume increases to 24.5mL. What is the volume of the
asked by Mary 
Chemistry
A volume of 60.0 of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 25.2 mL of 1.50M H2SO4 was needed? The equation is 2KOH+H2SO4>K2SO4+2H2O. I cant seem to
asked by Paris 
physics
a boy walks to a school at a rate of 6km with a speed of 2.5km/h and walks back with a constant speed of 5km/h. his average speed for round trip in km/h is ?
asked by aleeza 
math
Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. how many strips does she make?
asked by samantha 
chemistry
Discuss in detail the healthcare applications of chemical reactions. Which chemical reactions would you consider to be of importance to healthcare professionals? Why? In which situations are these chemical reactions useful to healthcare professionals?
asked by mema 
Grammar
Write a paragraph of at least 200 words identifying three challenges that might arise when writing a paper. Write a second paragraph of at least 200 words explaining the strategies you will use to overcome those challenges. When writing a paper there are
asked by Angelina 
Physics
two binary stars moving in a perfect circle orbit The stars have the same mass, the distance between them is one billion km (1x10^9 km), and the time each takes for one orbit is 10.4 Earth years. Determine the mass of each star (m1=m2). (this problem
asked by Luis 
Chemistry
Exactly 23.6 ml of a 0.131 N HCl solution was required for complete neutralization of 25.0 ml of an NaOH solution.What was normality of the NaOH?
asked by Rajan Khare 
mes
a solution of sugar in water is 5% by mass. how much sugar is present in 250 gm. of solution?
asked by dona 
math
give the number whose hundreds place is onethird of the greatest onedigit number, then tens place is twice the hundred place, the ones place is four times the digit in the hundreds place divided by 2, and the three digits in thousands period is the
asked by k.b 
statistics
The mean number of fitness magazines in a sample of homes is 16, the standard deviation is 5; and the mean for the number of pages of fitness magazines in a sample of homes is 43, with a standard deviation of 8. Which set of data set is more variable?
asked by Nicole 
science
name the water soluble substance witch added with delute hcl and produce gas tarn lime water milky?
asked by ashok 
English
I give an examination tomorrow.So I need a help. Nearly crying,her little sister wanted to be left ( )herself. You will choose your answers blow. a.for b.with c.on d.to I think that best answer is a.But It didn't match its answer.Its answer is d.But I
asked by Bayarbold 
business math 205
Calculate the future of the following Ordinary Annuities. Round to the Nearest cent when necessary. Annunity Payment ($3,000) Payment Frequency Every (6) Months Time Period (years) 10 Interest Compounded (Semiannually) Future Value Of The Annuity is What?
asked by James 
Physics
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45º below the horizontal and is given an initial downward speed of 1.50 m/s. find: At the bottom of the arc, determine the centripetal
asked by Luis 
chemistry
Which liquid will float on water? Liquid A – 25 mL weighs 22.3 grams. Liquid B 30 mL weighs 33.3 grams Liquid C 10 mL weighs 10.001 grams.
asked by Anonymous 
English
1. This isn't as cheap as any other sofa in this shop. 2. This is the most expensive soaf in this shop. 3. There are other sofas that are cheaper. (What does #1 mean, #1 or #2?)
asked by rfvv 
Physics
3. The mortar shell was short and you cannot change the explosive charge. You determine that a horizontal velocity of 1,592 feet per second will put the mortar shell. What angle should the mortar be elevated to?
asked by Jazz 
mircoeconomics
The firm currently uses 50,000 workers to produce 200,000 units of output per day. The daily wage per worker is $80, and the price of the firm’s output is $25. The cost of other variable inputs is $400,000 per day
asked by brynda 
s.d
name the substance witch is insoluble in water is added to dilute hydrochloric acid a colourless gas is evolved?
asked by ashok 
Economics
Assume that there is a perfect competition market for a good X. If one supplier all of a sudden wins the lottery and buys all the other firms that make good X and turns this market into a monopoly. Describe to me the difference in price and total output
asked by Helen 
English
I forgot to include these last sentences. Thank you. 1) What does the world outside her window remind Eveline of?/ OR make her think about? (both possible?) 2) Eveline and the other children used to play and shelter by vigilance against her father, who
asked by Henry2 
maths
2. The tangent to the curve y = ex2 drawn at the point (e, ee) intersects the line joining the points (e  1, ee1) and (e+1, ee+1) 3. A hyperbola, having the transverse axis of length 4 sin, is confocal with the ellipse 3x2 + 4y2 =12. Then its equation is
asked by shailja 
English
Can you change the sentence in below from passive to active sentence? Nearly crying,her little sister wanted to be left to herself.Please change to active sentence.So I will understand and concentrate well
asked by Bayarbold 
English
I just have a few more questions to you. As for 1) I just want to know if punctuation is correct and if distinguish is followed by "among" or not. In 3) I just want to know if "and" is needed. In 2) and 4) I'd like you to check the word choice. 1) The
asked by Henry2 
Business Math 205
Zuck M. Drye Bank is paying 12% interest compounded monthly.How much will $200 deposited at the end of each month be worth after 3 years?
asked by James 
English
In your previous post you wrote that this sentence was correct. 1) In the poem, "Daffodils", the flowers are presented, not as statically as in a painting, but alive with motion. Do you think I should omit "as"?
asked by Henry2 
biology
Which has more redox energy Lysine or Tryptophan? I was thinking Lysine because it has a long chain CH and CC bonds but trypyophan has a cyclic structure that also have lots of CC and CH bonds. Please help!
asked by Kay 
algebra
for the equation 6x+7y6=0 what is the ordered pair
asked by sally 
science
what happens to the rate of photosynthesis if stomata get blocked due to dust
asked by harishma 
physics
A small plane starts down the runway with acceleration 7.4 .if the force provided by its engine is 1.5×104 , what is the plane's mass?
asked by Anonymous 
geometry
In the equation y = 3x − 4, the __________.
asked by randy 
business math 205
Calculate the future ANNUITIES DUE. Round to the nearest cent when necessary. Annunity Payment:($3,000)Payment Frequency: Every (6) months Time Period Yrs: (5) Nominal Rate%: (10)Interest Compounded: Semiannually Future Value Of The Aunnuity Is What?
asked by James 
algebra
Calculate the pH of a sample of acid rain that has the H30t concentration of 3.0x45m
asked by Michelle 
health
What action makes the sound of the heart beating? Answer : lab dub .Is it right?
asked by joy 
Business Math 205
Calculate the PRESENT VALUE ANNUNITIES. Round to the nearest cent when necessary. Annunity Payment:$500 Payment Frequency:(Every 3 months)Time Period YRS:(2)Nominal Rate%:(16)Interest Compounded:(Quarterly) Present Value Of The Annuity is What?
asked by James 
chemistry
if 10 grams of metal A changes the temperature of 10 grams of water from 21 C to 24 C and 10 grams of metal B changes the temperature of 10 grams of water from 22 C to 29 C, which metal has the lowest specific heat?
asked by Anonymous 
chemistry
If Liquid A and Liquid B don’t mix, what would you guess about the liquids?
asked by g 
physics...........
What is the probability that the bulb is glowing for a circuit set up as: (Bulb)     (Voltage)      (Switch1)(Switch2)
asked by PHYSICS 
math
1. Let α, β be the roots of the equation x2  px + r = 0 and α/2, 2β be the roots of the equation x2  qx + r = 0. Then the value of r is ?
asked by shailja 
English
I know that.For example: I wash a car.In these sentence,subject is "I" and object is "car". But we will change this sentence to passive sentence,then it forms "A car is washed by me".So in this case,a car is the subject and me is the object now.Is it
asked by Bayarbold 
English
1.I wash a car.(Active) 2.A car is washed by me. In sentence #2,"a car" is the subject and "me" is the object.Is it right?My teacher taught me passive sentence.But It didn't match the passive structure.
asked by Bayarbold 
health
What action makes the sound of the heart beating?
asked by joy 
Maths 132
Find the volume of the solid lying in side both the sphere bounded x^2+y^2+z^2=4a^2 and the cylinder x^2+y^2=2ay
asked by Bir 
Psychology
If motivation consist only of drivereduction, what is the perfect state of a human being? a. Competitive,hard driving b. Not hungry or thirsty,no pain,absence of fear c. Constant change,always reestablish homeostasis d. Gradual movement from primary to
asked by MaS 
Geography
What were the factors that played a significant role in the collapse of Russian control over Eastern Europe? My Answer: A main factor that played a significant role in the collapse of Russian control over Eastern Europe was a widespread hatred of a corrupt
asked by Chandler 
college
Do a factory in the world for the recovery or production of ZnO using ammonium carbonate
asked by arash akbary 
ETH/125
I am trouble with my second assignment for week 7. I just can not understand exactly what I should be researching?
asked by Debbie 
chemistry
If I measure a graduated cylinder 50 mL and then take that same liquid and it measures 52 mL in a beaker, what is the percentage error of the beaker?
asked by Anonymous 
English
In passive form object becomes a subject.Is it right? So why is John is the subject in"John was chosen captain of the team".Isn't John is a object?I don't understand.Please explain it
asked by Bayarbold 
physics
Using your knowledge of the concept of inertia and Newton’s three laws of motion, recount what happens to: a) cars and b) passenger from the moment the car starts to slow down until it is brought to rest by a collision with a solid object.
asked by kashish khatri 
anthropology
Australopithecines –why the variety and who were they
asked by ami 
chemistry
A 55yearold woman visits a popular eatery for lunch. She orders a cheese and bacon pizza with extra cheese and has about 3 large glasses of cola (ph value 3). On the way back home, she experiences heartburn and abdominal pain, and has difficulty
asked by mema 
chemistry
If there are 35 drops in 1 mL, how many microliters are there per drop?
asked by Anonymous 
chemistry
If there are 35 drops in 1 mL, how many microliters are there per drop?
asked by g 
Science
Name the TWO variables in the following hypothesis... Homeless women are subjected to more spousal abuse than are housed women.
asked by Caitlin 
English
Thank you. A few more things. I'd like you to check the word choice. 1)It is necessary to distinguish among three kinds of interior monologue. In the indirect interior monologue the narrator never lets the character’s flow of thoughts be without control,
asked by Henry2 
english
make the spelling from these word delinquent we pitched the blank and prepared to sleep there
asked by dhruv 
English
1. This computer is such a slow thing that I can't use it. 2. This computer is such a slow thing that i can't use. (Which one is correct?) 3.This computer is so slow that I can't use it. 4. This computer is so slow that I can't use. (Which one is correct?
asked by rfvv 
English
What is the object of preposition in English grammar? What is its grammar explanation?How different between object and object of preposition?
asked by Bayarbold 
Business Math 205
The Stockton Bears Baseball Club Deposits $6,000 at the BEGINNING of each 3month period for 6 years in an account paying 8% interest compounded quarterly. How much will be in the account at the end of the 6year period?
asked by James 
Physical Science
the planet Jupiter is more than 300 as massive as earth. But a body would scarecly weighs 3 times as much on the surface of Jupiteras it would on the surface of the earth. Can you think of an explanation for why this is so?
asked by Traci 
need help
the chinese philosopher xunzi wrot that if a person attempted to cure rheumatism by beating a drum and sacrificing i pig to the gods,then the
asked by Anonymous 
computers
name 6 application packages including a package that can be used to teach accounting
asked by wadzanai