Posts by Steven

Total # Posts: 586

Essay evaluation
Please grade my GMAT essay on 6 The author of the statement believes that the century old practice of using money in its physical form should be replaced by electronic accounts of credits and debits. Some people may argue that this practice is elitist and people of the lower ...

Analysis of Argument
Thank you for your help! :) Im not a native english speaker and havent written an essay . I would really like some inputs. :)

Analysis of Argument
Question: “According to a recent study, professional bodybuilders who used Train & Gain, a new protein supplement, over the course of three months experienced an increase in measured strength of up to 20%. Since Train & Gain is now available without prescription at all ...

GMAT Essay- Analysis of issue
In what ways can i improve this? more examples?

GMAT Essay- Analysis of issue
Please grade my essay on 6 Topic “Parents should not shoulder the full burden of their children’s college tuition. If university students are required to pay for at least a portion of their education, they will take their studies more seriously and, ultimately, ...

GMAT Essay
Thank you for your inputs :)

GMAT Essay
Hey All, Please rate my GMAT essay out of 6. The topic is “Of all the manifestations of power, restraint in the use of that power impresses people most.” Explain what you think this quotation means and discuss the extent to which you agree or disagree with it. ...

Biology
Need a more detailed picture of the sheep's pluck...lungs, trachea, and heart.

Biology2
Could you possibly give me a link to a more detailed picture? For example one that outlines each lobe and depicts more of the internal anatomy of the sheep's lung.

Biology
Where can a find a picture of a sheep's lung with labeled parts?

science
what was the altitude in degrees of the moon on 3/18/11

chemistry
what is the entropy change that occurs when 500g of water ice melts at 0 degrees celsius and 1 atm. the heat of fusin for water ice under these conditions is 6.01 Kj/mol.

geometry
I have a isosceles trapezoid question. The top line is 13" long, the sides are 60" long, and the bottom is 27" long. I do not know what is the equation or formula is to determine the acute angle between the bottom and sides or top and sides. Can you please let ...

Chemistry
How many grams of CH3COOH are present in 2.5^3 of vinegar. Also, what is the formula needed to solve? Thanks!

Chemistry
How do I find how many grams of CH3COOH are present in cm^3 of vinegar? Also, how many moles of CH3COOH are present in 2.5 cm^3 of vinegar? Thanks!

math
A computer costs $799. To add memory it costs $25 for 8 megabytes. How much memory can you add if you have at most $1,000 to spend.

math
Last year's computer model is on sale for $799. You can add more memory to the computer. Each chip of 8 megabytes of memory costs $25. How many megabytes of memory can you add if you have at most $1,000 to spend.

math
Last year's computer model is on sale for $799. You can add more memory to the computer. Each chip of 8 megabytes of memory costs $25. How many megabytes of memory can you add if you have at most $1,000 to spend.

Math
Because all of the tickets were square!

geometry
if ac = 2x + 13 and db =4x - 1, what is db

Spanish -Please check 7th grade
Please check my answers-I have to say where I just came from and what I have done using forms of venir and acabar de The post office Vengo del correo. Acabo de mandar una carta. The museum Vengo del museo de arte. Acabo de mirar el arte. The hospital Vengo del hospital. Acabo...

Genetics
Hi, I really need help in how to approach this question: A species of tiny antelope, known as the zephyr, has an XY system of sex determination, similar to mammals. Zephyr males have small antlers and females do not. The antlers can be two pronged (2-pr) or three pronged (3-pr...

Math
A computer costs $799. To add memory it costs $25 for 8 megabytes. How much memory can you add if you have at most $1,000 to spend.

chemistry
The pH of a solution is 6.0. Explain how the addition of the following substance would alter (or not alter) the pH of the solution. a. HCl b. NaOH c. H20

Science
The law of conservation of energy states that energy can neither be created nor destroyed. In many instances it may look as though energy is gained or lost, but it is really only changed in form. How is the law of conservation of energy represented when an archer shoots an ...

Physics
For Part B, do (340+200)/2=270 rpm to find the average rpm during acceleration. Then divide this answer by 60 seconds to find the average revolutions per second during acceleration 270/60=4.5 rev/sec. Multiply this answer by the amount of seconds it takes for it to accelerate ...

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.

Math
how long does it take for a deposit of $1400 to double at 7% compounded continously it would be awesome if you could also tell me how to do it...

calculus
a) -2(x/r) b) Negative c) 2(4.29 / 6400) * 100

physics
Can you figure it out now?

physics
Velocity is a vector quantity, meaning it has both magnitude and direction. Acceleration is the rate of the change of velocity. Therefore, if the speed changes, the object is accelerating (whether it speeds up or slows down). ALSO- if the object is changing direction, the ...

Physics
For this problem, ignore air resistance. You are to fire a rifle that shoots a particular bullet at 460 m/s at a target that is 45.7 m away and level with the rifle. Assuming that the acceleration due to gravity is 9.80 m/s², how high above the target must the barrel of ...

physics
Kinematics Equations: Vx1 = Vx0 + axΔt (Vx1)^2 = (Vx0)^2 + 2axΔx Δx = Vx0Δt + ½ ax(Δt^2) Using the second kinematics equation, we can solve for Δx. (Vx1)^2 = (Vx0)^2 + 2axΔx Plug in what you know: (45 m/s)^2 = (0 m/s) + 2(9.8m/s^2)(? m...

science physics
The speed at which the two objects are approaching each other (from the trains' perspective) is 95 km/h (x 2) = 190 km/h. If they are 7.5 km apart at first, you can set up a proportion: 190 km 7.5 km ------ = --------- 1 hr x hr Cross-multiply the terms and set them equal ...

Physics
For this problem, ignore air resistance. You are to fire a rifle that shoots a particular bullet at 460 m/s at a target that is 45.7 m away and level with the rifle. Assuming that the acceleration due to gravity is 9.80 m/s², how high above the target must the barrel of ...

Physics
I would like to forget the upward component, as the object IS in fact a bullet fired at a fast velocity from a gun towards a target not too far away. However, we're graded on the correctness of our problem solving. And, additionally, this factor WOULD become an issue if we...

Physics
That's not entirely correct... That would only be true if the rifle was fired horizontally, giving the x component 460 m/s towards the target. However, that 460 m/s has some UPWARD y component too, reducing the x component by some amount... Thanks, Steven

Physics
For this problem, ignore air resistance. You are to fire a rifle that shoots a particular bullet at 460 m/s at a target that is 45.7 m away and level with the rifle. Assuming that the acceleration due to gravity is 9.80 m/s², how high above the target must the barrel of ...

Physics
Kinematics Equations: Vx1 = Vx0 + axΔt (Vx1)^2 = (Vx0)^2 + 2axΔx Δx = Vx0Δt + ½ ax(Δt^2) Had the distance from the intersection when braking begins not been given: Remaining distance = 140.0 m Current Velocity = 14.8 m/s Reaction time = 0.440 s ...

science
what is the definition of a compound machine?

physics
A 55 kg student traveling in a car with a constant velocity has a kinetic energy of 1.6 104 J. What is the speedometer reading of the car in km/h?

Math
distance problem suzi drove home at 60mph,but her brother jim,who left at the same time, could drive at only 48mph. When suzie arrived, jim still had 60 miles to go. How far did suzi drive?

MATH
2 tens 5 hundreds

chemistry
?*

chemistry
Why is the energy for high 2/5 of the energy for the low.

Math
a walk up a hill starts at a car park on the 100m contour and climbs steadily to a summet at 240m. on a map with scale 1:25000 the distance along the path from the car park to the summet is 9.6cm. how long it will to reach su,,it and back according to Naismith's rule.

statistics
A canidatate for governor of a certain state claims to be favored by at least half of the voters. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis? A. There is not sufficient evidence to reject the claim > or = 0.5 B. ...

ALGEBRA
auren and Andrew left Austin at the same time. Lauren traveled east at an average speed of 50 miles per hour. Andrew traveled west at an average speed of 65 miles per hour. How many hours of driving does it take for the two to be at least 500 miles apart? Write an inequality ...

Algebra
An elevator went to the do of a 180m building, stayed for 1 minute, then came down. The total time was 3.5 minutes. If the speed of the elevator when it went up was 1 m/sec less than when it came down, find both speeds (up and down).

Algebra
Thhe members of a soccer team are to share the $540 cost of a banquet. When 5 students are unable to attend the cost per student was $1.50 greater. How many students attended the banquet?

algebra
One paving machine can surface 1 km of highway in 6 hours. Another can surface 1 km of highway in 8 hours. how long would it take to surface 1 km of highway with the two machines working together?

physics
A 100 kg mass starts from rest at the top of an incline plane that makes an angle of 35 degrees with the horizontal. There is a coefficient of friction of 0.005 between the ramp and the mass. The mass slides down the ramp and then slides to a stop on a surface that the ...

physics
A 29 g ice cube at 0.0°C is added to 110 g of water in a 62 g iron cup. The cup and the water have an initial temperature of 25°C. (a) Find the equilibrium temperature of the cup and its contents. i don't understand how the iron cup changes the situation. please help.

psychology
Sexual arousal in human begins is different from that of other animals. It is clear that human sexual arousal can occur:

algebra 1
can u please help me figure out the estimated talk time of 250minutes

statistics
we developed a 95% z confidence interval for the mean BMI of women aged 20 to 29 years, based on a national random sample of 654 such women. we assumed there that the population standard deviation was known to be 7.5. in fact the sample data had mean BMI of 26.8 and standard ...

statistics
at the census bureau web site you can find the percent of adults in each state who have at least a bachelors degree. it makes no sense to find the mean for these data and use it to get a confidence interval for the mean percent U in all 50 states. Why not?

statistics
if young men thought that their own level of muscle was about what women prefer, the mean "muscle gap" in the study would be 0. we suspect that young men think women prefer more muscle than they themselves have. a)what is the value of he test statistic Z? b)you can ...

penniman
what is the estimate quotient for 233 divided by 6?

chemistry
identify the atoms that are being oxidized and reduced.. 2FeCl3 + 2KI --> 2FeCl2 + 2KCl + I2

statistics
in a test for esp a subject is told that cards the experimenter can see but he cannot contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has ...

statistics
a binomial distribution will be approximately correct as a model for one of these two sports settings and for the other. explain why by briefly discussing both settings. a)a national football league kicker has made 80% of his field goal attempts in the past. this season he ...

statistics
slot machines are now video games, with outcomes determined by random number generations. in the old days, slot machines were like this: you pull the lever to spin 3 wheels; each wheel has 20 symbols, all equally likely to show when the wheel stops spinning; the three wheels ...

stats
slot machines are now video games, with outcomes determined by random number generations. in the old days, slot machines were like this: you pull the lever to spin 3 wheels; each wheel has 20 symbols, all equally likely to show when the wheel stops spinning; the three wheels ...

stats
you have torn a tendon and are facing surgery to repair it. the surgeon explains the risk to you: infection occurs 3% of such operations, the repair fails in 14%, and both infection and failure occur together in 1%. what percent of these operations succeed and are free from ...

math
So would the ordered pair be (1,4)?

math
Solve using elimination method x+5y=21 -x+5y=19

math of investment
Jane will win at least $5

Chemistry
Copper(II) chloride and lead(II) nitrate react in aqueous solutions by double replacement. Write the balanced chemical equation, the over all ionic equation, and the net ionic equation for this reaction. If 16.06g of copper(II) chloride react, what is the maximum amount of ...

chemistry
What volume of 0.123 M K3PO4 is required to react with 60 mL of 0.862 M MgCl2 according to the equation 2K3PO4+3MgCl2--> Mg3(PO4)2+6KCl Answer in units of mL.

physcis
23meters

How can blood type A donate to AB???
I know my reasoning is flawed but I just can't figure out in what sense is it flawed. once again, if I apply my logic... type O has no antigens and A and B antibodies. IF you donate type O to type A, B, or AB, it wouldn't work! cuz the A and B antibodies from type O ...

How can blood type A donate to AB???
From my understanding, blood type A has A antigens and B antibodies. Blood type AB has A and B antigens and no antibodies. If someone donates type A to type AB, wouldn't the antibody B from type A attack the antigens B from AB??? I know I am looking at this incorrectly but...

Propagation of error and sig. figs
To summarize my messy post, I am unsure how to write my final answer

Propagation of error and sig. figs
I'm really embarrassed to ask this! I knew how to do it before but I forgot after 2 years. I remember learning it for analytical chemistry :( So a basic problem: What is x= a+b+c? given that: a= 100.7 +/- 0.05 b= 0.61 +/- 0.005 c=226 +/- 0.5 OK. My question is the ...

english
What nursery rhyme character was a "wise galoshes wearing feline" answer has 12 letters.

4th grade
What is matter made up of?

science
Does lighting occur when charges jump between the thunder cloud and the positive ground as a discharge?

Science
Is discharge of static electricity from a huge cloud called a thundercloud?

4th grade
Is all matter made up of tiny particles too small to see

math
if the altitude of a triangle is doubled and the base is multiplied by 3,what is the effect on the area?

accounting
You are provided with the following transactions that took place during a recent fiscal year. Complete the table indicating whether each item (1) should be reported as an operating (O) activity, investing (I) activity, financing (F) activity, or as a noncash (NC) transaction ...

Calculus
Suppose a cylindrical can is manufactured with radius r. The manufacturing process makes the length r imprecise; r can be off by ±0.03 cm. The manufacturing process makes the height of the can precisely equal to three times the radius r (including any error in r, but ...

algebra
72 students is 90% of how many students

math
Find the percent using the percent proportion 75 rolls is what percent of 1000 rolls

math
Identify the percent,whole , and part in the following 30% of 730 is 219 do not solve for any unknowns Percent= Whole= Part=

math
A michigan orchard made 11,491lb of taffy apples with approximately 1lb of taffy mixture for each 76.7 pounds of apples. To the nearest tenth of a pound, how many pounds of apples and how many pounds of taffy were used

MO theory regarding heteronuclear diatomic molecul
Hi all I am having trouble finding the MO order for heteronuclear diatomic molecules: In my textbook, heteronuclear order is listed as: 1o 2o 3o 4o 1pi 5o 2pi 6o where o = sigma When I first saw it, I was confused; how can the above be correct? If one were to calculate bond ...

11th grade chemistry
how many molecules do you have in 64g of CO?

Term symbols for ground states
Dr Bob, Thank you so much!! You have taught me something in mere minutes that my professor failed to do in a single lecture. And thank you again for the web site. I had no idea such a site existed! I wish there was a karma/rep system :) thanks again

Term symbols for ground states
OHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH. if it was 8e- in d orbitals (5 of em) it would be +2 +1 0 -1 -2 for up spin , then +2 +1 and 0 for down spin! therefore, total is 3 and L=3!!!! I hope this is correct!

Term symbols for ground states
Thank you Dr Bob. Yes, I am seriously confusing myself haha As far as the 4d8 is concerned, I was referring to Ni2+ it has 8 electrons it occupies 2, 1, 0, -1, -2 so would that make L = 0 which is S? Sorry for the confusion. I greatly appreciate you staying and helping me ...

Term symbols for ground states
what about Nb2+ then? it has 8 electrons it occupies 2, 1, 0, -1, -2 so would that make L = 0 which is S?

Term symbols for ground states
But for Nb2+ where it is 4d^3 Shouldn't L be D instead of F? Like p^2 in carbon, L = P And in s^2, L = S ------ Or am I going about this the wrong way?

Term symbols for ground states
You are correct DrBob. Error on my part.

Term symbols for ground states
I have having difficulty understanding where L comes from in term symbol notation For Carbon, e- configuration is 1s^2 2s^2 2p^2 p corresponds to l=1 overall spin is 3/2 since cell is less than half-full, J=S=3/2 so term symbol is 4 P (3/2) this i understand where P came from...

Quantum mechanics, eigenvalues, eigenfunctions
I'll also like to thank Dr. Physics for helping me last time :)

Quantum mechanics, eigenvalues, eigenfunctions
What exactly is an eigenvalue? "To be an eigenfunction, the operator has to reproduce the function with some multiplicative constant." Is the eigenvalue the multiplicative constant -or- is it the m constant and the function? Many thanks.

statistics
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour fight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps ...

Quantum mechanics, eigenfunctions!
Thank you! I thought I was going crazy because I wasn't able to an eigenfunction since 1st deriv. would be = cos(x)*e^(ax) + a*sin(x)*e^(ax) which is definitely not an eigenfunction of the operator.

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