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September 20, 2014

Posts by John


Total # Posts: 6,242

science
so it would most definitely have to be 5. microorganisms. final answer! lol
May 30, 2011

science
if removed from the life cycle, which of the following would have the greatest impact on the productivity of lawns. 1. robins 2. moles 3. toadstools 4. dandelions 5. microrganisms i think 4 b/c of the seedd that are easily blown away in the wind to regerminate
May 30, 2011

Math 100p
78 students 10 of them are freshmen what fraction of the class are freshman
May 28, 2011

maths
the price of meat increase from 110 to159 what percentage increase
May 28, 2011

trig
sec(90degrees -theta)
May 27, 2011

Science
A researcher is gathering data from four geographical areas designated: South=1;North=2; East=3; West=4. The geographical regions represents a. categorical data b. quantitative data c. directional data d. either quantitative or categorical data
May 27, 2011

business
180 Flip - a 180 degree boardslide varial kickflip 360 Flip – A 360 degree boardslide varial kickflip 50-50 – both trucks grinding on an object 5-0 – only the back truck grinding on an object Backside – turns or rotations in the direction your toes point ...
May 27, 2011

chemistry
A furnace that provides heat by burning methane gas must have the correct mixture of air and fuel to operate efficiently. What is the mole ratio of air to methane gas in the combustion of methane? Hint: Air is 20% oxygen.
May 27, 2011

chemistry
If the gas could took a hemispherical shape, what circular surface area would the gas cover? chemistry
May 26, 2011

Chemistry
phosgene an equilibrium reaction is the formation of phosgene an equilibrium reaction? how can you tell
May 25, 2011

Pre-algebra
Yes
May 25, 2011

science
IN SOLID LIQUID WHAT DO NOT MATTER
May 21, 2011

math
factor the following trinomail w^18-9w^9y^5+14y^10
May 18, 2011

physics
A particle moves along the x axis. It is initially at the position 0.280 m, moving with velocity 0.080 m/s and acceleration -0.240 m/s2. Suppose it moves with constant acceleration for 3.10 s. (a) Find the position of the particle after this time. (b) Find its velocity at the ...
May 18, 2011

geometry
please help me?
May 17, 2011

geometry
how long are the congruent legs of isosceles triangle if its base and altitude to the base are 12cm and 8 cm respectively?
May 17, 2011

math
thanks
May 17, 2011

math
square root of 80?
May 17, 2011

Calculus
An isosceles triangle has perimeter 64m. Find the dimensions of this triangle that make its area a maximum
May 17, 2011

chem
what is the total mass of rn-222 remaining in an original 160g sample after 19.1 days? 1 2.5g 2 5.0 g 3 10g 4 20g how do you do this ?
May 16, 2011

math
Explain why the equation y=x squared can have two possible values of x for every value of y.
May 16, 2011

math
What would the future value of $6.5million dollars be after 5 years at 1.2% interest?
May 16, 2011

Cost Analysis
Does indirect costs often depend on some or all of the direct costs? How do we make that call.
May 16, 2011

Physics
i . imgur . com/Ki7wM.jpg
May 16, 2011

Physics
That's still not right but hopefully you can understand it. I wish it would just let me post a link to an image.
May 16, 2011

Physics
Figure: ---------______ -----___|------| F-->|-m-|--M---| ----|___|------| --------|______|
May 16, 2011

Physics
The two blocks in the figure, of mass m and M respectively, are not attached, but there is a coefficient of static friction u between them. The surface below the heavier block M is frictionless. What is the minimum force magnitude F required to keep the smaller block m from ...
May 16, 2011

Body Structure and Function
The change in the number of olfactory neurons as we age increase the detection of warning smells
May 15, 2011

physic
A Carnot engine takes an amount of heat QH = 113 J from a high-temperature reservoir at temperature TH = 1170°C, and exhausts the remaining heat into a low-temperature reservoir at TL = 13.3°C. Find the amount of work that is obtained from this process
May 13, 2011

physic
Find the net change in entropy when 259 g of water at 0.0°C is added to 259 g of water at 97.5°C.
May 13, 2011

Astronomy
Which of the following developments was most directly responsible for the creation of rockets that were capable of going to the moon? A. gunpowder B. explosives C. single-stage rockets D. multistage rockets
May 13, 2011

Physics
I've tried a bunch, have no idea. Got the first part, no idea on the second one. A basketball, of mass m = 0.45 kg is dropped, from rest, from a stationary hellicopter at a high altitude. Use g = 9.81 N/kg. (a) If air resistance is negligible, using energy considerations ...
May 12, 2011

CALCULUS HELP PLEASE!!
Intergral from -2 to 2 (-2 is at the bottom of the integral sign and 2 is at the top) x^-2dx = -x^-1] (the bracket has a 2 at the top and -2 at the bottom) = -(2)^-1-(-(-2)^-1) = (-1/2)-(1/2) = -1 Is this true or false. I think it's false, but can someone explain to me why...
May 11, 2011

Calculus
Intergral from -2 to 2 (-2 is at the bottom of the integral sign and 2 is at the top) x^-2dx = -x^-1] (the bracket has a 2 at the top and -2 at the bottom) = -(2)^-1-(-(-2)^-1) = (-1/2)-(1/2 = -1 Is this true or false. I think it's false, but can someone explain to me why ...
May 11, 2011

MATH
How do you factor (x^2)+x+7?
May 10, 2011

keyboarding and word processing
When creating a 20-page newsletter in which you want different margin settings and other page formats within the multipage document, which one of the following Word features should you use?
May 10, 2011

Chemistry
The smaller molecules that make up complex carbohydrates are called A. sugars B. amino acids C. fatty acids D. nucleotides
May 10, 2011

statistics
A consumer group is testing a manufacturer’s claim that a new car model will travel at least 30 miles per gallon of gasoline. Assume that ��0:��=30 and ����:��<30, and that the population standard ...
May 9, 2011

statistics
what the error is: a) Grade Percent Frequency A 20% B 45% C 30% D 10% F 5% (b) The following table summarizes the grade breakdown on an exam in a small statistics class with 10 students. Grade Percent Frequency A 30% B 35% C 15% D 20% F 0%
May 9, 2011

statistics
Washington University banned smoking on the Hilltop campus starting in 2010. The student paper decides to do an opinion poll to see if current campus students/faculty/staff support the ban. Reporters are about to start asking a sample of 250 Hilltop people for their opinions...
May 9, 2011

engineering
How is bacteria used in genetic engineering?
May 8, 2011

physics-nuclear reactors
this sso guy is nuts if he thinks we should be able to do this...
May 8, 2011

Physical science
Calculate the total number of ions in 2,0g K2SO4
May 7, 2011

math
according to what rule are the numbers arrange 8-9-7-10-12-20-28-29?
May 7, 2011

logos
Search "amazing logos" in a search engine like Google.
May 6, 2011

Math
Integrate[[E^(y/x),{y,0,1},{x,y,1}] Solution:0.859141 or .5*(e-1) I can't figure out what to do,and I tried substitution.
May 6, 2011

Chemistry
A quantity of sulfuric acid is added to 100. mL of water. The final volume of the solution is 111 mL and has a density of 1.14 g/mL. What mass of acid was added? Assume the density of the water is 1.00 g/mL.
May 6, 2011

Poetry
No thats my sister...we both suck at poety:( we are in the same class
May 4, 2011

Poetry
I need a seven long line iambic pentameter poem describing something. It can be anything. PLEASE HELP...I have no idea how to do this and my teacher will fail me. please please help
May 4, 2011

Poetry
Hang out with friends. I think I want my poem describing love. I came up with this one but its not in iambic pentameter form what so ever. and I have no clue how to change it Love, unconditional, unbreakable, unmistakable . A beating within your heart unstoppable. The ...
May 4, 2011

chemistry
Oh yeah! Thanks, so you would substitute: (10)(100) = (3)(x) to get: x = 333.33 mL, right?
May 3, 2011

chemistry
I need help with this problem: if you want to reduce the strength of 100 mL of 10 N NaOH to 3N, how much water would you need to add? Thanks in advance.
May 3, 2011

Physics
m = .150kg v = 40m/s Theta = 30 degrees Vh = 40*cos(30)>>>>Vh = 34.64m/s KE = (1/2)(.150kg)(34.64)^2>>>>KE = 90J
May 3, 2011

Physics
asdfadsf
May 3, 2011

ECONOMICS
Two price setting firms have the same price and marginal revenue functions but face different cost functions. These functions are provided below. P = 165 - 0.025Q MR = 165 - 0.05Q Firm 1: TC = 4,000 + 15Q Firm 2: TC = 3,000 + 22Q a. Assuming that both firms are profit-...
May 3, 2011

Biology
What ethical issues might arise when a drug company funds trials of a new drug it has developed to treat a genetic disorder?
May 3, 2011

Chemistry
The alkanes mostly have dispersion forces acting among them,,so CH4 is dispersion forces as well as for c3h8 and c2h5 is ethyl which likean alkane..
May 2, 2011

8th grade math
3.5 X 10 ________ 7 x 10^-9
May 1, 2011

physics
You are driving your race car around a circular test track. Which would have a greater effect on the magnitude of your acceleration, doubling your speed or moving to a track with half the radius? Why
May 1, 2011

Algebra
What is the number of units in the distance from the origin to the point (-8,6) in a coordinate system?
May 1, 2011

calculus
Please help find the solution to the initial value problem dy/dx=(1+2cos^2 x)/y with(y>0), and y=1 when x=0. Thanks.
April 29, 2011

Algebra
find the LCM of 6y^6and 12y^8
April 26, 2011

Sociology
Which sociological perspective holds the view that people create their social worlds through interaction and manipulation of symbols?
April 23, 2011

CRIMINOLOGY
In what areas should the federal authorities not become involved?
April 23, 2011

Chemistry
An aqueous solution of an unknown compound boils at 101.00 degrees Celsius (760 torr). What is the molality, and freezing point of this solution?
April 21, 2011

social studies
where is antigua volcano
April 19, 2011

statistics
) Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of an illness such as gout, leukemia, or lymphoma. Over a period of months, an adult male patient has taken eight blood tests for uric acid. His mean ...
April 18, 2011

Chemistry
You are in the silver recovery business. You receive 55‐gal drums of waste silver solution from photography laboratories, metal plating operations, and other industrial companies. Currently, you have a drum of waste from a silver‐plating factory with the silver ...
April 18, 2011

literature
Why the Nurse is eager for Paris to marry Juliet?
April 18, 2011

Chemistry
Ammonium sulfate reacts with a solution of sodium hydroxide to produce sodium sulfate, ammonia gas and water. Calculate the yield in grams of ammonia gas that would form; and the amount of excess reagent in grams that would be left in the flask, after 9.92 grams of ammonium ...
April 17, 2011

physics
A 10-kg object is falling vertically through moist air. If its acceleration is observed to be 6 m/s/s, what is the resistance in newtons offered by the air?
April 17, 2011

trig
Peter (P) and Jamie(J) have computer factories that are 132 miles apart. They both ship their completed parts to Diane (D). Diane is 72 miles from Peter and 84 miles from Jamie. Using the points D,J,and P to form a triangle, find m<PDJ to the nearest tenth of a degree.
April 16, 2011

reading
working on a crosword puzzle it has 9 letter and the words given are watermark; paper;________;person help please
April 14, 2011

reading
crossword puzzle 9 letters words given watermark;paper::________;person
April 14, 2011

reading
crossword puzzle 6 letters words given square;perpendicular;:triangle;________
April 14, 2011

reading
working on a crossword puzzle it has 8 letters and the words are grammer;______;:scale;music
April 14, 2011

Math
compound and interest Using the below values please calculate the amount accumulated (future value) *Initial principal=$2000 *Interest Rate=9% *Number of years 7 *Monthly compounding
April 14, 2011

Math
More detils plese..
April 13, 2011

Math
compound and interest Using the below values please calculate the amount accumulated (future value) *Initial principal=$2000 *Interest Rate=9% *Number of years 7 *Monthly compounding
April 13, 2011

math 234 calc 4 !!!!!!!!!!!
write this function in terms of heaviside functions, and then show your work in finding its laplace transform f(t)= o if o < t<3 t-3 if 3lessthan or equal <lessthan or equal to t < 6 o if 6< t < infinity
April 12, 2011

MATH !!!!!!!!! HELP
Find the exact value (either decimal or fraction form) of the first term of an arithmetic sequence if the sum of the first 100 terms is 7099.5 and the sum of the next 100 terms is 20799.
April 12, 2011

Math
ten pounds of potatoes cost $2.55. How much will 6 pounds cost? Write and solve a proportion. Justify your steps.
April 12, 2011

physics
In an experiment to determine the rate at which heat is extracted from a hot material, 305 g of the material at 90 °C is put into a 50 mm diameter copper vessel to a depth of 90 mm as shown below. The hot material and calorimeter are placed in a container holding 189 g of ...
April 12, 2011

sarah
In an experiment to determine the rate at which heat is extracted from a hot material, 305 g of the material at 90 °C is put into a 50 mm diameter copper vessel to a depth of 90 mm as shown below. The hot material and calorimeter are placed in a container holding 189 g of ...
April 12, 2011

physics
In an experiment to determine the rate at which heat is extracted from a hot material, material at 90 °C is put into a copper vessel. The hot material and calorimeter are placed in a container holding cold water at 22.7 °C. The temperature of the water is then measured...
April 12, 2011

physics
In an experiment to determine the rate at which heat is extracted from a hot material, 305 g of the material at 90 °C is put into a 50 mm diameter copper vessel to a depth of 90 mm as shown below. The hot material and calorimeter are placed in a container holding 189 g of ...
April 12, 2011

chemistry
A gas has a volume of V1 = 550 mL. If the temperature is held constant, what volume would the gas occupy if P2 = 22 P1?
April 11, 2011

Lotto 5/90 maths
how can i get the next number of lotto
April 11, 2011

physics
You throw a ball straight up in the air. The instant after leaving your hand the ball’s speed is 30 m/s. Ignoring the effects of air resistance, predict how fast the ball is traveling 2 seconds later? Where is it at this time?
April 10, 2011

physics
In Fig. 12-39, a climber with a weight of 441 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are θ = 45˚ and φ = 25˚. If her ...
April 8, 2011

Finance
(Break-even analysis) Acquiring more energy-efficient equipment would cost $80,000 now and yield savings of $20,000 in energy costs every year for the next 8 years, after which its salvage value will be 0. The discount rate is 8%. (1) Based on a before-tax analysis, what is ...
April 8, 2011

physics
Two particles, each of mass 6.00 kg and speed 4.67 m/s, travel in opposite directions along parallel lines separated by a distance 4.89 m. What is the magnitude of L, the angular momentum of the two-particle system around a point midway between the two lines?
April 7, 2011

physics
a climber with a weight of 441 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are θ = 45˚ and φ = 25˚. If her feet are on the ...
April 7, 2011

chemistry
Cobalt-60 is radioactive isotope used to treat cancers. A gamma ray photon emitted by this isotope has an energy of 2.13 x 10—13 J. What is the wavelength of this gamma ray in SI unit?
April 7, 2011

Chemistry
Tooth enamel is made up of hydroxyapatite, Ca_10(PO_4)_6(OH)_2 or the empirical formula, Ca_5(PO_4)_3(OH). Use the empirical formula for all calculations because stoichiometry plays two significant roles. A. Print the balanced chemical equation for the molar solubility of ...
April 7, 2011

chemistry
The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the amount of sold NaF that is required toprepare a 250. mL acidic buffer with pH = 2.75. The inital molarity of hydroflouric acid is .250M but you have only 75mL. Part 2 Recalculate the pH of the buffer prepared in...
April 6, 2011

physics
How does pressure work as a restoring force to create a sound wave?
April 6, 2011

Math
$50.40
April 6, 2011

algebra 2
what is 7^1/2 divided by 7^3/5
April 6, 2011

algebra 2
what is 7^1/2 divided by 7^3/5
April 6, 2011

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