Luke

This page lists questions and answers that were posted by visitors named Luke.

Questions

The following questions were asked by visitors named Luke.

When 1.0 mol of ammonia gas in injected into a o.50L flask, the following reaction proceeds to equilibrium. 2NH3 <--> N2 (g) + 3H2 (g) At equilibrium, 0.30 mol of hydrogen gas is present. a) calculate the equilibrium concentrations of N2 and Nh3. b) what...

Hi how would i solve this?? The equation of the cirlce is x^2+y^2-4x+2y=0. Determine the coordinates of the center and the radius of the circle. What do i do? anyone

what would x^2+y^2-4x+2y=0 (Equation for a cirlce) be in r^2=(x-h)^2(y-k)^2 form? tnx I will start you off... x^2+y^2-4x+2y=0 x^2-4x+y^2 +2y =0 x^2-4x+ 4 + y^2 +2y+ 4 =+ 4+ 4 (x^2-4x+ 4) + (y^2 +2y+ 4) =8

One of the countries in Central America uses Spanish as the official language of the country but also has 23 different Maya groups; each with its own dialect. What country is it?

Find the value of z. Then find GE and EH and state whether E is the midpoint of line GH. GH = z + 6. EH =2z-4. GE=z.

How do you divide a hexagon into 9 congruent parts?

Predict the sign of ( ∆H) in each of the following reactions: NH3 (g) + HCl (g) NH4Cl(s) ∆S = +, ∆G = - Fe (s) + Cu+2 (aq) Fe+2 (aq) + Cu(s) ∆S = +, ∆G = - Cl2 (g) + 2Na (s) 2NaCl (s) ∆S = +, ∆G = -

a person who studies and collects rocks for fun

A man is on his hands and knees looking for a £5 note he has dropped. His search for the fiver continues for some time. Finally in the corner of the room he finds it. What is the first thing he does? Anyone know this?????

For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) <===> PCl3(g) + Cl2(g) a) What is the sign of S° for the reaction? Explain. b) What change, if any, wi...

There is a long fence along the border of 2 mens property. 1 man is using the existing fence to make a cattle pen. He has 500 ft of fencing. Suppose the pen extends x ft away from the existing fence along the border. Find an expression for the area in ter...

first of all this is my first time so i don't know if i am doing it right. I need help i have holiday homework that i need to do but i cant find good enough info for question 1 and i don't understand how to do question 2 below i will write homework exactl...

Please faCtor. Thank you for your help. a^2 + 4a + 21

Can someone help me solve this and break it down step by step please??? [Sqrt(x-3)]-[Sqrt(x+2)]=3

I would really appreciate it someone helped me with this information. 1. Solve the inequality: |3 - 3x/4| >= 9 Solve for x 2.(x - 2)(x + 1) = 4 and factor completely 64 + a^3

How to get pure gold from impure gold..please specify the chemical equation.. any example is fine,e.g. AuCl3 -> Au

What experiment(apparatus can be made) can be used to determine the relationship between period and frequency of vibration?

Solving part of a part. How do you use thermometers to solve fraction problems?

I know its true but why? When you multiply a whole number by a whole number the result is a larger number. When you multiply fractions the result is a smaller number.

Three forces acting on an object are given by F1 = (-8.79i + 8.34j) N, F2 = (7.06i + -3.02j) N, and F3 = (-3.05i) N. The object experiences an acceleration of magnitude 2.26 m/s2. What are the components of the acceleration vector?

A fire helicopter carries a 615 kg bucket of water at the end of a cable 19.5 m long. As the aircraft flies back from a fire at a constant speed of 40.5 m/s, the cable makes an angle of 35.2o with respect to the vertical. Calculate the force of air resist...

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 23.0 degrees with the horizontal. A piece of luggage having...

Estimate the terminal speed of a wooden sphere (density 0.700 g/cm3) falling through air if its radius is 3.20 cm and its drag coefficient is 0.470.

If it takes 4.12 J of work to stretch a Hooke's law spring 12.1 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm.

A potential energy function for a two-dimensional force is of the form U = 2.46x3 y - 5.05x (which has units of J). Calculate the force that acts at the point (1.26 m,1.18 m).

in regard to the reverse freezing process of water(when it expands) and others molecules contract.. is it only water that does this or is it all the hydrogen bonded molecules?? ( N,O,F) NH3, H20 anf FH...my science teacher doesn't know the answer and i'd...

Why is it not possible to formulate a model that accurately represents reality

A building is the shape of an airplane hanger (a half cylinder). Construction for the foundation (rectangular part) costs $30 per square foot, the sides (semicircle bases) cost $20 per square foot and the roofing cost $15 per square foot. The volume of th...

Why have the people of West Africa started to work at the local level to help their economies?

exact value for tan(7pi/6 radians)

if f(x)=1-3x/2+x find an exact value of f(-1/2)

make f the subject of the formula: D=square root p/f-p

g is a linear function such that g(1)=7.5 and g(7)=12.6 Find the formula for g(x). I've tried doing it and the formula i got was: y = 0.9x + 6.6 is that correct?

Make f the subject of the formula D = √(p/f-p)

Identify 4 objects in the grocery store that hold lress than 10 milliters

solve the equation 5 - √x = 2x^2 - 3

if M = 3 x 6 ^ (-t) find the half life of M

find the amplitude and period of: 2 cos4x + 5 sin4x

I am trying to tell the difference between trade credit and opportunity costs, but now liking what I find on the internet. Is there a link that shows both? I could not find one. In order to do my assignment I need to compaire the two so I could figure out...

I have a data set for MLB teams. the assignment is to form a hypothesis based on the set. h0- Teams with higher attendance will have a better ERA h1- attendance will not effect the ERA Preform a 5 step hypothesis test and show work for z and t test. I am...

Does the size of a 1,5V cell(battery) affect the internal resistance of a circuit containing: 3 different size batteries,multimeter,connecting wire,a light bulb resistor.How do i set up this experiment.I'm really lost, please help. Thank you in advance

Hey i need some assistance with translating this sentence thanks. Urbs Troja dicitur decem annos a Graecis oppugnata esse. thanks again

What do you think was Lance Armstrongs purpose in writing his book Its Not About The Bike?

Find (A ¿ B) ¿ C, given A = {s, e, t}, B = {m, e}, and C = {f, r, e, e}.

Provide the missing representations. Visual: ? Numerical: ? Graphic:-|--|--|--|--|--|--?--|--|--| 0 1 2 3

Find (A upside down U B) upside down U C, given A = {s,e,t} B = {m,E} C = {f,r,e,e,}

Write the statement indicated. Write the negation of the following. A happy face is a smiling face.

What does a ~ line above a = sign mean in Geomentry,

Scientists are researching a contagious disease. They found that, on average, each person who is infected transmits the disease to 0.03 other people within one year. Currently, there are 3,000 infected people in the country. Use Excel or another spreadshe...

A solution contains .370 mol of isopropanol (C3H7OH) dissolved in 1.700 mol of water. What is the mass percent of isopropanol? What is the molality of isopropanol? i've done it a couple times now and i must have something off

It takes the elevator in a skyscraper 4.0 to reach its cruising speed of 10 . A 60 passenger gets aboard on the ground floor.What is the passenger's apparent weight while the elevator is speeding up?

Hi, i am using netbeans and i'm trying to incorporate a video into my project. I want the program to run a video when a button(jbutton) is clicked. i'm totally lost. p.s. i do have JMstudio to run videos in java but got no clue how to use it. Thank you ve...

A 15.0 g of sample of silver is heated to 100.0 0C and then placed in a constant-pressure calorimeter containing 25.0 g of water at 23.0 0C. The final temperature of the system was measured as 25.0 0C. What is the specific heat of silver?

For the reaction: CH4(g) + 2O2(g)-->CO2(g)+2H2O (l) ÄH = -50.38 kJ/mol, How many moles of methane (CH4) must be burned to produce 137 kJ of heat?

A uniform metal rod of mass 100 kg and L (2.5m) is suspended from the side of the building. On the far end of a mass of 100 kg is hung by a rope, (distance L from a building). The rod is connected to the building on the left end by a pivot, (and a force F...

Please help! I am so stuck on the force diagrams A uniform metal rod of mass 100 kg and L (2.5m) is suspended from the side of the building. On the far end of a mass of 100 kg is hung by a rope, (distance L from a building). The rod is connected to the bu...

elimination method 5x + 6y = -75x - 3y = 146

If someone walks at a constant speed, what does that tell us about the forces on the person?

a 5kg suitcase slides 2m down a frictionless ramp incline at 45 degress. How fast is it going at the bottom?

A value of the number m for which there is either no solution or an infinite number of solutions (r ,y ,x) to the system of equations shown below is: 2⁢r+3⁢y-4⁢x=2 -3⁢r-y+m⁢x=-3 -2⁢r-y+3⁢x=-2

Consider water in a well, and a point of measurement at depth below the surface of the water. True or False: if the point of measurement is located at an elevation of 2,000 ft. above mean sea level, and that point of measurement is 40 ft. below the water...

A baseball team has 15 members, 3 of whom always play and bat at the top of the batting order. For the game Sunday, the starting lineup of nine players will be filled out from the remaining members and a batting order will be set.

For a skewed distribution, what is the approximate percentage of data values that are within 2 standard deviations

If x Ω y is defined as the smallest integer of which both x and y are factors, then 10 Ω 32 is how much greater than 6 Ω 20? A. 2 B. 70 C. 100 D. 160 E. 200

What experiment can i use to test the amount of time constants needed to charge or discharge a given capacitor? Please...and is the time to charge and discharge the same? im a bit confused. Thanx in advance

Points K,L, and M are on line l in that order. N is a point not on line l. The measure of angle KLN is (3x+3) and the measure of angle NLM is (5x-7). What is the value of x?

How many revolutions per minute would a 18 m-diameter Ferris wheel need to make for the passengers to feel "weightless" at the topmost point?

Suppose that the coefficient of friction between your feet and the floor, while wearing socks, is 0.250. Knowing this, you decide to get a running start and then slide across the floor.

Find f'(x) for f(x)=sec^2x^2

Locate the absolute exterma of the function on the closed interval. y=3-|t-3| , [-1,5]

3x^2-12x+11=0 Solve for x.

find d^2y/dx^2 (second derivative) for y=cos^2 4x

A bridge is designed with cables that connect two towers that rises above a roadway. Each cable is modeled by the function, H(x)=1/9000x2-7/15x+500, where x and h(x) are measured in feet. a. what is the height above the road of a cable at it's lowest poin...

Find two positive numbers that satisfy the given requirements. The product is 147 and the sum of the first number plus 3 times the second number is a minimum.

How do you put a webpage to this website?

A 2.90 kg mud ball has a perfectly inelastic collision with a second mud ball that is initially at rest. The composite system moves with a speed equal to one-third the original speed of the 2.90 mud ball. What is the mass of the second mud ball?

How do I find out I would evaporate all solvent ( dichloromethane) from mixture with water? I have less than 1500 ppm of dichloromethane in water and want to be sure if I evaporate all that stuff at 160 degrees? I got the feeling that iw would evaporate b...

What is the value of the 5 in each numeral? 3, 458, 201? 152, 670, 400 61, 250

suppose that the charge on the electron and proton did not have the same magnitude but instead differed by one part in 10^10. What would be the net charge on a 1.0 kg sample of helium gas?

g(x) = 10 over x + 7

energy required to raise the temp of H2O from -15C to 125c

A)What is the equation for equivalent resistance for resistors wired in series? What about series wiring makes resistors in series add the way they do? B)What is the equation for capacitors wired in parallel? What about parallel wiring makes capacitors ad...

If you assume that there is 5% acetic acid in vinegar, how much vinegar should you weigh out so that the endpoint requires 25.0 mL of 0.186 M NaOH?

I need help with doing this problem... 5x-7(2-4x). Any idea how to do it?

For each of the equations, solve for y in terms of x. 2x-3y=12 5x+2y=7 How do I do this?

7 grams of chloride was dissolved in water. 20 ml of lead(II)nitrate was used to completely precipitate all chloride (assume atomic mass of 35g/mol). What is the molarity of the Lead(II) Nitrate solution.

Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. Given the proper push, this pendulum can swing in a circle at an angle q of 25.5 with respect to the vertical, maintaining the same height...

Alexa is choosing a number for her new combination lock. She can use three differents digits from 0 to 9. How many arrangements are there?

A 0.565 kg wood block is firmly attached to a very light horizontal spring (k = 185 N/m) as shown in Fig. 6-40. It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stop...

In a common test for cardiac function (the "stress test"), the patient walks on an inclined treadmill (Figure 6-46). Estimate the power required from a 70 kg patient when the treadmill is sloping at an angle of 15° and the velocity is 3.10 km/h.

Answers

The following answers were posted by visitors named Luke.

okay, thanks anyway.

sorry, didn't even see that. how does 0.6973 sound?

It could be. I think the question leaves too much to the imagination!

A) 8 - 3.45 = 4.55 B) 29 - 25.30 = 3.70 C) 29 - 21.15 = 7.85 D) (I had the same homework) 1.effective nuclear charge 2.principle quantum number

23.333333333333333333333333333333 ... i think

NO it's postive 21

Would the answer be no souliton?

Thank you for your help.

Thank you. So can that be factored anymore?

and would I do this oen the same way? 7. 2x^4 + 16x

Thanks reiny for your help.

thanks a lot. that really helped.

thanks a lot. that really helped.

thanks for your help drwls.

What caution must be exercised in the use of models

Equivalent fractions are fractions that may look different, but are equal to each other. Two equivalent fractions may have a different numerator and a different denominator. a/b=c/d

Chapter 17-19 reading HCA 270 Axia

What does you math book say about linear equations? These guys will not give you the answer. A system in which the outputs are components of a vector which is equal to the value of a linear operator applied to a vector whose components are the inputs.

I remember that math question from Axia... MAT 115 final.

thanks let me see... The city, Troy, having been attacked by the Greeks is being led for ten years. Luke

the city of troy is said to have been attached by the greeks for many years

oh sorry for ten years the city of troy is said to have been attacked(or assaulted) by the greeks for ten years thank you so much

So Would it be like this? A,B, = e C = e AUB = s,e,m,t

It should be like this: ____________ | __ __|__ __ __ With two digits outside, and three digits inside!

Can you explain?

I need help. Omega System Services, a member of the Omega Health Foundation operates a free-standing ambulatory care center that averages $60 in charges per patient. Variable costs are approximately $10 per patient, and fixed costs are about $1.2 million...

about 15 meters?

where did you get the (2x) at the end from?

Answer in the book is 6±√3/3 I was able to get to (12 ± √12)/6 but I couldn't figure out how you got the rest.

.43-.18 = .25 .25 * 4 = 1

how did you get -4sin8x from -8cos4x*sin4x? The answer is -32(cos^2 4x-sin^2 4x) but not sure how to get there

nevermind, i figured it out.

the super ball will rebound at 0.12745 seconds at a velocity of giga 10 milliseconds.

DrBob222, Is the answer 5M?

48 divided by 4 is 12. 1 by 23 #1 2 by 22 #2 3 by 21 #3 4 by 20 #4 5 by 19 #5 6 by 18 #6 7 by 17 #7 8 by 16 #8 9 by 15 #9 10 by 14 #10 11 by 13 #11 12 by 12 #12

awsome thanks even though i didn't post this question

Amanda says her quilt has 9 equal parts. Jeremy says it has 3 equal parts. Can they both be correct?

I am going to go with saying the answer is not B so you have the option of guessing between A, C, and D.

I say C.He should averge the annual cost of the insurance by dividiing the total premium by 12. Then, he should budget the resulting monthly amount under the heading,Insurance. Finally,he would do well to put that monnthly amount in his savings account an...

the answer to the last one is B. This is an expense the person overlooked or did not account for when setting up the budget.

COLA raises are linked to the national inflation rate I am not American and I am aware of that I am not sure if we have that in England.

I don't think that answer is correct Ms. Sue are you even a tutor or what you just seem to give me some correct and incorrect answers a lot....

it's actually $255

lol Ms. Sue knows nothing

Ms. Sue you are incorrect the correct answer would be D.

How can I draw water powering electricity on my paper? I have to draw a house and ways to power it so I drew the sun, wind mills, solar panels, thick walls, electric poles? Do I draw water near the house?

it's possible. You know 160 are taking math and OF the 160 90 are ONLY taking math leaving 70 taking both. 90+70(160) + 50 = 210. so 40 are taking c.s. but not math 90-math 70-math & c.s. 40-c.s. 50-neither the rest is a:40/250, b:(90+40)/250, C:40/250, d...

Document this quotation properly (The Lightning Thief, Riordan, pg. 84).

Like, what are the words in parenthesis? Do I have to use it

So, like this? "With a double-edged blade" page 153 of The Lightning Thief by Riordan?

Thanks Ms. Sue! :D :D

1. 6 Carbon atoms per molecule. 4 Molecules. That's all i know. xD

Also, i almost forgot it also is 24 carbons, 48 hydrogen, 24 oxygen.

We consume carbon in the form of carbohydrates (like the pop you drink or the donuts you eat). We also breath in oxygen. It comes out in the form of carbon dioxide and water.

Singapore. Looked at the results after the quiz and got it wrong when i put New Zealand.

what is the formulae to find total fix cost, total fix cost, total variable cost, marginal cost,average fix cost,average variable cost,average total cost.

What would my R be? 741torr x 200mL=nR X 27.2

p2=.792atm x 683mL/ 292.15 x 349.15/733mL I got .882 and it says it wrong. Do you know what I done wrong?

so .975 x 200mL = n x .08205 x 27.2?

so could I solve like n=.975atm *.200L * (300.2/.08205)? 713.45 and thank you for your help!

Thank you! It was right!!!

What is the molar mass of the by-product? Calculate the molecular formula of the by-product. Calculate the empirical formula of the by-product.

So would you do M=RT/Pi M=(301 x .08205)/.005 4939.41?

So would the molar mass be 168.2? Empirical be c3h2n1o2?

How do I solve for the y? I get 0.2=23.71g / 24.71+.281 Y. Y But I don't know how to solve

HOW DO I FIGURE OUT THE MOLECULAR FORMULA FROM THE DATA?

@MathMate Thank you so much! No wonder I was going nowhere even when I did the truth table, I had a mistake in translating the proposition. Thanks again.

Thank you just making sure.

Thanks so much i understand it now :)

Ok so i set y=(4x)^1/2 Using the distance formula... i got it down to d=((x-8)^2+((4x)^2)^1/2 Took the derivative and got dy/dx=2x+1/((x)^1/2)-16

Oh so then i plug x=6 back to the original to get Y

I was thinking for number 12 the convention to 1818 that set the boundary between the us and Canada what do you guys think??

And 13 what is 13 i am very confused??

Ok, I hyphenated the words "three-to-five digit." But the rules say that a word that modifies the adjective and not the object should not have a comma separating the modifier and the adjective it modifies. In my sentence, I have the phrase "row upon row o...

Is this better? At elementary school, my teacher delighted in handing me worksheets that were crowded with row upon row of three-to-five digit long division problems.

I added words instead of a comma because there aren't multiple elements in a series or coordinate adjectives, there aren't two independent clauses, there are no introductory or parenthetical elements, nothing is quoted, there is no confusion, and there ar...

Thank you so much for explaining, and thank you for the website. I saved the link and will be using it this quarter as I take my English class. :-)

5 cos x + 2 = 0 5 cos x = -2 cos x= -2/5 arccos (-2/5) = answer (check to see if you are supposed to answer in degrees or radians - change calculator settings accordingly)

3.16•10^3 in standard form is 3.16•1000 which is 3160. The Real Answer is: 3160

Deez nuts!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!got emm

150 degrees papunta sa puso mo

She would get 0 Rs. You would have to work backwards. The equation would be R= rina's Rs 300*3-100=R

It would be Mark because a coin has two sides, 50/50 chance for a head or a tail.