Thursday
April 24, 2014

Posts by dennis


Total # Posts: 120

Science
whats is a structure that was built with keeping costs low as the primary concern?Also, what is a structure (with the same function as the one above) that was built with no regard to cost: What are the difference between the two?

science
Also, what is a structure (with the same function as the one above) that was built with no regard to cost: What are the difference between the two?

science
whats is a structure that was built with keeping costs low as the primary concern?

Math
Sorry about the Chinese, the Chinese words are Celsius.

Math
I don't understand this question, could someone solve/walk me through this? One afternoon in Fort Simpson, Northwest Territories, the air temperature was −10ºC and the wind speed was 25 km/h. The air temperature dropped by 5ºC in the evening, but the wind c...

algebra
3X+4=-8+6X

chemistry
What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the molarity of NaF in thi...

chemistry
Liquid elemental iron is produced in the thermite reaction because enough heat is generated to melt the iron: 2 Al(s) + Fe2O3(s)----> Al2O3(s) + 2 Fe(l) What mass of aluminum is needed to produce 750 grams of iron?

chemistry
Liquid elemental iron is produced in the thermite reaction because enough heat is generated to melt the iron: 2 Al(s) + Fe2O3(s)----> Al2O3(s) + 2 Fe(l) What mass of aluminum is needed to produce 750 grams of iron?

chemistry
15. Liquid elemental iron is produced in the thermite reaction because enough heat is generated to melt the iron: 2 Al(s) + Fe2O3(s)----> Al2O3(s) + 2 Fe(l) What mass of aluminum is needed to produce 750 grams of iron?

chemistry
What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the molarity of NaF in thi...

chemistry
What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the molarity of NaF in thi...

math
Find an angle between 0 & 360 degrees that is coterminal 820 degrees.

Application: Two-Sample t-Tests
Should Martha use an independent-samples t-test or a related samples t-test? Explain your answer.

geography
What does the word napasta mean in english?

english grammar
Ramesh generally drinks an orange juice

business mathematics
find the total amount due on a loan of N80,000.00 at 18percent simple interest at the end of 4months. (2)question is find the total amount due on a loan of N600,000.00 at 12percent simple interest at the end of 3years. Pls i need answer

statistics
A high school counselor wants to examine whether the teenage pregnancy rate at her school is different from the rate nationwide. She knows that the rate nationwide is 15 %. She randomly selects 80 female students from her high school. She finds that 9 out of 80 students are ei...

science
Calculate the partial pressure of oxygen gas a diver breathes with a heliox mixture containing 2% oxygen at a depth of 100 metres where the total pressure is 100kPa

Math 6
Some information is missing. The engine has 1 1/4 gallons of oil in it now? And the question is how much more oil is needed to fill to capacity (full). What is the capacity of oil in the engine?

math
h<48 is not correct, since since this says the height (h) is less than 48" (ie too short).

math
In order to ride the roller coaster, you must be 48" tall, so H=48. If the question is you must be at least 48" tall, then H=> (equal to or greater than) 48" tall.

math
One possible answer is Marty's pizza was much larger than Luis' pizza.

math
One equation would be: x+y=69, correct? (add two integers to equal 69). But then we know the integers are consecutive, so the second integer (y) is one greater than the first interger (x). So the next number after x is x+1 So we can say y=x+1 Then follow the train: x+y=69 x+(x...

Math
A scale drawing of a house is drawn with a scale of 1 in. : 16 ft. Find the actual length of a hallway that is 5/8 in. On the scale drawing. Show your work

cryptography
The following file cshift.txt is encrypted using a shift cipher. Decrypt it using key exhaustion. I expect to see 26 complete lines of output. Your program does not have to pick out which shift is English. You may do that by eyeball. Then print the proper plaintext (with space...

Geometry
the measures of two complementary angles are 16z-9 and 4z+3. Find the measures of the angles.

computer science
Compare how data is handled in the NTFS EFS+, Ext3fs, and NTFS. Which one do you consider to be the most reliable file system? Why?

Physics
A sprinter explodes out of the starting block with an acceleration of +4.1 m/s2, which she sustains for 1.2 s. Then, her acceleration drops to zero for the rest of the race. (a) What is her velocity at t = 1.2 s. (b) What is her velocity at the end of the race?

Physics
Two motorcycles are traveling due east with different velocities. However, four seconds later, they have the same velocity. During this four-second interval, cycle A has an average acceleration of 1.8 m/s2 due east, while cycle B has an average acceleration of 3.8 m/s2 due eas...

Physics
A car with a mass of 1500 kg moves at 26 m/s. What braking force is needed to bring the car to a halt in 10 s?

Organic Chemistry
A lower yield of phosphonium salt is obtained in refluxing benzene than in xylene. Look up the boiling points for these solvents, and explain why the difference in boiling points might influence the yield. I'm not sure how to answer this question. I see that benzene has a ...

Math
Dividing a Polynomial - need detail and answer please!!! (6x^4+4x^3-x^2)/(6+2x)

Biology
Dont know the first one Broken character i'll get over it

math
Quadrilateral ABCD is a square. The coordinates of point A are (3,2), coordinates of point B are (-3,2),and the coordinates of points C are (-3,-4). where on a coordinate plane would I mark the location of point D??

math
how do i solve 3x+2y=40,x+y=18 i would like the work shown.. thanks.

Chemistry
What would be the dangers of mixing chlorofluorocarbons (r-22 refrigerant)and chlorine gas in a indoor swimming pool area? Question is in regard to a substanial R-22 refrigerant leak that ends up in a enclosed pool area daily mixing with chlorine gas in that room.

chemistry
What would be the dangers of mixing chlorofluorocarbons (r-22 refrigerant)and chlorine gas in a indoor swimming pool area? Question is in regard to a substanial R-22 refrigerant leak that ends up in a enclosed pool area daily mixing with chlorine gas in that room.

chemistry
What would be the dangers of mixing chlorofluorocarbons (r-22 refrigerant)and chlorine gas in a indoor swimming pool area?

phys
How many kcal of heat are required to vaporize 25.0 kg of water at 100C?

Math equation
y = -1/2 x-4 Complete the table for this equation. x y (x,y) -1 -2 -4 2 8

physics
Two objects (m1 = 5.15 kg and m2 = 2.75 kg) are connected by a light string passing over a light, frictionless pulley as in the figure below. The 5.15-kg object is released from rest at a point h = 4.00 m above the table. (a) Determine the speed of each object when the two pas...

statistics
construct the confidence interval for the population mean c=0.98,x=5.6, s=0.6, and n=45

math
Four darts are thrown at a dart board with four rings, each ring has a different value, If all four darts hit the board, how many different point totals are possible?

english
i need help with capilalization

math
how do i solve find x in x^+6x+9

health
Employees from the billing department are not receiving the accurate codes and information needed for data entry, slowing production and payment for the doctor. As head of the billing department, you have been delegated to lead a problem-solving team to resolve this issue. o D...

Islamic Managerial Ethics
Discuss the relevance of the five pillars of Islam to managers of organizations in the world today.

math
Could someone please how this problem should be solved? Simplify and write the answer in exponential notation using positive exponents. 2 to the 4th x 2 -2nd power

math
translate to an algebraic expression. a less than b

f/math
the common ratio of a g.p is 2.if the 5th term is greater than the first term by 45, find the 5tth term

pre algebra
A train leaves the station and travels north at 85 km/hr. For hour later, a second train leaves on a parallel track and travels north at 125km/hr. How far from the station will they meet?

business
o Joint-stock company o Limited liability company o Partnership o Sole proprietorship For this assignment... Describe a business scenario, either real or fictional, that depicts each of the following forms of business organization:

verb tense
you have room inside for one student at a time.

college physics
what about the gradient and intercept at y-axis?

college physics
rearrange the equation T = 2pi(l/g)^(1/2) in the form of y=mx+c where T = dependent variable, L = independent variable, and 2pi and g = constant.

Economics
What are the weeknesses of chamberling doupoly model?

STATISTICS
1 to 6264. find the probability of selecting a number that is not divisible by 1000

math
cory drops a bouncing ball form a height of 50 ft and it rebounds to 90% of its previous height.find the total distance the ball will have travelled when it hits the ground for the fifth time

Literature
iam writting a term paper on the relationship between literature and history but i dont know what to write someone please help me out.your answers are most wlcome.thank you.

algebra
a train leaves a station and travels north at 60 km/hr. three hours later, a second train leaves on a parallel track and travels north at 100km/hr. how far from the station will they meet?

college (physics thermo)
A 1.20 mol sample of an ideal diatomic gas at a pressure of 1.20 atm and temperature 380 K undergoes a process in which its pressure increases linearly with temperature. The final temperature and pressure are 680 K and 1.83 atm. (assume 5 active degrees of freedom) b. Determin...

bio
3. 3

college
If preferred stock was issued at 50 dollars a share at 8% annual interest rate what would be the annual yeild?

math
A horizontal clothesline is tied between 2 poles, 12 meters apart. When a mass of 5 kilograms is tied to the middle of the clothesline, it sags a distance of 1 meters. What is the magnitude of the tension on the ends of the clothesline? A constant force moves an object along a...

multivariable calc with some high school physics
A horizontal clothesline is tied between 2 poles, 12 meters apart. When a mass of 5 kilograms is tied to the middle of the clothesline, it sags a distance of 1 meters. What is the magnitude of the tension on the ends of the clothesline? A constant force moves an object along a...

Trig (inverse functions)
I found my mistake, please disregard.

Trig (inverse functions)
Problem: tan[arccsc(-5/3) + arctan(1/4)] My work: let arccsc(-5/3)=X and let arctan(1/4)=Y where -pi/2<=X<=pi/2, X cannot be 0 and where -pi/2<Y<pi/2 so that cscX=-5/3 and tanY=1/4 The problem can now be written as tan(X+Y) =tanX + tanY/1-tanXtanY which could also ...

Math
well my spacing for -4, 0, 10 didn't come out right, but hopefully you get the idea. -4 at the beginning, 0 towards the middle, and 10 and the end.

Math
A line graph with a solid dot at -4, a solid dot at 10, and shading between the two. o--------------------o -4 0 10 where the 0 are solid or you could use a [ at -4 and a ] at 10 [----------------------] -4 0 10 I think that is how interval notation works, but I could be wrong.

Inverses
Thank you very much. The answer doesn't change, but my trig teacher wants to see all of work, and I just wasn't sure which figure to use.

Inverses
Problem: cos[arccos(-sqrt3/2)-arcsin(-1/2)] This is what I have: cos [(5pi/6)-(11pi/6)] cos (-6pi/6) or -pi giving an answer of -1 What I am wondering is should I use the (11pi/6) or should I use (-pi/6) because of the restrictions on arcsin x (-pi/2)<=x<=(pi/2) Thank yo...

Geomotry
Thank you Ms Sue.

Geomotry
How do you calculate the square footage on the surface of a cylinder if you know the diameter and length?

Algebra
Because when you multiply or divide any number (a positive or a negative number) by a negative number you will automatically change the sign of the number you are performing the operation on. In an inequality you will then reverse the relationship between the numbers on each s...

Trig
whoops, sorry everyone. The original message was supposed to be a reply to another post.

Trig
Dang, I see where I messed up. Thank you so much.

Trig
Solve in terms of sine and cosine: sec(x) csc(x)- sec(x) sin(x) so far I have: 1/cos(x) 1/sin(x) - 1/cos(x) sin(x) I am not sure where to go to from there. The book says the answer is cot(x) or cos(x)/sin(x) Thank you in advance.

algebra
determine which two represent perpendicular lines; y=6x-3,y=1/6x+3, y=-1/6+3, or y=1/6x-3.

algebra
solve system by graphing 3x+y=6 and 3x-y=0.

think critically
crossword challenge 3 letter word a pen pal?

think critically
a grumpy ocean dweller?

science
Milligram

soc studies
who makes a globe, like ... a map maker is a cartographer

English
How do you find the etymology for example of the word panic? In any dictionary (in print or online) there should be a section, often in brackets, that gives you the history of the word. Go here: http://www.answers.com/panic Scroll down to just below the definitions, and you...

Poetry
What are the four basic elements of poetry (Broken Link Removed) Here are a couple of sites which also may help. http://www.buzzle.com/articles/basic-elements-of-poetry.html http://www.poems-and-quotes.com/article.html?id=398

Chemistry (Check)
Classify each of these statements as always true, sometimes true, or never true. __ST___13.In an equation, a substance is shown to be in the gaseous state by placing an upward-pointing arrow after its formula. ___ST___14. Atoms are destroyed in a chemical reaction. ___AT____15...

Modern World Histoy
What would one say their experiences may be during A Bloody Stalemate? Think about a soccer game where no matter what either team does, neither is able to win. Both have gone through all there player list; both have gone through the over times..... How would they feel, when it...

Math
Suppose income = $100, PX = $2.00 if the consumer buys less than 20 units of X, PX = $4.00 if the consumer buys more than 20 units of X. With income or composite good Y on the Y-axis, draw the budget constraint. Label ALL intercepts.

Chemistry
what is the mass of two moles of NaCl? You look up the exact numbers on the periodic table or some other chart. I will use approximations. 1 mol NaCl = 1 Na + 1 Cl = 23 + 35.5 = 58.5 grams. 1 mols NaCl, then, is 2 x 58.5 = ?? g.

Science/Chem
How many representative particles are in 2.5 mol H2O2? each mole consists of 6.02*10^23 things. Memorize that.

World History
what is the danger of Lenin's idea of party leadership? Lenins idea of party leadership was dangerous because in such a corrupt system, a party was terrible for the local environment. Many people would fight for the top leadership position. thanks. why did the Germans allo...

Chemistry
How are the two parts of a conversion factor related? Either the numerator or the denominator is one of the units needed for the converstion, then the denominator/numerator is the other unit needed. thanks. whats two conversion factors based on the relationship between hours a...

Chemistry
How do i Convert 170 degress C to kelvins? K = 273 + C

Chemistry
What the relationship between degrees Celsius and Kelvins? A one degree change in Celsius = a one degree change in Kelvin.

Chemistry
How does weight differ from mass? Weight changes with gravity while mass does not change.

Chemistry
What is the volume of a paperback book 21cm tall, 12 cm wide, and 3.5 cm thick? just multiply them all together, so do 21 x 12 x 3.5 = and that will be the answer =)

Chemistry
A change of temperature equal to one Kelvin is eual to a change of temperature of how many degrees Celsius? 1

Chemistry
What is the zero point, O K, on the kelvin scale called? absolute zero. or 0 Kelvins.

Chemistry
What properties explain the behavior of liquid-filled thermometers? Liquids expand upon heating and contract upon cooling. thanks.. What are the two reference temperature on the Celsius Scale? Freezing point of water is 0o C and boiling point is 100o C. I suppose they may serv...

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