Thursday
December 18, 2014

# Posts by emma

Total # Posts: 1,230

algebra
Use the substitution method to solve the linear system. Thanks! s= t+4 2t+s=19
January 6, 2013

trig
2sinxcosx+4sin^2xcos^2x=0 solve for x in radians between [0,2pi) (I mean that it is sine squared x and cosine squared x not sine to the power of 2x or cosine to the power of 2x)
December 19, 2012

Math
When the mean is greater than the median, what does it suggests about the data set?
December 17, 2012

English
Find the plural that has been formed incorrectly. Then write it in its correct plural form. Dad was hoping to catch several bass and trouts for our suppers. I'm not sure if it's "trouts" or "suppers".
December 13, 2012

math
andrea cuts 62 1/2 inches of ribbon into 4 equal hair ribbons. How long was each hair ribbon?
December 12, 2012

Algebra
I don't get how you would know which way to shade the inequality when it's true or false. For example the inequality 2x+3y> 12 When I solve it it's y>-2/3x+4 But when I graph the line how would I know which side to shade?
December 12, 2012

Language
Hi! So I am having a hard time in Chinese class. Paying Attention that is. My teacher lets all the students goof off, and it's hard to pay attention. She doesn't care if we are on our phones, so it's a BIG temptation. I know that if I payed attention in class more...
December 11, 2012

Algebra
I solved the inequality and now I have to graph and shade it in. Y<-5x-6 0<-5x-6 I used the test point 0,0 and substituted in y but how do I know if it's true or false?
December 11, 2012

Algebra
Solve the inequality and graph. 7<1-x<13 I got -6 >x >-12 Is that correct?
December 9, 2012

English
Identify the nouns and verb/verb phrases in the sentence. Employers value honesty and hard work. Nouns: Employers, honesty, and work Verb: Value
December 9, 2012

Chemistry
The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution. What is the concentration of the H2SO4 solution (in M)?
December 6, 2012

Chemistry
The temperature rises from 25.00 °C to 29.00 °C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate ÄErxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/°C . The ...
December 6, 2012

Chemistry
How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.
December 6, 2012

chemistry
Choose the bidentate ligand from the substances below. A) cyanide ion B) ammonia C) EDTA D) carbon monoxide E) ethylenediamine
December 6, 2012

Chemistry
The complex ion, [Ni(NH3)6]2+, has a maximum absorption near 580 nm. Calculate the crystal field splitting energy (in kJ/mol) for this ion.
December 6, 2012

Chemistry
Which of the following compounds can exhibit cis-trans isomerism? A) [Fe(CO)5ONO]2+ B) [Fe(CO)3(NH3)3]3+ C) [Cu(CO)5Br]+ D) [Cr(H2O)4Br2]+ E) [Fe(NH3)6]2+
December 6, 2012

Chemistry
Determine the volume of H2S (at 375 K and 1.20 atm) needed to produce 55.0 g of S. Assume that there is excess SO2 present. 2 H2S(g) + SO2(g) ¨ 3 S(s) + 2 H2O(g)
December 6, 2012

Chemistry
What element is undergoing oxidation (if any) in the following reaction? CH4(g) + 2 O2(g) ¨ CO2(g) + 2 H2O(g)
December 6, 2012

Chemistry
combustion analysis of 63.8 mg of C,H, and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?
December 6, 2012

RE:ENGLISH QUOTE
Is there a different way to explain the meaning of the quote?
December 2, 2012

RE:ENGLISH QUOTE
Here is my meaning of Hellen Keller's quote: It means that by using my voice I can do something. I may not be THE one but AT LEAST I AM one. I know that I can't do everything but the thing is, I CAN do SOMETHING. I will do what I can do to make a difference. I don'...
December 2, 2012

English
“I am only one, but still I am one. I cannot do everything, but still I can do something; and because I cannot do everything, I will not refuse to do something that I can do.” Please explain what this quote means, thanks!
December 2, 2012

English
"It is better to lead from behind and to put others in front, especially when you celebrate victory when nice things occur. You take the front line when there is danger. Then people will appreciate your leadership." What does this quote mean?
December 2, 2012

English-Speech
I am workng on my introduction part of my speech and here is my transition sentence: With my voice, I can make a difference in 5 different ways. Would these be like the examples of the "5 different ways" ? preventing people from doing a bad action, helping a friend ...
December 1, 2012

English
What does the quote, ""The world is not interested in what we do for a living. What they are interested in is what we have to offer freely - hope, strength, love and the power to make a difference!" mean?
November 30, 2012

math
You need 1/2 cup of sugar to make a three layer cake. How much sugar would you need for one-layer cake?
November 29, 2012

math
2/10 , 3/15 , 4/20, 5/25 Those are some examples.
November 27, 2012

English
I want to put these words in a sentence that makes sense. Many will think that my voice doesn't matter for people my age. It doesn't sound right to me.
November 27, 2012

Physics
three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub. Disk A has radius R; its hub has ...
November 27, 2012

English
What would be a good quote to describe me encouraging someone to become a better singer? How about giving advice and preventing something?
November 25, 2012

math
You are correct.
November 25, 2012

math
4x if x=0.016 You just substitute in 0.016 for x 4 * 0.016 = ?
November 25, 2012

English Speech
That does not make any sense to me...
November 25, 2012

English Speech
This year, all the students in the same grade has to give a speech and the topic is "My voice is important because..." instead of repeating in every new story, "my voice is important because.." what is another way to state it?
November 25, 2012

physics
The small mass m sliding without friction along a looped track is to remain on the track at all times, even at the very top of the loop of radius r. a) In terms of the given quantities, determine the minimum release height h b) If the actual release height is 5h, calculate the...
November 24, 2012

chemistry
Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by difference a tablet ...
November 20, 2012

chemistry
Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by difference a tablet ...
November 20, 2012

Chemistry
Aspirin tablet, mass of tablet= 0.4149 g concentration of iron III salicylate complex = 3.997E-4, What is the concentration of ASA in the original solution? What is the mass of ASA in the original solution? The procedure was as follows: accurately weigh by difference a tablet ...
November 20, 2012

Chemistry
So does that mean that the salicylate and the iron 3 complex will have an equal amount of mol since they are reacting in a 1:1 mol ratio. If this is true than how will i calculate the concentration of the iron 3 salicylate complex?
November 19, 2012

Chemistry
1 ml of 8.675x10^-3 M sodium salicylate was dispensed in a 100 ml volumetric flask, It was diluted to 100ml mark with acidified 0.02 M Iron (III) Chloride solution. What is the number of moles of Iron (III) Salicylate complex?
November 19, 2012

History
What are five kinds of cases heard by the Federal Courts?
November 19, 2012

History
Thanks! It really helped a lot. I don't think I need help on the question that I posted anymore.
November 19, 2012

History
What are the four powers denied to congress?
November 19, 2012

chemistry
Spectrophotometric analysis of commercial aspririn. If the number of moles of sodium salicylate are 8.675x10^-6 what would be the number of moles of Iron (III) Salicylate complex and what would be its concentration. The volume of sodium salicylate used is 1 ml and its ...
November 19, 2012

physics, university
A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 x 10-8 ohms/m and the density is 7.86 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 ohms. a) What ...
November 19, 2012

Math
14.8cos(27.8)(29cos(x))+14.8sin(27.8)(29sin(x))=22 How do you solve for x?
November 17, 2012

Physics
Vectors A and B are in the xy plane and their scalar product is 20.6 units.? If A makes a 27.8 angle with the x axis and has magnitude A= 14.8 units, and B has magnitude B= 29.0 units, what can you say about the direction of B?
November 17, 2012

Did I do this problem right? Rewrite the equation in slope-intercept form. y+4=5(x+2) y=5x+6
November 15, 2012

physics
The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 46.0o is 39.0 percent. What is the minimum value of the temperature at which the engine takes in heat? *I think I keep doing a step wrong in here so step by step instruction would be so...
November 15, 2012

PHYSICS
15.0 moles of an ideal gas, at an initial pressure of 3.50 x105 N/m2 and an initial volume of 1.200 m3, undergo a small isothermal expansion to a volume of 1.220 m3. Find the work done by the gas.
November 14, 2012

English
Are there any words that end with "ale" or "ail" that is a place?
November 14, 2012

Chemistry
Thankyou Dr. Bob also on my other question I am not sure how to get the heat capacity of NH4Cl to calculate molar enthalpy and I also don't know how to determine the concentration of NH4Cl inside the calorimeter. Please help me on that question as well and thankyou soo much.
November 13, 2012

Chemistry
A 5ml, 10ml, 15 ml, and 20ml Aliquot of 0.010 M sodium salicylate solution was diluted to 100 ml in four different 100ml volumetric flasks with the iron (III)Chloride solution. What are their concentrations.
November 13, 2012

Chemistry
Thankyou Dr. Bob and can you please help me on one more question if this reaction goes to completion what would the final concentration of NH4Cl in the calorimeter. I know how to figure it out if its not in the calorimeter but I am wondering if the calculations are different ...
November 12, 2012

Chemistry
I don't know the heat capacity of NH4Cl or the density of it, can you please help me figure those out.
November 12, 2012

Chemistry
Calculate the molar enthalpy for the following reaction. HCl(aq) + NH3 (aq) --> NH4Cl (aq). HCl = 50 ml (2.00M) NH3 = 50 ml (2.05 M) Delta T = 9.28 degrees Celsius. Ccal = 28.9J/g degrees celcius.
November 12, 2012

Math
Please help me understand this question, thanks! 10. Write the slope-intercept form of an equation of the line perpendicular to the line in Exercise 7 with a y-intercept of -3. 7. (4, -9), (-3, 2)
November 12, 2012

Physics
Three uniform thin rods, each of length L = 16 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 50 g. Where is the center of mass of the assembly (x, y)?
November 12, 2012

Physics Q
If a water heater has a capacity of 54.4 gallons and a 4910 W heating element, how much time is required to raise the temperature of the water from 19.8oC to 60.0oC? Assume that the heater is well insulated and no water is withdrawn from the tank during this time.
November 10, 2012

Physics Help!
An air bubble has a volume of 1.51 cm3 when it is released by a submarine 102 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume that the temperature of the air in the bubble remains constant during ascent.
November 10, 2012

PHYSICS!
0.115 kg of water at 81.0o C is poured into an insulated cup containing 0.220 kg of ice initally at 0o. Calculate the mass of liquid when the system reaches thermal equilibrium.
November 10, 2012

Physics
If a sonar echo takes 2.20 seconds to return from a whale, how faw away is the whale?
November 6, 2012

Math
Actually it's 12 because you have to divde 24 by 2 and it leaves you with 12.
November 4, 2012

Math
8 / 10 = x / 15 times 15 on each side =24
November 4, 2012

Literature
Please help me understand this, thanks. The way a topic is handled is called its treatment. Review the chart you completed as you read the speech. Then describe Obama's treatment of his family in the speech. By speech, it's referring to Out of Many, One.
November 4, 2012

Math Vocab
I am doing vocabulary for math and one of the words are negative correction. I search all over the place and didn't find a definition for that word. Help please.
November 4, 2012

Algebra
Oh ok I get it. Is there any work to show to get this answer?
November 1, 2012

Algebra
May you please help me understand how to do this? Thanks Give the slope of a line perpendicular to the given line. 1. y=3x+5
November 1, 2012

Thermal Physics, Kinetic Theory of Gases
Your velocity is incorrect, it is too slow
November 1, 2012

Language arts
Check my answer please Which of the following would not be considered an asset? A) credit card debt B) a good credit rating C) an education Answer: A
October 29, 2012

calculus
lim x^(3)+x x->2 Suppose x^(2)+1 is greater than equal to f(x) is greater than equal to 4x-3 for all x. Compute lim f(x) x->2
October 27, 2012

math
(-x-3)+(4x-7) =3x -10
October 25, 2012

Math
To rewrte it in y=mx+b form, you do this : 3y=6x+3 divide both sides by 3 so it would be y= 2x+1
October 25, 2012

math
(14x-5)+(6x-4) = 14x-5+6x-4 Combine all like-terms =20x-9 Thus, 20x-9 is your final answer. Hope I helped!
October 25, 2012

English
Oh okay, thanks I get it now.
October 25, 2012

English
The full verb is "was propelled" Why wouldn't it be passive?
October 25, 2012

English
Write the complete verb in each sentence. Label it active or passive. 1. It was propelled by six paddles on each side. Each side was propelled by six paddles. Passive?
October 25, 2012

Algebra
May I ask how you got 5x-5=0 ?
October 23, 2012

Algebra
I don't get how you do this please help, thanks! Write the equation in the form ax+b=0. Then write the related function y=ax+b. 5x+2=7
October 23, 2012

math
Write a formula for this sequence: 50, 83, 116, 149,... I just dont know how to find it..
October 23, 2012

English
I have to come up a reason for my claim help please? Thanks! My claim: technology is harmful to children and teens.
October 22, 2012

Algebra
Can you please help me understand this? Thanks Find the value of y so that the passing line through the two points has the given slope. 1. (2,y) (3,3) ;m=2
October 16, 2012

Change 85% to a decimal which is 0.85 and then times it by 20: 0.85*20 = ? You times them together and you'll get your answer. Hope I helped!
October 16, 2012

English
Change the verb into the tense indicated. I am here. (past perfect)
October 15, 2012

Physics
A 2.7 kg bucket of water is raised upwards by a rope. If the bucket has an acceleration of 3.4 m/s/s, find the force exerted by the rope on the bucket.
October 12, 2012

Physics
A car with a mass of 1797 kg is moving to the right at a constant velocity of 2.50 m/s. What is the net force acting on the car?
October 12, 2012

Physics
On an aircraft carrier, a jet can be catapulted from 0 to 155 mi/h in 2.00 s. If the average force exerted by the catapult is 5.53×106 N what is the mass of the jet?__________ kg
October 12, 2012

Physics
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.50 x 105 kg, its speed is 27.0 m/s, and the net braking force is 4.73 x 105 N. (a) What is its speed 7.50 s later? (b) How far has it traveled in this time? (a) Its speed 7.50 s ...
October 12, 2012

History
What country are these cities in? Bellman, Port-au- Prince , Tegucigalpa and Managua?
October 11, 2012

Algebra
How can you tell by looking at a table if its quadratic, linear or exponential? For ex. x: -2, -1, 0, 1, 2 y: 6, 1, 0, 1, 6
October 10, 2012

English
Complete the sentence by writing the correct form of the verb shown in parenthesis. "It has _______," Martin said matter-of-factly. (burst)
October 10, 2012

Physics
In a circus performance, a monkey on a sled is given an initial speed of 3.2 m/s up a 31° incline. The combined mass of the monkey and the sled is 20.7 kg, and the coefficient of kinetic friction between the sled and the incline is 0.20. How far up the incline does the ...
October 9, 2012

Landforms-history
What is a large, raised that rises above the surrounding ground?
October 4, 2012

science
how does a change in wavelength affect the speed of a photon.
October 3, 2012

science
how many days would it take to fly to Jupiter (from Earth) in a space shuttle at 45,000 miles per hour? The minimum distance between the Earth and Jupiter is 365 million miles.
October 3, 2012

science
how many days would it take to drive from the earth to the moon at a speed of 75 miles per hour? the average distance from the earth to the moon is 380,000km. 1 km=0.62 miles
October 3, 2012

History
True or False: 1. A region near the ocean will be cooler than a region inland of the same latitude. 2. The tundra is an area of cold climate with low-lying vegetation. (true?) 3. The climate of highland regions gets colder and colder as you go higher. (false?) 4. Temperate ...
October 2, 2012

Math
How can you tell by looking at a graph if it's a linear, quadratic or exponential function?
October 1, 2012

English
I am writing an evidence paragraph telling what people do to their bodies in order to look good. Make-up, braces, surgery , etc are examples but they are not really "technology". This is what I have so far: Today we have upgraded technology ... Is there another word ...
September 30, 2012

English