Friday
September 4, 2015

Posts by Anonymous


Total # Posts: 83,890

Chemistry
Suppose you have two 100-mL graduated cylinders. In each cylinder, there is 40.0 mL of water. You also have two cubes: one is lead, and the other is aluminum. Each cube measures 1.8 cm on each side. After you carefully lower each cube into the water of its own cylinder, what ...
September 4, 2015

Chemistry
So the answer is c,correct? The density of copper decreases as temperature increases. Which statement accurately describes the changes in a sample of copper when it is warmed from room temperature to 95 degree Celcius. a. The sample will become lighter. b. The sample will ...
September 4, 2015

eced
I figure out the rest of the questions
September 4, 2015

eced
Thanks Steve the first question is a correlation
September 4, 2015

eced
Piaget stated the children's theories about the world? A.remain the same until adulthood. B. Undergo three major changes during development c.are never test by the children. D.are based on adults tell them. I am think b. If parent believe that children are tabula rasa at ...
September 4, 2015

eced
A correlatibas .82 was found betweenen number of hours studied and final exam scores. A.students who stuief less received a high exam scores. B.students who studied who studied received lower exam scores. C.studying caused studies to received higher exam scores. D.The amount ...
September 4, 2015

Chemistry
The density of copper decreases as temperature increases. Which statement accurately describes the changes in a sample of copper when it is warmed from room temperature to 95 degree Celcius. a. The sample will become lighter. b. The sample will become heavier. c. The sample ...
September 4, 2015

computers
What is the primary way to access applications in Windows 8?
September 4, 2015

education
I forgot to put not in c.Yuri is interest in finding out whether exercise affects boy and girls performance on a memory task.the dependent variable in this situation is. A.memory performance. B.the amount of exercise.c.the age of the children. I am think c
September 4, 2015

education
A weakness of experimental studies is that. A.they cannot be used to determine cause and effect b.they cannot be used in a laboratory setting. C. Results may be representative of real-life behavior. D. They are usually expensive. I am think b or c
September 4, 2015

physics
An ice cube of mass 0.200 kg melts at 0.0°C, and then the melt water is heated to How much heat was added to the ice cube? For water and Lv = 2257 kJ/kg. The specific heat capacity of water is 4.19 kJ/kg ∙ °C.
September 4, 2015

science (physics)
An applied force of 50 Newtons is used to move a 6 kilogram mass.The opposing friction force to overcome is 2 Newtons.
September 4, 2015

english
India elections: domination of Nehru-Gandhi dynasty under threat.
September 4, 2015

english
What are the two main reasons for “a wave of discontent directed at those who have represented [the people] over the decades” as discussed in the article
September 4, 2015

Math- Algebra
Jolie uses 2 tomatoes every day to prepare her salad. If n equals the number of tomatoes Jolie had before she made her salad and c equals the number of tomatoes left after the salad is made, which equation represents the number of tomatoes Jolie has after she made her salad?
September 4, 2015

Physics
Standing on the roof of a 62 m tall building, you throw a ball straight up with an initial speed of 14.5 m/s. If the ball misses the building on the way down, how long will it take from you threw the ball until it lands on the ground below? Give your answer in seconds and ...
September 4, 2015

Chemistry
Which of the following is a legitimate set of n, l, m(l), and m(s) quantum numbers? a. 4, -2, -1, 1/2 b. 4, 2, 3, 1/2 c. 4, 3, 0, 1 d. 4, 0, 0, -1/2 I don't think it's c because m(s) can only have +1/2 or -1/2 but I'm not sure how to figure out the others. Could ...
September 4, 2015

Math
At 8:00pm,the temps tire was16f by midnight ,the tempature had fallen by 19 f what was the tempature at midnight
September 4, 2015

Physics
Two cars are initially 10.5 km apart on a straight road. If the cars are moving toward each other, car 1 with a speed of 9.5 m/s and car 2 with a speed of 10.40 m/s, how many seconds will it take before the cars meet? Round your answers to three significant figures.
September 3, 2015

Physics
A
September 3, 2015

Physics
Two cars are initially 10.5 km apart on a straight road. If the cars are moving toward each other, car 1 with a speed of 9.5 m/s and car 2 with a speed of 10.40 m/s, how many seconds will it take before the cars meet?
September 3, 2015

Chemistry
Determine the pH of a solution made by mixing 50,00 mL of 0,100 M nitric acid with 100 mL of 0,200 M nitric acid
September 3, 2015

algebra
3 (a2 + b ) - 4 ( a2-b ) =
September 3, 2015

math
P(-5, 5) is a point on the terminal side of θ in standard position. What is the exact value of sec θ?
September 3, 2015

entrepreneurship 1
YES! thank you
September 3, 2015

entrepreneurship 1
If you would be an entrepreneur what business would u like to own? what would be some concepts or what you would do. i'm trying to create a company but i don't know what i should do whether cleaning service, construction service etc, so i'm wondering what you would...
September 3, 2015

ms.sue math
Which sum will be irrational? a. 3 + 2 b. √19 + 7/2 ****** c. 18/3 + 11/10000 d. –6 + (–3.251) Which product will be rational? A.17.12 * 33 ***** B. √ of 3 * √ of 9 C.4*pie D.- √ of 20 * 15 A whole number is added to a number with two digits ...
September 3, 2015

Syangempumelelo
For drugs
September 3, 2015

Geometry
A circle has a center at (3,5). The point (3,8) is on the circle. What is the circumference of the circle to the nearest tenth of a unit?
September 3, 2015

physics
B = 10 log (1)
September 3, 2015

physics
5 = 10 log (y/100)
September 2, 2015

Math
A mechanic can do a job in 2hr. It takes his assistant 3hr to do the same job how long would it take them to complet the job if they worked together?
September 2, 2015

Math (functions)
Sorry the condition that must be satisfied is f(f(x)) = x for all x
September 2, 2015

Math (functions)
If we have the function f(x) = (ax + b) / (cx + d) with a,b,c,d real numbers for which values of a,b,c,d is the following true f(f(x)) for all x I do a whole lot of algebra and get that that a,b,c,d must satisfy some conditions : c*(a+d) = 0 (d^2) - (a^2) = 0 -b *(a+b) = 0 ...
September 2, 2015

ms sue math help please or anyone
Which sum will be irrational? (1 point) a.3 + 2 b.start root 19 end root plus start fraction 7 over 2 end fraction c Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. d. –6 + (–3.251) Which product will be rational? (1 point...
September 2, 2015

Chemistry
A store owner would like to install a red illuminated sign. However, when she goes to purchase the sign, the list only includes the types of gases used, rather than the colors they produce. Which gas (H, Kr, He, Ne, Xe, or Ar) would you suggest she buy? In lay terms, explain ...
September 2, 2015

Chemistry
Write a brief discussion of the relationship between the atomic spectrum (number and position of the lines) and the electronic structure (shell model) of the gases. I know that the bigger the atom, less energy and so does that have something to do with this question?
September 2, 2015

French
Are these sentences correct? J’aime jouer au basket le dimanche à deux heures de l’après-midi. J’aime courir le mardi à six heures du soir. J’aime écrire le mercredi à dix heures du matin. J’aime jouer au tennis le ...
September 2, 2015

Chemistry
Classify each of the following as a heterogeneous mixture (M) or homogeneous mixture (S)or compound (C) or element (E). oxygen dissolved in water - S carbon mixed with sand - M apple juice - S vegetable soup -M sour, curdled milk -M steel -S hydrogen -E salt -E distilled water...
September 2, 2015

help please with math thanks
Which sum will be irrational? (1 point) a.3 + 2 b.start root 19 end root plus start fraction 7 over 2 end fraction c Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. d. –6 + (–3.251) Which product will be rational? (1 point...
September 2, 2015

Algebraic word problem damon or steve plz interven it urgent
i wil do dat,here is anoda.john is twice as old as his friend peter.peter is 5year older than alice.in 5years.john wil be three times as old as alice,how old is peter nw
September 2, 2015

math help ms sue please
2nd A 17 point Modifying Above 12 with bar times 33 B start root 3 end root times start root 9 end root C 4 times pi D negative start root 20 end root times 15
September 2, 2015

math help ms sue please
ima get to the others one min
September 2, 2015

math help ms sue please
1st a 3 + 2 b start root 19 end root plus start fraction 7 over 2 end fraction c Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. d –6 + (–3.251)
September 2, 2015

math help ms sue please
k will soon srry thankjs though
September 2, 2015

can anyone help me
can anyone help me
September 2, 2015

math help ms sue please
Which sum will be irrational? (1 point) 3 + 2 start root 19 end root plus start fraction 7 over 2 end fraction Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. –6 + (–3.251) Which product will be rational? (1 point) 17 ...
September 2, 2015

Math
I assume that since you put 680 m there, the bike must have traveled 680 meters in 50.4 seconds. However, it is supposed to be 680/50.4, so 680/50.4 is approximately 13.49 mps. Your answer is correct, but change your work.
September 2, 2015

Math
Post the entire question. The question isn't complete; we don't know all the measurements(numbers) that way.
September 2, 2015

math help please
Which sum will be irrational? (1 point) 3 + 2 start root 19 end root plus start fraction 7 over 2 end fraction Start Fraction 18 over 3 End Fraction plus Start Fraction 11 over ten thousand End Fraction. –6 + (–3.251) Which product will be rational? (1 point) 17 ...
September 2, 2015

Pre-Calc
Find the degree measures of the radians given. 1. pi/15 rad = 12 degs 2. -9pi/2 = -810 degs 3. 5pi/3 = 300 degs 4. -3pi/4 = -135 degs 5. pi/10 = 18 degs 6. -11pi/15 = -132 degs 7. In which quadrant is -11pi/9? = quadrant 2 8. Find one positive and one negative coterminal angle...
September 2, 2015

Math
Its B)112
September 2, 2015

Math
Which one do you think it is?
September 2, 2015

Pre-Calc
Is 300 an angle between 0 and 360 degrees that is coterminal with -780 degrees?
September 2, 2015

Social Studies
Ok, Thank You so much!!!!
September 2, 2015

Social Studies
The Dutch ??
September 2, 2015

Social Studies
Use the quote to answer the question: "The natives are too happy to share…… for a copper kettle and a few toys, as beads and hatchets, they will sell you a whole Country…." Which European power was able to purchase a valuable island with "a few ...
September 2, 2015

science
when kcn reacts with nh4cl to give
September 2, 2015

Reading
In which sentence is the word periscope used correctly? A. Excited about her finding, the scientist used a periscope to view the organisms in the water sample.**** B. On the night of the full moon, we used the periscope to look at the sky. C. Sitting behind the tall stone ...
September 2, 2015

life orientation grade 11
social and environmental responsibility (environmental issues that cause ill - health
September 1, 2015

math
For positive integers x and y, x+y=21. What is the smallest possible value of xy? a.10 b.20 c.38 d.54 e.110
September 1, 2015

MAT 221
If 6 pens cost d dollars, how much, in dollars does each cost.
September 1, 2015

Math
Would two coterminal angles for -13pi/6 be -25pi/6 and 11pi/6?
September 1, 2015

math
Three hundred ten million,seven hundred sixty three thousand one hundred thirty six. And the other is 20,000,000 + 400,000 + 80,000 + 4,000 + 100 + 60 + 3
September 1, 2015

algebra
How do you calculate the rate of 40 cars parked in 6 rows in a parking lot
September 1, 2015

Chemistry
Thank you for your help
September 1, 2015

Chemistry
ok so for wavelength I get 6.058x10^-7 then I divide: 2.998x10^8 / 6.058x10^-7 and get 4.949x10^14 Hz Is this correct?
September 1, 2015

Chemistry
Oh is it 1.816x10^2? I divide the speed of light by the wavelength: 2.998x10^8 / 1,650,763.73 I did the reverse the first time. Is this correct now?
September 1, 2015

Chemistry (Please check my answer)
I got 5.506x10^-3 when I divide the wavelength by the speed of light but I don't think that's right because Kr is an isotope. Could you please explain how this works too?
September 1, 2015

Chemistry
The meter has been defined as 1,650,763.73 wavelengths of the orange-red line of the emission spectrum of ^86Kr. Calculate the frequency of this radiation. In what proportion of the electromagnetic spectrum does the radiation fall?
September 1, 2015

Pre-Calculus
???
September 1, 2015

Pre-Calculus
focus at (-2,0) directrix the line x=2
September 1, 2015

Science
look, i just need one example you don't have to like that, and second this is on a test and just like you i don't have much time to be here all day
September 1, 2015

Science
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life.
September 1, 2015

Science
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life.
September 1, 2015

math
5,10,20,40,__,___,___,___
September 1, 2015

Algebra
Write a algebraic equation Ron is 10 years younger than maria. If maria is 'n' years old, how old is Ron
August 31, 2015

Chemistry
Suppose that 2.091x10^-18 J is absorbed by the electron of a hydrogen atom in the n=1 energy state. Describe the final energy state of the atom.
August 31, 2015

math
660/60 = ft/s
August 31, 2015

Chemistry
How much energy in joules is required to change the energy state of the H-atom electron from n=2 to n=3? from n=2 to n=4? from n=2 to infinity? Kind of confused on this concept. Could you please explain for me? Thanks
August 31, 2015

math
Cherish planted 12 flowers. She put the same number of flowers in each row. Draw a picture to show how she planted her flowers. Write an addition sentence to match your problem
August 31, 2015

Math
100 milk cartons were put out for breakfast. At the end of breakfast ony 27 remained what is the ratio of milk cartons taken to total milk cartons
August 31, 2015

Science
i did and there was no help from it
August 31, 2015

Science
1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly.*** Scientists use models of natural systems because they like to use art in science. ...
August 31, 2015

science
1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...
August 31, 2015

science
1. Why do scientists use models of natural systems? (1 point) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. Scientists use models of natural systems because they like to use art in science. ...
August 31, 2015

chem
12.16 mL of 0.205 M thiosulfate are required to reach the endpoint in the titration of 2.26 g of bleach sample
August 31, 2015

math accounts economics
what job can I get with these subjects
August 31, 2015

physic
A 1.2-kilogram basketball travelling at 7.5 meters per second hits the back of a 12-kilogram wagon and bounces off a 3.8 meters per second, sending wagon off in the original direction of travel of the ball. How fast is the wagon going?
August 31, 2015

Chemistry
If the H-atom electron in the n=1 state absorbs energy equivalent to 2.178x10^-18 J, what energy state will it occupy?
August 30, 2015

physics
A system does 137 J of work on its environment and gains 95.3 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment
August 30, 2015

Plus
569 times 12
August 30, 2015

physics
Water at 29.0 °C is sprayed onto 0.188 kg of molten gold at 1063 °C (its melting point). The water boils away, forming steam at 100.0 °C and leaving solid gold at 1063 °C. What is the minimum mass of water that must be used?
August 30, 2015

Calculus
Differentiate y=[(8x-x^6)/(x^3)]^(-4/5) My answer: [4x^3(16+3x^5)]/5 • fifth root of [(8x-x^6)/(x^3)] ^9
August 30, 2015

Calculus
Differentiate e^cos (x^2+1). My answer: -2xe^cos(x^2 +1) • sin(x^2+1)
August 30, 2015

geometry
ugh.. it didnt turn out to be boxes..
August 30, 2015

geometry
So On the first day of school I went to geometry and we did a review. My teacher had us work out this problem and I've never seen it before. Other kids were doing the problem and I was just there confused. I was embarrassed and didn't want to ask for help. Do any of ...
August 30, 2015

world history
why might a person say aristotle is the most modern of the ancient greek philosophers?
August 30, 2015

Calculus
Find the equation of the tangent line to f(x)=sec x - 2 cos x at (pi/3, 1).
August 30, 2015

Calculus
Differentiate. f(x)=(cos x)/x I got to here: (-x sin x - cos x)/x^2
August 30, 2015

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