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October 24, 2014

Posts by tina


Total # Posts: 1,007

Physics
A mass of 18 kg is being pushed up a frictionless incline with a constant force of 20 Newtons directed parallel to the incline, up the incline. At the top of the incline the mass is moving at 23 m/s up the incline. If the angle of inclination is 58 degrees and the height (not ...
October 4, 2011

physics
3.5
October 4, 2011

algebra
The length of a rectangle is 3x + 4/4x^2-4 and and the width is8x − 8/6 the area of the rectangle is a)1 b)2 c)x+1/x-1 d)4 please help!
October 2, 2011

Physics 1
A mass of 18 kg is being pushed up a frictionless incline with a constant force of 20 Newtons directed parallel to the incline, up the incline. At the top of the incline the mass is moving at 23 m/s up the incline. If the angle of inclination is 58 degrees and the height (not ...
October 1, 2011

us history
why dont more textbooks have readings on blacks resisting slavery?
September 18, 2011

science
A race car travels northward on a straight, level track at a constant speed travels 0.756 km in 18.0 s. The return trip over the same track is made in 23.0 s
September 18, 2011

history
why did the europeans say the indians were uncivilized ?
September 18, 2011

chemistry
A doctor has ordered that a patient be given 11 of glucose, which is available in a concentration of 60.00 glucose/1000.0 of solution. What volume of solution should be given to the patient?
September 18, 2011

math
use the digits 0,2,4,6,8 exactly once to form a 3-digit and 2-digit NEGATIVE intfer that will give you the LEAST possible sum when the two intergers are added together.
September 17, 2011

geometry
Point M is the midpoint of line JK. If JM is 6x-7 and MK is 2x+3 what is JK?
September 14, 2011

AP Chemistry
A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. ...
September 13, 2011

AP Chemistry
In the reaction below, 23 g of H2S with excess O2 produced 9 g of sulfur. ? H2S + ? O2 → ? S + ? H2O . What is the percent yield of sulfur? Answer in units of %
September 13, 2011

AP Chemistry
For the reaction ? Al + ? CuSO4 ↽⇀? Al2(SO4)3+? Cu a maximum of how many moles of Al2(SO4)3 could be formed from 5.49 mol of Al and 4.09 mol of CuSO4? Answer in units of mol
September 13, 2011

Chemistry
Not sure of my answers, pls help me out. I have to indicate the kinds of intermolecular forces that occur between the solute and the solvent in which the molecule is most soluble. a) glucose b) naphthalene c) dimethyl ether d) alanine (an amino acid)
September 9, 2011

math
tom sells 15% of 180 acres to dan for 1,100 an acre .the motrgage finace fees dan must pay are 3% of the total price.how much are the fees
August 24, 2011

Writing
can someone look at my previous post?
August 21, 2011

Writing
Ms. Sue im start all over but I dont know how to start my body similaritie paragraph off.
August 21, 2011

Writing
can someone proofread my writing? Ms.Sue preferably?
August 21, 2011

Writing
Conflict? That’s the word defines me. Why? I’m always having and issue with someone and it leads to fussing back and forth at each other. In the story, “Interlopers” by Saki and in a conflict I had with my sister we had a lot of similarities and differences...
August 21, 2011

Phi103
Answers to phi 103 week 5 test
August 15, 2011

Algebra
solev the compound inequality 2x-9/8<-7 or 2x-9/8>6
August 15, 2011

Science
According to Peter Saundry there is no true universal code of ethics because standards of conduct vary from place-to-place and time to time. True or false
August 12, 2011

history
can you please help me writing as i have ready this but not able to make out the specific reasons which lead to shaping Europe
August 10, 2011

history
how did the Iberian Reconquista figure in shaping modern Europe [Europe after 1500]?
August 10, 2011

Real Estate Law
For the most part, mortgage loans are made by __________ institutions. (Points: 5) a. lending b. personal c. private 4. government I think its A
August 10, 2011

history
what factors enabled the Europeans to quickly assert their hegemony over indigenous peoples in the Americas and to compel Eastern potentates to yield to European commercial demands or to accept Western political control?
August 10, 2011

history
What factors led Atlantic community states to seek ways to access Asian markets by avoiding the Mediterranean late in the 15th and early in the 16th-centuries?
August 10, 2011

Chemistry
A gas at a temperature of 95 degrees C occupies a volume of 159 mL. Assuming constant pressure, determine the volume at 15 degrees C.
August 2, 2011

phi 103
a weak inductive argument
July 29, 2011

statistics
Suppose the following summary statistics are obtained from a large group of individuals:X =52.0, Sx= 8.7, Y =147.3, Sy = 16.9. Dorothy receives an Xscore of 52. What is her predicted Y score if r = o?
July 27, 2011

English
Are the answers above correct? Please help.
July 23, 2011

English
2.run-on sentence correction: That brand of car goes very fast; which is why many people want them. 3.verb tense Grammar quizzes can be tough. There is a lot to learn, and remember. I find that it gets easier with practice. 4.subject verb agreement Can I call you back? I am ...
July 23, 2011

English
Each of the follwing sentences need to be re-written so they are grammatically correct, also they each have one grammaitical error such as subject-verb agrrement, run on sentence, verb form and tense or sentence fragment. please help 1. The bank robber escaped from the bank. ...
July 23, 2011

English
Can you tell me the grammatical error on the following sentences eg:subject-verb agrrement, run on sentence, verb form and tense, or sentence fragment. Also These sentences need to be re-written. 1. They is both happy. 2. at 3PM I will be feeding the ducks. At the park.. 3. ...
July 23, 2011

MATH, PLEASE HELP!
Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get an answer, so confused...
July 22, 2011

Math
Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get an answer, so confused...
July 22, 2011

Physics
Why is there a centripetal acceleration if the velocity does not increase? a. Velocity changes direction as you move around the circle, causing a Δv b. Velocity in a circle is always constant c. Because gravity will hold any object in a circular motion I am almost sure ...
July 21, 2011

physics
What are some examples of real resistors used in circuits?
July 19, 2011

mechanics
what is the kinetic energy of an object that has a mass of 20nkilograms and a speed of 2.8 m/s
July 18, 2011

Physics
Question: When a balloon is rubbed with fur, it becomes negatively charged. Explain why?
July 17, 2011

Math
A person standing near the edge of a cliff 120 feet above a lake throws a rock upward with an initial speed of 40 feet per second. The height of the rock above the lake at the bottom of the cliff is a function of time and is described by the function H(t) = –16t2 + 40t + ...
July 16, 2011

chemistry
How could I determine if one rock is denser than another rock?
July 14, 2011

physics
A ray of light enters the top of a glass of water at an angle of 36 degrees with the vertical. What is the angle between the refracted ray and vertical? The answer is 26 degrees but I keep getting 22 degrees. I used snell's law: n1sinθ1=n2sinθ2 for n1 I thought ...
July 13, 2011

Physics
A string with a linear density of 0.035 kg/m and a mass of 0.014 kg is clamped at both ends. Under what tension in the string will it have a fundamental frequency of 100 Hz? The correct answer is 270N but I don't know how to get there. Here are some of the equations we can...
July 13, 2011

CHEMISTRY
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?
July 13, 2011

Med terms
Andrea is not 100% right. left lower lobe = lower left lobe (LLL)
July 12, 2011

Physics
Question: Two strings at different lengths and linear densities are joined together. They are stretched so that the tension in each string is 190.0 N. The free ends are fixed in place. Find the lowest frequency that permits standing waves in both strings with a node at the ...
July 11, 2011

Physics
1. A person driving to the right and honks their horn. An observer standing behind the car, opposite its direction of motion would hear...(choose one) a. Higher Pitch b. Lower Pitch c. Same pitch as the driver please explain how you got to the answer
July 10, 2011

economics
At an initial point on the aggregate demand curve, the price level is 100, and real to GDP is $15trillion. After the price level rises to 110, however, there is an upward movement along the aggregate demand curve, and real GDP declines to $14 trillion. If total autonomous ...
July 9, 2011

economics
Suppose that Congress enacts a lump-sum tax cut of $750 billion. The marginal propensity to consume is equal to .075. Assuming that Ricardian equivalence holds true, what is the effect on equilibrium real GDP? On saving?
July 9, 2011

math
How did you get that answer? I can't come up with the equations, I got them but I didn't get that answer
July 8, 2011

math
A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A and B can be produced...
July 8, 2011

Micoreconomics
In recent years, the Internet auction firm eBay has sougth to make its auction technology the favorite of software programmers, and it has begun licensing its technology to other Web sites. The company's managers have pulicly stated that their goal is for eBay's ...
July 8, 2011

Physics
I need a complete list all the doppler effect equations for a beginner physics class. Here is a sample questions so you know the level Question: Two trains on separate tracks move toward one another. Train #1 has a speed of 130 km/hr and train #2 a speed of 90km/hr. Train 2 ...
July 7, 2011

MATH
10(10)+ 5(10)
July 7, 2011

Algebra
Can you help me solve this please? 31%=1-600/Q Answer: 869.6 But in don't know how to get to the answer
July 7, 2011

Physics
1. Water with a mass of 2kg is held at constant volume in a pressure cooker. 10,000 J of energy is added from the heater inside the pressure cooker. The container is not terribly well insulated, so the container leaks 2000 J of energy to the surrounding air. What is the total ...
July 6, 2011

algebra
Determine whether 14 is a solution of the equation 6(x - 2)= 70
July 6, 2011

Physics
1. How much energy is required to be removed to lower the temperature of a bottle of drinking water (280mL) from 22°C to 4°C? The density of water is 1.0g/mL here are the equations we can use: (-m1)(C1)(ΔT1)=(m2)(C2)(ΔT2) Q=mcΔT Q=mL There might be ...
July 5, 2011

chemistry
A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.
July 5, 2011

Education
Can you explain why teachers who wish to promote a developmentally appropriate science education program must be knowledgeable about children's level of development.
July 2, 2011

Education
Why is science an integral part of the play-centered curriculum?
July 2, 2011

Education
What is the goal of early childhood science education?
July 2, 2011

Education
What is an example of play that relates to a curriculum standard in mathematics?
July 2, 2011

physics
The momentum before and after the explosion is the same. Since there are no external forces acting on the satellite, the law of conservation of momentum states that momentum will not change. Basically the total momentum of the satellite before the explosion is equal to the ...
June 28, 2011

physics
The momentum of a car traveling east is different from the momentum of an identical car traveling west at the same speed. Momentum is a measure that includes both the mass and the velocity of an object. The two cars have identical mass (I am assuming they have identical mass ...
June 28, 2011

Physics Equation
What is the equation for total energy (TE)?
June 28, 2011

Physics
Did you get 22/2 because it said halfway?
June 28, 2011

Physics
1. if a 0.05kg coin is hanging from 22m above the ground: a. If you drop it, how fast will the coin be moving halfway to the ground? b. How fast will it be moving just before it hits the ground? If you could point me the right direction with equations that would be great. I ...
June 28, 2011

Physics
What makes you think I just want answers. I am here to learn and simply showing me how to set up the problem is enough. Your answer was helpful but you don't have to be mean.
June 28, 2011

Physics
A 30kg block sits on a ramp, with Θ=47. The ramp is 13m off the ground at the tallest point. If the block slides in the presence of friction, with μ=0.1, how fast is the block moving when it hits the bottom of the ramp? Please indicate which equation you use, what ...
June 28, 2011

Physics
If you could just post the equations that would be helpful in this problem that would be great. I am sure I can figure it out form there. Also does TE stand for total energy?
June 28, 2011

Physics
A winch with a power rating of 400 W lifts a 200kg object off the ground at a constant velocity for 17 seconds. How high was the object lifted? What is the object total energy? Please indicate which equation you use, what variable corresponds to each number, and how you got ...
June 28, 2011

Physics
Question: A car is on a ramp 100m from the bottom of the ramp (angle of incline=30 degrees): a. If the potential energy of the car is 80902 J, how much does the car weigh? b. What is the KE half way down the ramp? c. What speed is the car moving at the bottom of the ramp? ...
June 27, 2011

Physics
Question: A 0.200kg ball moves with a velocity of 0.3m/s. It collides with a second ball that is at rest and has a mass of 0.1kg. After the collision, the velocity of 0.1kg ball is 0.26m/s. What is the new velocity of the first ball. Please indicate which equation you use, ...
June 26, 2011

Physics
1. A 0.75kg ball traveling horizontally to the right at 20m/s. A player strikes the ball and causes it to move in the opposite direction with a velocity of 24m/s. a. What impulse was delivered by the player to the ball? b. If this took 0.3 seconds to occur, What force must be ...
June 26, 2011

Physics
A cart of apples is rolling toward you in the street. It’s velocity is 2m/s. Its total mass is 50kg. You are running toward the cart of apples (hint your velocity is opposite direction of the carts velocity). You have a mass of 45kg. What velocity must you be running at ...
June 26, 2011

Physics
1. A 38kg object is traveling down the ramp and experiences a frictional force of 180N. Calculate the angle of incline and the friction coefficient between the two surfaces. Answers: μ(mu)=0.55 Θ=28.9 degrees But please show work and all equations/variables used.
June 23, 2011

physics
How can I find kinetic friction (Fk) without mu? I know the normal force which is 201N. The mass of the object is 30kg. This is the full questions of it helps. I just don't understand how to find kinetic friction 1. If a 30kg object experiences a normal force of 210N when ...
June 22, 2011

Physics
1. If a 30kg object experiences a normal force of 210N when traveling down a ramp, what is the angle of incline? Also, calculate the force of friction and the coefficient of friction. Answers: μ(mu)=0.98 Θ=44.5 degrees But please show work and all equations/variables...
June 22, 2011

Physics
1. If a 500N person is skiing on a slope with an angle of incline of 67 degrees and there was a friction coefficient of 0.19, determine the person’s acceleration rate. If starting from rest, what is the overall displacement after 30 seconds?
June 22, 2011

chemistry
Take a ruler and measure the height of the textbook three times. Record the three measurements, and discuss the uncertainty in your measurements. Remember to report the smallest markings on your ruler.
June 20, 2011

Chemistry
Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...
June 16, 2011

Chemistry
Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...
June 16, 2011

health
How might the increase in medical technology have a negative effect on communication among providers? Provide at least two examples. Are there any positive effects of increased technology on communication among providers? Why or why not? How does the increase in medical ...
June 9, 2011

health
How might the increase in medical technology have a negative effect on communication among providers? Provide at least two examples. Are there any positive effects of increased technology on communication among providers? Why or why not? How does the increase in medical ...
June 9, 2011

com
Can you please identify the adverbs and adjectives in the following paragraph. Having credit cards could get some people into serious debt. I had a credit card at one time. I learned the hard way about using credit cards. I was using it for anything and everything that I ...
May 30, 2011

Calculus
Differentiate the following function? g(x)=x^2=1/x^2-1
May 29, 2011

Algebra II
Translate this equasion 2 units left and 4 units up: 9x^2+ 3x+ 10= 16y^2+ 154+ 3x please show me all of the steps. thank you
May 23, 2011

Chemistry
A 15.5 mL sample of 0.215 M KOH solution requires 21.2 mL of acetic acid in a titration experiment. Calculate the molarity of the acetic acid solution. Please show all steps, I don't understand this.
May 23, 2011

Chemistry
If 15.omL of 0.0250 M aqueous H2SO4 is required to neutralize 10.0 mL of aqueous solution of KOH, what is the molarity of the KOH solution?
May 23, 2011

algebra
Determine whether -4 is a solution of the inequality x>-4 Is -4 a solution?
May 20, 2011

Management
The business I choose to do my SWOT Analysis on is Infinite learning Childcare Center. The five resources I used to obtain my information on the business strength, weakness, opportunities, and threats, are parent surveys, the company’s handbook, employee’s, ODJFS web...
May 17, 2011

General - URGENT
I have found the cartoon on a website, but not the original details. It says LEV HAUS, do not trust the Kulak he is the enemy of socialism in the caption.
May 14, 2011

General - URGENT
Hi Theres this cartoon, it says: Kulak je nejzavilejsi nepritel socialismu. It shows a small fat man lifting up the cheek of a taller man as if he likes him. The shadow shows the fat man chocking the thin man and instead of a torch/candle behind him he is carrying a knife ...
May 14, 2011

Reseach - source evaluation HELP
Okay, I'll try contacting them. When I research George Beers I keep getting a hockey player or a dude who was dead before Stalin was alive!
May 14, 2011

english
huh? By the South African revolution do you mean the overthrow of the aprtheid regime? Explain 'customs'. Is it border control or cultural activities?
May 8, 2011

Easy maths question
Thanks!
May 8, 2011

Easy maths question
Hey How do I convert 1224.78m squared into mm squared?
May 8, 2011

Current Events
Hey! Kayz, so regarding the stance 'that the US should remove political, social and economic support from dictatorships'. So far I'm thinking of adapting the sanctions on South Africa during apartheid for this. I'm also thinking of looking at current ...
May 8, 2011

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