# Posts by angela

Total # Posts: 1,718

Physics
Find the modulus direction cosin unit vector 1)4a-2b+3c, 2)a-7b+5c, 3)4a-3b+c.

physics113
find the modulus direction cosin unit vector 1)4a-2b+3c, 2)a-7b+5c, 3)4a-3b+c.

Physics
Find the modulus direction cosin unit (1)4a-2b+3c (2)a-7b+5c (3)4a-3b+c

Physics
Find the modulus direction cosin unit vector 1) 4a-2b+3c (2) a-7b+5c (3)4a-3b+c

philosophy
I am to write a two page dialogue between Socrates and a person. I was thinking about writing about domestic violence. What do you think about that subject. Should I use statistics and numbers regarding this issue.

math
in triangle ABC, AB = BC and ABC = 42. find ACB

Math
Do you think regular or irregular polygons are used more frequently in the design of objects and buildings in the world???

Chemistry
2C2H6+7O2=4CO2+6H2O how many moles of H2O are produced when a mixture of 0.427 moles of O2 and 0.150 moles of C2H6 is burned, iv already found moles of H2O for them separately.

university chemistry
many cola soft drinks contain caffeine and benzoic acid (pKa 4.2), explain how you would isolate separately pure caffeine and benzoic acid from an aqueous solution containing both compounds

university chemistry
this is for a chemistry laboratory experiment called "how much caffeine is there in instant coffee" What should be the pH of the aqueous layer to extract caffeine? There are three aqueous solutions that you may choose from. A. pH >14, using 2.5 M NaOH (aq) B. pH 1...

math
if my average is 88 percent. and if another grade is added, is it possible that my average would be the same

physics
Suppose that the pressure of an ideal gas mixture remains constant at 1700 Pa (1 Pa = 1 N/m2) and the temperature is increased from 400K to 800K. How much work does the gas do to the surroundings during expansion?

Applied Calculus
Correction: b=9 f(x)=-x^2 +4x+b if f(2)=13=-2^2+4(2)+b then f(2)=13=-4+8+b 17=8+b 9=b

Math
for x i got -3.57 is this correct?

Math
yes that is what i meant. i think i am still confused cause when i do that i got (7x+29)/(2x^2+6x-20) which i don't think is right

Math
Solve for x 5/x-2 + 2/x+5 = 4/x^2+3x-10 not sure i know how to do this

non permissable values
that makes much more sense thank you i couldn't figure it out so a restriction is someting that it cannot be divded or multiplied from right?

Math?
250

Statistics
You are given the sample mean and the sample standard deviation. Use this information to construct the 90% and the 95% confidence intervals for the population mean. Which interval is wider? If convenient, use the technology to construct the confidence intervals A random sample...

ENG1511
My cat likes to play

ENG1511
My cat is like to play

Math
what is the area of a rectangle with 6 in inlenth and 7inches wide.

Biochemistry
1. Given the following equation: Glycerol-3-phosphate glycerol + Pi Go’ = -9.7 kJ/mol At equilibrium the concentrations of both glycerol and inorganic phosphate are 1 mM. Under these conditions, calculate the final concentration of glycerol-3-phosphate. Remember to ...

bio(updated) Devron
Please help me with these questions. I have taken out some of the questions that i was a 100% sure of. I just need you to check for me the ones i'm not too postive about. I would really appreaciate the help! Thank you in advance. 1. The phenomenon of autocatalysis is ...

biology (confused)
Hi Will someone please check my answers. I went to biology-forums(dot)com and registered but i really don't know how to post my questions and i really need help (with the questions). Thanks in advance. 1. Which process involves both passive and active transport? a.)...

biology help!!
Please check my answers. I did my best. 1. Which process involves both passive and active transport? a.)facilitated diffusion<---- b.)cotransport c.)bulk transport d.)transport through electrogenic pumps e.)osmosis 2. How does the liver in a healthy body respond to elevated...

biology
Please check my answers. I did my best. 1. Which process involves both passive and active transport? a.)facilitated diffusion<---- b.)cotransport c.)bulk transport d.)transport through electrogenic pumps e.)osmosis 2. How does the liver in a healthy body respond to elevated...

biology
1. The phenomenon of autocatalysis is involved in a positive feedback loop that activates certain digestive enzymes. Which likely results when the digestive enzymes are activated? a.)the suppression of other enzymes b.)additional enzyme activation c.)a chemical that blocks ...

biology
Thank you soo much. Will you be willing to help me with some more questions?

biology
Will someone please check my answers? 1. Which process results in an individual inheriting the incorrect number of chromosomes? a.)mutation b.)nondisjunction<-- c.)segregation error d.)duplication error e.)linkage 2. Which data in Hershey and Chase's experiment ...

philosophy
I am to write a eight to ten page research paper based upon a current event/ pressing social issue that is relevant in my community. I want to write about crime but crime is not very prevalent in my town until recently we had like 4 murders in the last month. Do you think I ...

philosophy
I am suppose to identify some of the features and values you associate with a just society. I want to write about healthcare but i don't know where to start can someone please help.

CHEMISTRY URGENT!
how do yu se up the equation for this Q.??

philosophy
I am suppose to write a paper on ethical dilemma.I was thinking about writing about a woman who works in retail sales and a customer gives her to much change. I was thinking that would be an ethical dilemma. I was wondering what anybody thinks. I really don't know where to...

American History
What, in your estimation, were the key principles of the Progressive Movement?

Abbott was orphaned at the age of five. For the next fifteen years his material needs were met by his Uncle Barton. On his 13th birthday, Abbot wrote Uncle Barton and promes to pay him \$100 per mont as long as his Uncle lived. Abbott nver made any payments. Uncle Barton died ...

statistics
2. A test measuring basic math skills in adults is normally distributed, with mean = 20 and standard deviation = 7. Calculate the z score and T score for each of the following test scores: - X = 11

Chemistry
At constant volume, the heat combustion of a particular compound is -3447.0 KJ/mol. When 1.205 g of this compound (molar mass = 119.94 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 5.007 degrees C. What is the heat...

Chemistry
Consider the molecular level representation of a gas There are: (a picture) 6 blue dots 5 orange dots 3 green dots (i think they are the diatomic one, because it is pairs) If the partial pressure of the diatomic gas is .750, what is the total temperature? I am totally lost, ...

Statistics
Z= x-u/o So, 296-300/3 = -.77 Look at a standard normal distribution table .2794 is the value from the table. If you draw the curve, you will know that the area is to the left. So, you subtract: .5000- .2794 =.2206 is the probability. I am not sure about the second part.

Chemistry
If the heat from burning 6.000 g of C6H6 2C6H6(l) + 15O2(g) -> 12CO2(g) + 6H2O(l) + 6542 kJ is added to 5691 g of water at 21 °C, what is the final temperature of the water? Please tell me what I am doing wrong: 293,551= 5691*4.2*(Tf-21C) 293551= 23902.2Tf - 50946.2 ...

grammar
What is the simple subject in this sentence Who cares if she's in 3rd grade and I'm just in 1st.

statistics
Give and interpret the 95% confidence interval for the hours of sleep a student gets. (7,8,4,5,8,10,7,8,5,6,7,4,7,8,9,8,7,6,7,8)

Algebra
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 172 and a variance of 9. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single, randomly selected piece ...

Math
What is the value of n in the equation (2/3)n =(4/9)

computers
what part of a presentation slowws you to add charecter data?

math
how do you divide 1.0 divided by 0.02

math
26997.18 = PV(1.10)^10 26997.18/(1.10)^10 = PV 26997.18/2.59374 = PV 10408.59 =PV

math
(1+r)^365 =(1.07) 1+r = 1.07^1/365 1+r =1.00018538 r = 0.0018538 r = .185% daily (1+r)^12 = 1.06 1+r = (1.06)^1/12 1+r = 1.004867551 r = 0.004867551 r = .486% monthly

Math
(1+r)^12 = 1.03 1+r = (1.03)^1/12 1+r = 1.00246627 r = 0.00246627 r % = .247 % monthly

Physics
A roller-coaster car speeds down a hill past point A where R1 = 10.4 m and then rolls up a hill past point B where R2 = 15.6 m, as shown below. R1 and 2 are radii (a) The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car of 2.05 multiplied ...

English
How can I make this sentence better for my objective on my resume. To obtain an administrative assistant position where my professional skills will be used to the fullest.

Physics
A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The wood block is initially at rest on a 1.4 m tall post. After the collision, the wood block and dart land 3.1 m from the base of the post. Find the initial speed of the dart.

Physics
A 750 N student stands in the middle of a frozen pond having a radius of 5.4 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 2.0 kg physics textbook horizontally toward the north ...

Physics
A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The wood block is initially at rest on a 1.4 m tall post. After the collision, the wood block and dart land 3.1 m from the base of the post. Find the initial speed of the dart.

texas southern university
A quantity of gas in a piston cylinder has a volume of 0.544 m3 and a pressure of 200 Pa. The piston compresses the gas to 0.126 m3 in an isothermal (constant-temperature) process. What is the final pressure of the gas? ??__Pa

texas southern university
A periodic wave has a frequency of 8.9 Hz. What is the wave period? ??__s

Physics
A railroad car with a mass of 1.86 104 kg moving at 2.80 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.40 m/s. (a) What is the speed of the three joined cars after the ...

Physics
oh nvm

Physics
are you sure the 0.138 shouldn't be .0138?? and the answer be 1.7e-6??

Physics
A 5.9 g coin sliding to the right at 27.6 cm/s makes an elastic head-on collision with a 17.7 g coin that is initially at rest. After the collision, the 5.9 g coin moves to the left at 13.8 cm/s. (a) Find the final velocity of the other coin. (b) Find the amount of kinetic ...

Physics
Thanks Elena!! CASEY, you da finest.

Physics
A 1.08 kg skateboard is coasting along the pavement at a speed of 4.60 m/s when a 1.19 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination?

French 2
Which is an example of a superlative sentence? Answer Le français est fantastique. Le français est plus fantastique que l'anglais. Le français est la plus fantastique de tous les langues.

Physics
A 0.17 kg baseball moving at +20.80 m/s is slowed to a stop by a catcher who exerts a constant force of -376 N. How long does it take this force to stop the ball? How far does the ball travel before stopping?

statistics
random sample of n = 16 scores is selected from a normal distribution with a mean of μ = 50 and standard deviation of σ = 10. a. what is the probability that the sample mean will have a value between 45 and 55? b. what is the probability that the sample mean will ...

Physics
Those were all wrong, I don't get it.

Physics
A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.81 m from the end of the track after falling a vertical distance h2 = 1.03 m from the end of the track. (a) At what...

Physics
Thank you!!

Physics
Starting from rest, a 11.50 kg suitcase slides 3.18 m down a frictionless ramp inclined at 40° from the floor. The suitcase then slides an additional 5.22 m along the floor before coming to a stop. (a) Determine the suitcase's speed at the bottom of the ramp. (b) ...

Physics
A skier of mass 74.5 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 55 m up a 31° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?

Physics
A 0.230 kg block on a vertical spring with spring constant of 4.25e3 N/m is pushed downward, compressing the spring 0.048 m. When released, the block leaves the spring and travels upward vertically. How high does it rise above the point of release?

Econ
Just a suggestion: Since there is a price floor on wheat (meaning that wheat cannot be sold under a certain price), wheat would be more expensive. In turn the people who make Healthy Wheat Cookies would produce less and would raise the price of Healthy Wheat Cookies, to make ...

random math queastion
√x^2+2 Is this possible as is?

Physics
An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

Physics
Nevermind!! I got it! Thank you so much

Physics
I got 571, but it says it's wrong!!

Physics
An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

Calculus
when I plug in the ordered pair (.25, 2)I get a zero in the denominator, was I doing that wrong?

Calculus
arcsinxy = 2/3 arctan4x find dy/dx at the point (1/4, 2)

math
name a possible set of scores for 15 students that would result in an average of 66%

colleGe math
y=-2|x| actually I'm sorry I left some of the details out. It says to let x=-3,-2,-1,0,1,2 and 3. Not sure what to make of this..

colleGe math
y=-2|-3| was the intended equation

colleGe math
y=-2|x| Will someone please explain how I'm supposed to graph this?

collEge math
x^3-27

colLege math
(2x-1)(x^2-4x+3)

coLlege math
√6x * √3x^2

coLlege math
It is done like this. :√6x

coLlege math
√6x*√3x^2

cOllege math
Any chance for help on this?

cOllege math
14x^2+5-[7(x^2-2)+4]

College math
(-30a^14b^8/10a^17b^-2)totally lost on me??

I need help in 8. Please help. the question itself is worth 50 points. Yeah it sounds crazy but it is my mid term exam which is 25 or 50 points each but is worth only 300 points.

Statistics
AJ DAVIS is a department store chain, which has many credit customers and wants to find out more information about these customers. A sample of 50 credit customers is selected with data collected on the following five variables: LOCATION (Rural, Urban, Suburban) INCOME (in \$1,...

finance
Knight has a property tax base with an appraised value consisting of \$142,000,000 of taxable real property and \$78,000,000 of taxable personal property. The assessment ratio is 50%. Exemptions for the elderly reduce assessed value by \$3,000,000. The city has a planned budget ...

Physics
40 miles per hour

Finance
Mr. Brown is in the 10% federal income tax bracket and wants to invest \$8,000 in interest-earning assets. Mr. Black is in the 35% bracket and wants to invest \$15,000. The current rate on a typical high-quality tax-exempt municipal bond is 5% and on a similar quality corporate ...

math
Can you write it in a sentence

math
Would this be a arithmetic sequence

math
how do you put it in a sequence

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