Thursday
November 27, 2014

Posts by angela


Total # Posts: 1,396

College Physics
A car initially traveling northeast (45° N of E) at 28.3 m/s takes 6.0 s to turn to the east. After the turn, the car is traveling due east at 20.0 m/s. What is the value and direction of the change in velocity?
September 19, 2010

physics
32 kg box sitting on a ramp has a coefficent of 0.21. If the ramp is raised, at what angle will the box begin slipping?
September 19, 2010

physics
A superball of mass 0.15 kg drops 2.3 m to the floor and rebounds perfectly. It is in contact with the floor for 0.012 s. What is the average force during the impact?
September 17, 2010

physics
you drive 2.0 km east and then 1.0 km northeast. What is your total displacement from the starting point?
September 17, 2010

Physics
At the instant a traffic light turns green, a car starts with a constant acceleration of 1.8 m/s(squared). At the same instant, a truck travelling at a constant velocity of 8.5 m/s passes the car. How far beyond the starting point will the car catch up to the truck?
September 15, 2010

Physics
^acceleration is 9.8 as well. and wheres 343 from ?
September 15, 2010

Physics
A rock is dropped from a sea cliff 400m high.If the speed of sound is a constant 330 m/s, how long after the rock is dropped is the sound of the splash heard at the top of the cliff?
September 15, 2010

Physics
make a parobala, find the highest point find the time for the whole thing, then dive the time in half. hope that kind of helped !
September 15, 2010

Chemistry
I need serious help with 3 different chemistry problems: 1. If coal is assumed to be all carbon, carbon has a molecular weight of 12 lb-mass/lb-mol, and oxgyen (diatomic) has a molecular weight of 32 lb-mass/lb-mol, how much carbon dioxide (lb-mass/day) is produced in 171.4 lb...
September 12, 2010

college physics
A 12 kg rock sits quietly on a spring, having displaced the end of the spring 0.12 m. What is the spring constant?
September 12, 2010

college physics
A diver begins a high dive with an angular velocity of 6.3 rad/s. By tucking himself into a ball, he decreases his moment of inertia by a factor of 9.0. What is his new angular speed?
September 12, 2010

college physics
got it. thanks
September 12, 2010

college physics
The plastic in a DVD disk will begin to deform at rotations faster than 10,000 revolutions per minute. How many radians per second is that? If the disk has a radius of 0.06 m, what is the centripetal acceleration at the edge?
September 12, 2010

physics
thank you!
September 11, 2010

college
100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop?
September 11, 2010

college physics
Would you need to know the mass to solve this problem?
September 11, 2010

3rd grade
3860
September 9, 2010

pre algebra 7th grade
Please explain this problem (r.r) (r.r)
September 7, 2010

STATISTICS
Use the random-number table to simulate the outcomes of tossing a quarter 25 times. Assume that the quarter is balanced (i.e., fair). (Start at row 1, and let 0, 1, 2, 3, 4 indicate heads and 5, 6, 7, 8, 9 indicate tails. Enter H for heads and T for tails, and enter your ...
September 6, 2010

spanish
Identifica las contribuciones politicas de los Mexicoamericanos en los Estados Unidos. (2 ejemplos)
September 2, 2010

APA Citations
Can someone show me an example of and APA Format citation from an internet source when no author name is given.
August 31, 2010

poetry
Is this a good Poem for a senior in creative writing? The topic is "The Power of Words" Words are one of the most powerful things in our lives. They can bring out many different feelings. Excited, sad, happy, or mad. Words put together can create a story. true or ...
August 22, 2010

chemistry
A stock solution's hypochlorite activity was determined as follows: . - 2.00g of liquid sodium hypochlorite (NaOCl) was weighed into a flask and diluted with 50mL deionized water.10mL of 10% sulfuric acid and 10mL of 10% potasssium iodide were added, followed by titration ...
August 4, 2010

Chemistry-iodometric titration
In an iodometric titration, excess potassium iodide solution (KI) is added to the sample.Analyte such as chlorine liberates iodine from KI under acidic condition. Liberated iodine is titrated against standard sodium thiosulphate. The concentration of analyte in the sample is ...
August 4, 2010

Repost-Chemistry -please help
Hi, sorry I missed out something. The titrant used was 0.100M Sodium thoiosulphate.Do I have to consider its concentration in the calculations? Thanks a lot. Posted by angela on Tuesday, August 3, 2010 at 6:58pm. Please help to determine the (%w/w) benzoyl peroxide (C14H20O4) ...
August 3, 2010

Chemistry - please help
Please help to determine the (%w/w) benzoyl peroxide (C14H20O4) in a sample. Procedure: 2.500g of sample was dissolved in 75ml dimethylformamide and diluted to 100.0ml with the same solvent. (Solution T). To 5.0ml of Solution T, 20ml of acetone and 3ml of a 500g/l solution of ...
August 3, 2010

Elementary Stats
A recent survey found that 70% of all adults over 50 wear glasses for driving. In a random sample of 10 adults over 50, what is the probability that exactly eight wear glasses?
July 28, 2010

com 155
I don't know
July 28, 2010

Sin 4x
a.)Find sin 4x if tan=0.6 b.) Solve: sinxsinx/2=1-cosx(0<x<2*pie
July 26, 2010

ellipse
Find the coordinates of the vertex and focus of the ellipse 9x Square+ 4y square=0.09
July 26, 2010

math
find the equation of line y=x+1 under each of the following transformations (a) (x,Y)-(x+3,Y+5) (b) reflections across the x-axis (c) reflection across the y-axis (d) half turn about origin
July 25, 2010

Math
Describe objects that have each of the following type of symmetry (a) line (b) point (c)plane (d) 90% rotational
July 25, 2010

Stress Management Techniques
U ALL ARE ALL WRONG. AND HATE LIERS . DONT POST AND MAKE IT SEEM LIKE ITS ALL THE TRUTH CAUSE NO OF THEM WAS RIGHT
July 3, 2010

Stress Management Techniques
I am taking the same course and I just made a 30 using these answers thanks
July 3, 2010

Statistics
The population standard deviation is estimated to be $300. If a 98% confidence interval is used and an interval of +/-$75 is desired, how many cardholders should be sampled?
July 2, 2010

Math
P/3 - 3P/8 =
June 30, 2010

Statistics
What does it mean when a researcher chooses the cutoff in a comparison distribution to be .01? a. It means that to reject the null hypothesis, the result must be higher than a z score of .01 b. It means that to reject the null hypothesis there must be less than a 1% chance ...
June 10, 2010

math
what is the measure, in radians, of a central angle formed by cutting a circular pizza into 12 equal wedge shaped pieces?
June 10, 2010

Psychology 210
children tend to organize their words into male and female categories. This best illustrates their use of? a-the pruning process b- behavior genetics c-gender schemas d-the male answer syndrome
June 9, 2010

Chemistry
What is the H3O+ in a solution that contains 1.48 g HNO3 in 0.560 L of solution?
June 7, 2010

Chemistry
Calculate the OH- of each aqueous solution aspirin, 5.9×10−4 M milk of magnesia, 1.5×10−9 M
June 7, 2010

algebra2
what is percent notation
June 4, 2010

algebra2
find percent notation 15/25
June 4, 2010

adult education
it delayed until the following year $10 million of maintenance on city highways. how would you require that it be accounted for and reported.
June 3, 2010

Operational Management
I just want to make sure I am on the right track with my numbers. I can do the writing part of the assignment with no problem. Math is just not my strong suit.
May 29, 2010

Operational Management
I think alternative B is the best because the total cost is $1,266,900 compared to Alternative A at $1,394,620. B has more people but less money spent
May 29, 2010

Operational Management
I need help with the cost benefit matrix. This is what I have so far.... Alternative 1 Number of employees 6 Hourly salary $43 Number of claims per year 0.3 Capital Invested $1,300,000 $61,920 labor cost per month/ 30 days $32,700 claims per year based on $109,000 per claim ...
May 29, 2010

Operational Management
Taylor Inc. manufactures widgets. There is a particular assembly line for Widget X. This assembly line includes the assembly of various raw materials, subassemblies, and packing of the finished widget. Currently, approximately 27% of the total labor time is utilized in walking...
May 29, 2010

Anatomy & Physiology 1
Ummm.... There are a few that are wrong 14. A 72-year-old man is diagnosed with a 7cm primary tumor in his colon, which has spread to the liver. Which of the following features indicates that the tumor is malignant? A- the patient's advanced age B- the location of the ...
May 27, 2010

1st grade/english
wich word is correct fill the pot or fill the pop
May 26, 2010

math
a 7 digit phone number has a 3 digit prefix followed by 4 digits.how many different phone numbers are possible??
May 13, 2010

SCIENCE
how to make electrohemical cell with iron and aluminium foil? I should make that at home and at school teacher will give me acid or something to put metals in that. And i should know how to conect that with wires and make the bulb light - so i should conect that and make ...
April 26, 2010

Science ( chemistry )
PLEASE I NEED HELP IT IS URGENT !!!!!!!
April 25, 2010

Science ( chemistry )
how to make electrohemical cell with iron and aluminium foil? I should make that at home and at school teacher will give me acid or something to put metals in that. And i should know how to conect that with wires and make the bulb light - so i should conect that and make ...
April 25, 2010

biology
How has the origination of macromolecules contributed to organismal development?
April 18, 2010

French
In the first sentence, you left out the "r" in horloge
April 18, 2010

Biology
Elaborate on the role that isomers and functional groups could have lead to the creation of life. Cite one example using a functional group of your choosing
April 18, 2010

math
How do I say .7542?
April 12, 2010

social studies
How do teams determine when a paper or paragraph is good enough to turn in to be graded compared to individuals?
April 12, 2010

social studies
How do teams determine when a paper or paragraph is good enough to turn in to be graded compared to individuals?
April 12, 2010

social studies
How should difficult issues like plagiarism be addressed-and why would these techniques be appropriate?
April 11, 2010

social studies
How do teams determine when a paper is good enough?
April 11, 2010

social studies
No, it is part of my homework to complete a persuasive essay to convince my company the value of providing tuition reimbursement and make extra time for adults learning.
April 7, 2010

social studies
No, it is part of my homework to complete a persuasive essay to convince my company
April 7, 2010

social studies
Thank you very much.
April 7, 2010

social studies
I need help in starting a persuasive essay where the strategy is to convince my company of the value of providing tuition reimbursement and making extra time for adult learning
April 7, 2010

chemistry
If you calculate the density of a gallon of CO2 gas at 27degrees celcius and 0.50 atomic pressure what the atomic pressure be?
March 31, 2010

6th grade - English
i need help with nt
March 22, 2010

Biomedical Science
Rapid addition of the nitric acid:sulfuric acid mixture increases the chance of side products forming.
February 23, 2010

Algebra
theres been less inflation
February 17, 2010

Medical Transcription
Which process involves the removal of thin layers of malignant growth and subsequent microscopic examination? A. Xenograft C. Electrodessication B. Mohs’ surgery D. Patch test
February 5, 2010

3rd Grade Math
I NEED HELP ON MATH
February 2, 2010

Organic Chemistry 51B
can you please explain to me how to use the percentage concentration to calculate volume
February 1, 2010

math
the probability is that yes it would land on heads.
January 31, 2010

literary
write an essay on the religious language and reference to fire in McCathy's novel The Road
January 27, 2010

math, algebra
How do you divide by 5 n=3?
January 21, 2010

Matt 115
Thanks so much I really appreciate your help!
January 19, 2010

Matt 115
Hello, I just wanted to know if someone could check my work to see if they are right or wrong. Thanks :) 5. Find 2/5 of 4/11. Answer: 8/55 8. Are 3/21 and 3/54 equivalent fractions? Answer: No 14. Write in decimal form 8 583/10,000 Answer: 8.0583 22. Solve for the unknown: 8/...
January 19, 2010

math
hi, how are you i am in 5th grade and i want to ask you how i do this listen: matt had $40. he spent $10 on books and $14 on markers.what fraction of his money did he spent?
January 12, 2010

5th grade
find a percent of a number
January 12, 2010

CHEMISTRY
HOW MANY MOLES OF NH3 WOULD BE FORMED FROM 50 GRAMS OF (NH4)2SO4 IN THE FOLLOWING EQUATION? (NH4)2SO4 + 2 NaOH=2NH3 + 2 H2O + Na2SO4
December 27, 2009

CHEMISTRY
HOW MANY GRAMS OF CO2 WOULD BE FORMED FROM 20 GRAMS OF C6H6 IN THE FOLLOWING REACTION? 2 C6H6 + 15O2=12CO2 +6 H2O
December 27, 2009

Medical Coding and Billing
Explain th importance of a fee schedule and the factors it's based on.
December 9, 2009

physic
When you divided by re^2, shouldn't you have multiplied by re^2?
December 4, 2009

math
Write improper fraction as a mixed number or a whole number: 13/12
November 30, 2009

college chemistry
I need to know how to calculate the value of the equilibrium constant for the reaction of zinc metal in a solution of silver nitrate at 25 degrees c. I am totally lost and do not even know if I have all the data I need. Help!
November 28, 2009

7th grade
-6d/3 when d=-10
November 17, 2009

science
it has at lease one meal and one nonmetal element. compound salt
November 9, 2009

Marine Science
Clownfish Mating: Can you compare and contrast reproductive strategies employed by other animals?
November 5, 2009

english
How do you set up a topic sentence when writing an english paper?
November 3, 2009

Physics
A 1500kg car skids to a halt on a wet road where μk= 0.53. How fast was the car traveling if it leaves 62-m-long skid marks?
October 28, 2009

Physics
What is the terminal speed for an 84.0kg skier going down a 37.0degree snow-covered slope on wooden skis μk= 0.060? Assume that the skier is 1.80m tall and 0.300m wide.
October 28, 2009

Physics
The figure shows four electrical charges located at the corners of a rectangle. Like charges, you will recall, repel each other while opposite charges attract. Charge B exerts a repulsive force (directly away from B) on charge A of 3.0 . Charge C exerts an attractive force (...
October 11, 2009

physics
A flock of ducks is trying to migrate south for the winter, but they keep being blown off course by a wind blowing from the west at 6.0m/s. A wise elder duck finally realizes that the solution is to fly at an angle to the wind. If the ducks can fly at 8.0m/s relative to the ...
October 11, 2009

physics
The treasure map gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 490 paces, then due east for 120 paces. Dig." But when you arrive, you find an angry dragon just north of the tree. To avoid the dragon, you set off...
October 11, 2009

linear algebra
I am trying to find the inverse of matrix A but I don't know how to do it with sin and cos. Please help. A=6e3tsin(6t) −6e4tcos(6t) −5e3tcos(6t) −5e4tsin(6t) then A−1=
October 7, 2009

physics
David is driving at a steady 30.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 m/s^2 at the instant David passes. How far does Tina drive before passing David and what is her speed as she passes him?
October 7, 2009

physics
Santa loses his footing and slides down a frictionless, snowy roof that is tilted at an angle of 26.0. If Santa slides 7.00 before reaching the edge, what is his speed as he leaves the roof?
October 6, 2009

7th grade
Could you help me with this -3nsquare + 2n + 8 for n = -2? Sorry can make the square on my computer.
October 5, 2009

Math
fifteen,10+5,5*3=15.nine houndered,ninety nine,900+90+9,333*3=999
October 5, 2009

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