Wednesday
July 30, 2014

Posts by angela


Total # Posts: 1,354

chemistry
Thank you so much for your help! I understood the problem very well (=

chemistry
If you mix 20.0 mL of a 3.00 M sugar solution with 30.0 mL of a 5.57 M sugar solution, you will end up with a sugar solution of_______.

statistics
Please help!! I have been researching this online for hours with no luck... Q: What is the scope and scale of a chart or graph?

psychology
how can i compare and contrast neurophysiological substrates toward a personal situation

math
What fraction is greater? 5/16 or 5/17?

Finance
Would you be willing to pay $500 today in exchange for $10,000 in 30 years?

chemistry
Determine (a) the total number of Cl atoms in 125mL of liquid CCl4 (d= 1.589g/mL) and (b) the number of grams of carbon in 215 of sucrose, C12H22O11.

chemistry
Determine the number of NH4+ ions in a 145 g sample of (NH4)2SO4.

statistics/ please help ASAP
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,...

us history115
in waht ways did democracy create a new political culture? how did democracy impact social change?

Algebra
I need help. 6/x-3 + 2x/x^2-9 = 1/x+3

Algebra
Thanks so much.

physics
An east-west oriented conducting bar 2.0 m long moves north at 20 m/s through a magnetic field of 0.017 T, directed downward. What is the strength and direction of the electric field generated in the bar?

physics
There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes. You put the wet leave...

Physics
There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes. You put the wet leave...

Physics
Yes thank you. I got it can u help me with this one? There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder ...

Physics
IM SO SORRY! it was right! Thanks again! I need help with one more question can u help me?

Physics
ok so v= 2(pi)(2900)/ (380) v=47.95 m/s a=v^2/r= (47.95)^2/(2900)= .792828... and I checked my answer and it was wrong

Physics
thats wrong, thanks anyways bobpursley

Physics
A car travels at a constant speed around a circular track whose radius is 2.9 km. The car goes once around the track in 380 s. What is the magnitude of the centripetal acceleration of the car?

math 116
In 1995, the life expectancy of males in a certain country was 65.3 years. In 1999 it was 68.8 years. Let E represent the life expectancy in year t and let t represent the numbers of years since 1995. the linear function E(t) that fits the data is, E(t)=_t+_ ( round to the nea...

physics
If a proton is accelerated from rest through a potential difference of 1500 V, find its final velocity. proton mass = 1.67 x10−27 kg

Computer Networking
Your company expanded recently to include two new buildings for a total of three, roughly arranged in a triangle with each building 500 meters apart. Previously, these buildings were wired with Category 3 UTP running 10BaseT Ethernet. The IT director mandates that your company...

Geometry
in the middle of the trapezoid

physics
What is the average density of the earth? M = 5.97 x 10^24 kg , R = 6370 km

physics
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs? V = m/s ??

physics
A sports car of mass 950 kg (including the driver) crosses the rounded top of a hill (r = 88 m) at 27 m/s. Determine the normal force exerted by the road on the car. Determine the normal force exerted by the car on the 72-{\rm kg} driver.

physics
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

Buisness
How did U.S. manufactures become vulnerable to offshoring outsourcing? give examples to support your answer?

Physics
W = d(coefficient of fk)(mg) 700 = d(.272)(90)(9.8) d = 2.91m

Physics
The coefficient of kinetic friction between a suitcase and the floor is 0.272. If the suitcase has a mass of 90.0 kg, how far can it be pushed across the level floor with 700 J of work?

2nd grade math
Thank you!

2nd grade math
tell how 6+6 and 6+8 are related

2 grade math
ok i know math and i am smart so i will help you

2 grade math
ok i know math and i am smart so i will help you

physics
What is the average density of Mars? Mass = 6.42 x1023 kg, radius = 3390 km.

Health care management
do you have any ideas on how I could contact a health care manager via e-mail or conduct an online interview for the asnwers to these questions?

Health care management
I need a manager or administrator for a health care organization to assist me in the following: discuss the coordination of internal and external services. 1. Who are the key players? 2. How does coordination take place? 3. What activities or processes are in place to ensure c...

Physics
We can account for the energy lost to friction for a sliding object as... would it be friction force/time traveled?

Chemistry
The air holes have to be closed. When the flame is luminous it is easier to see and not as hot.

PHYSICS
Io is a satellite in Jupiter. The radius of its orbit is 422000 km. Its period is 1.77 days. Calculate the mass of Jupiter.

PHYSICS
vector B is 3.46 units long toward the east. Vector A is 4.00 units long 30 degrees N of E. How long and in what direction is C = A - B?

physics
a block of ice initially sliding at 15m/s on a frozen pond comes to rest after traveling 90 meters. What is the coefficient of friction?

Physics
A rifle is aimed horizontally toward the center of a target 220 m away. If the bullet strikes 48 cm below the center, what was the velocity of the bullet (ignore the friction)?

english/nursing
Why is nursing considered a professional career? I have to write a paper on professionalism and how nurses represent this.

communication
My text gives the definition of confidently aggresive, self assured, and the ability to recognize our rights and responsibilities while still respecting the rights of others so now im totally confused.

communication
What are the concepts of assertive communication? What are the benefits of being an assertive nurse? The only thing I can come up with is that being an assertive nurse would allow you to stand up to a physician or authority when you feel they have done something wrong and have...

college
Do you believe electrons exist and why or why not?

Science
If you do or do not believe in electrons can you explain why you do or do not?

Chemistry
Why do you believe electrons exist?

Science
Why do you believe electrons exist?

physics
A box is sliding down a ramp sloping 25° above the horizontal. The coefficient of kinetic friction is 0.15. What is the acceleration? The answer is 2.8 m/s^2. How can this be solved with out mass?

physics
A model rocket is propelled upward by a cylinder of compressed water. The cylinder emits water at a rate of 0.050 kg/second with an exit speed of 80.0 m/s. Initially, the rocket has a mass of 0.15 kg, including the water cylinder. What is the rocket's initial upward accel...

physics
A model rocket is propelled upward by a cylinder of compressed water. The cylinder emits water at a rate of 0.050 kg/second with an exit speed of 80.0 m/s. Initially, the rocket has a mass of 0.15 kg, including the water cylinder. What is the rocket's initial upward accele...

college physics
A box is sliding down a ramp sloping 25° above the horizontal. The coefficient of kinetic friction is 0.15. What is the acceleration? The answer is 2.8 m/s^2. How can this be solved with out mass?

college physics
What is the cross product a x b of the two vectors a = 64.00 m directed due east and b = 32.00 m directed 30° north of east?

College Physics
thank you

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?

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?

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?

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

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?

Physics
^acceleration is 9.8 as well. and wheres 343 from ?

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?

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 !

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...

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?

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?

college physics
got it. thanks

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?

physics
thank you!

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?

college physics
Would you need to know the mass to solve this problem?

3rd grade
3860

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

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 answe...

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

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

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 mak...

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 ...

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 g...

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) ...

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 ...

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?

com 155
I don't know

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

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

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

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

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

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

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?

Math
P/3 - 3P/8 =

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 tha...

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

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

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

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

algebra2
what is percent notation

algebra2
find percent notation 15/25

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