# Posts by angela

Total # Posts: 1,718

**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 ...

**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 ...

**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 ...

**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 ...

**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 ...

**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?

**English-literature**

illuminate a solutoion

**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 . DON'T 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 ...

**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

**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.

**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.

**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

**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 ...

**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...

**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 ...

**1st grade/english**

wich word is correct fill the pot or fill the pop

**math**

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

**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 ...

**Science ( chemistry )**

PLEASE I NEED HELP IT IS URGENT !!!!!!!

**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 ...

**biology**

How has the origination of macromolecules contributed to organismal development?

**French**

In the first sentence, you left out the "r" in horloge

**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

**math**

How do I say .7542?

**social studies**

How do teams determine when a paper or paragraph is good enough to turn in to be graded compared to individuals?

**social studies**

How do teams determine when a paper or paragraph is good enough to turn in to be graded compared to individuals?

**social studies**

How should difficult issues like plagiarism be addressed-and why would these techniques be appropriate?

**social studies**

How do teams determine when a paper is good enough?

**chemistry**

I am not sure as to find out the charges on each of the spectator ions?

**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.

**social studies**

No, it is part of my homework to complete a persuasive essay to convince my company

**social studies**

Thank you very much.

**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

**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?

**6th grade - English**

i need help with nt

**Biomedical Science**

Rapid addition of the nitric acid:sulfuric acid mixture increases the chance of side products forming.

**Algebra**

theres been less inflation

**math**

Which expression is equivalent to the expression below? 3x 1 - 5

**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

**3rd Grade Math**

I NEED HELP ON MATH

**Organic Chemistry 51B**

can you please explain to me how to use the percentage concentration to calculate volume

**math**

the probability is that yes it would land on heads.

**literary**

write an essay on the religious language and reference to fire in McCathy's novel The Road

**math, algebra**

How do you divide by 5 n=3?

**Matt 115**

Thanks so much I really appreciate your help!

**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/...

**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?

**5th grade**

find a percent of a number

**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

**CHEMISTRY**

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