# Posts by samantha

Total # Posts: 1,727

**physics**

A 15.0 kg mass and a 10.0 kg mass are suspended by a pulley that has a radius of 10.0 cm and a mass of 3.0 kg. The cord has negligible mass and causes the pulley to rotate without slipping. The puller is frictionless and may be treated as a uniform solid cylinder. Note that ...

**physics**

In outer space two identical space modules are joined together by a 500.0 massless cable. These modules are rotating about their center of mass. In each module, the cable is connected to a motor,so that the modules can pull each other together. The initial tangential speed of ...

**Physics**

A penny farthing is a bicylce that was popular between 1870 and 1890. As the drawing shows, this type of bicycle has a large front wheel (R=1.20m) and a smaller rear wheel (r=.34m). A bicyclist, riding at a linear velocity of 12.5 m/s, applies the brake and produces an angular...

**physics**

Thank you for your help. I appreciate it.

**physics**

A solid cylinder of radius 0.85m is released from rest from a height of 1.8m and rolls down the incline as shown. What is the linear speed of the cylinder when it reaches the horizontal surface?

**Physics**

A solid cylinder of radius 0.85m is released from rest from a height of 1.8m and rolls down the incline as shown. What is the linear speed of the cylinder when it reaches the horizontal surface?

**7th grade math**

The second difference of a sequence is a constant 5. The differences between the first term and the second term, 12, is 8. How do I find the first five terms?

**Trig**

Cos x

**CHEMISTRY**

18.8 pm

**geometery**

Triangle TUV is the midsegment triange of triangle ABC. Which angel does not necessarily measure 40 degrees?

**Science/Chemistry**

22Na has a half-life of 951 days. How many grams of a 1.00 kg sample would be left after 4 years?

**religion**

why do muslims fast in ramadan and not during any other islamic month?

**history**

How is that Buddhism declined after the Muslim invasions while Hinduism survived?

**algebra 1**

A ladder leans against a building, forming an angle of 53° with the ground. The base of the ladder is 3 ft from the building. To the nearest hundredth of a foot, how long is the ladder?

**Chemistry (really need quick help)**

Balance the following equations. (Use the lowest possible coefficients. These may be zero.) (a) As(s) + ClO3-(aq) ---> H3AsO3(aq) + HClO(aq) (acidic solution) I am using half-reactions but I don't really get this at all. Can someone explain?

**science**

plunger a has an area of 54cm and plunger b has an area of 15cm, how much more force can be exerted by plunger b

**chemistry**

Assign an oxidation state to each atom in each of the following compounds. 1) Fe(CN)3 i know Fe= +3 but how do i find the oxidation state for C and N? does CN have a normal over all charge?

**Science_Chemistry**

Oh... I get it now! Thank you very much. Your help is greatly appreciated.

**Science_Chemistry**

volume+ 1000/1.1=909 ml? I don't get this... I understand how you got the water

**Science_Chemistry**

How did you get the amount of water?

**Science_Chemistry**

A glucose (C6H12O6) solution is 2.5% glucose by mass. If the density of the solution is 1.10 g/mL, what is the molarity of glucose/water solution?

**Chemistry**

What is the pH of a 0.0250 M solution of HCN? Ka = 4.0x10^-10

**7th Grade Science, Plz help due tomorrow!!!!**

What are tetrahymena thermophila's primary source of energy??

**Science**

Where do paramecium bursaria fit in an ecological food chain? Are paramecium bursaria a producer, consumer, or decomposer? What eats paramecium bursaria?? PLZ HELP!! THANK YOU!! :)

**Social Studies**

i hope it helps. i did my best. I did the best i could with the situation. but i didn't do much...i did everything with excitement and joy all from my heart. i never ever had as much fun or felt so much happiness in an anti-slavery meeting...but when i was in an anti-...

**science**

Can someone please give me a good website (other than wikipedia)on the four natural selection. -Thank you

**Calc 3**

How do I integrate rcos2theta dr? and then I have to plug in the limits 1 and 2sin2theta for theta and plug what I get from that into a second integral. Help!

**French**

Bonjour! So for my homework assignment I'm writing a letter to the clouds because I'm angry about waking up to snow this morning. We just have to use vocab words. Anyway, I'm stuck on how to say this: Please keep your precipitation to yourself My best attempt is: S...

**Chem help!!!!**

I am supposed to find 2 food labels that have high chemicals in them. This is the instructions he gave us: Highlight all CHEMICAL names on the label (DO NOT COUNT wheat, flour, sugar, salt, oils, salt, etc) (however dextrose would count) please help me find two foods that ...

**help chem quick question!**

I have to find a food label that has horrible chemicals in it (such as dextrose). I am supposed to find 2 food lables with the nastiest labels.? What foods would be a good choice?

**chemistry**

How many grams NO gas can be produced from 110mL of 4.00 M HNO3 and excess Cu? 3Cu(s) + 8HNO3(aq) – 3Cu(NO3)2(aq) + 4H2O(l) + 2NO(g)

**Art Project**

I have to do an art project for my art class and I am having trouble thinking of an idea. My art project has to be "shock art" its almost like DaDa but its got to be shocking. I can paint it, draw it, make a collage, or just put pictures together...anything really

**Physics**

What is the magnitude of the force per meter of length on a straight wire carrying an 8.50 -A current when perpendicular to a 0.55 -T uniform magnetic field?

**pre-algebra**

a sweater originally cost $37.50. Last week, Moesha bought it at 20% off.How much was deducted from the original price

**chemistry**

how many atoms are in 0.320 moles of aluminum?

**Algebra Please Help**

1. you can tell is a polynomial is written in factor form wether it is like this 4(6n+9j-6v) or 8h(9k+3l)or m(6+k) 2. 14x^4 - 6x^3 + 2x^2 3. Yes you cn use the F.O.I.L method. 4. you can use the formula a^2 + 2ab + b^2. (a+b)^2 or you can you use the F.o.i.l method. (a+B)(a+b)

**Math**

can someone please help me...

**Math**

Heres a challenge: six students(4 boys and girls) were divided into three pairs. given this information. What is the probability of 2 girls making 1 pair? Express as a common fraction. Oh and please explain!!

**History**

My teacher wants me to tell her what the climate is like in alaska but i cant seem to find anything about it in simple terms.... what is a good way to put it?? PLEASE HELP ME

**uog**

A survey of an urban university (population of 25,450) showed that 750 of 1100 students sampled attended a home football game during the season. What inferences can be made about student attendance at football games? Using the 90% level of confidence, what is the confidence ...

**business**

a. be as ambiguous as possible to avoid offending the members of the audience. b. begin the message with something both of you and the audience can agree upon. c. try to convince the audience that your solution is perfect and that there are no other alternatives. d. deliver ...

**Organic Chemistry**

How many grams of 2-propanol are expected from the complete reaction of 111 g of propene?

**math**

Bart's drama club put on a play.There were 843 people in the audience.Each ticket to the play cost $8.The audience was seated in 3 sections.If each section had the same number of people,how many people were in each section?

**social studies**

is roanoke the first colony? or is jamestown the first colony?

**health management**

As health care manager what two strategies would you consider to help build internal and external relationships that could benefit your organizations?

**Geometry**

Find the measure of each angle if <BAD and <BDC are right angles and m<ABC=84

**English**

EVERY YEAR AS SOON WHAT WILL WHAT DELICIOUS MOST IMPORTANTLY INDEED THE ______ ______ What are the next to words?

**Spanish-6th grade-Please check my answers**

Could you please check these I think they're correct but I'm not sure. 1.How old am I? Tengo once años. 2.How old is your father? Mi padre tiene cuarenta y seis. 3.Do I have siblings? Sí,tengo dos hermanos. 4.Son mayores or menores? Son mayores. 5.Are you...

**Spanish-Please check my answer**

Thanks a million-I really appreciate it

**Spanish-Please check my answer**

If I say my mom is younger than my dad do I say it this way? Mi madre es menor de mi padre? or do I say Mi madre es menor? Thank you I'm really confused on this one.

**Spanish-6th grade**

Thank you very much

**Spanish-6th grade**

1.If someone's birthday is December 1 would I say Es el primero de diciembre or Es el uno de diciembre? I think I would say Es el uno de diciembre because I think I only use el primero for January/ Is that correct? 2. If I said my grandparents names are Mary and Clem would...

**social studies**

what was a puritan business charter? why was it important? and why did king chrles stopped giving out the charter? Can you explain the importance of this charter? please. -thank you:)

**math**

how much meters go in 38,000cm

**math**

Megan factored the expression (-12x^2+52x-35) as (-2x+5)(6x-7) but when Jacob applied FOIL principle and multiplied out (2x+5)(6x-7) he got (-12x^2+44x-35),thus megan's solution does not appear to check please help megan to understand better.Explain your reasoning and ...

**math(geometry**

W and Z are coordinates of OR and ST respectively. In parts (a)-(c) find coordinates of W and Z

**algebra**

answer to Solve the system of equations by graphing then classify the system 6x-y=39 6x+7y=15

**Math**

If f(x)= 3/x-4 and g(x)=2x, there is at least one value of x for which the composite function f(g(x)) cannot be evaluated. What is that value of x? For what value(s) of x is it impossible to evaluate g(f(x))? How do you figure this out?

**math**

She has 16 bracelets. The number of earrings is 2 times the number of necklaces. she has 43 pieces of jewelry in all. How many of eac piece of jewelry does she have?

**Math**

If f(x)=3x^2 g(x)= 1/6+x find the following and give the domain (f+g) (x) (3x^2) + (1/6+x) x is all real numbers and x is not equal to 6 (f-g) (x) (3x^2) - (1/6+x) 3x^2 -6-x x is all real numbers and x is not equal to -6 (f x g) (x) I do not understand (f/g) (x) 3x^2/6-x x is ...

**sorry left out a "x"**

If f(x)=3^2 g(x)= 1/6+x find the following and give the domain (f+g) (x) (3x^2) + (1/6+x) x is all real numbers and x is not equal to 6 (f-g) (x) (3^2) - (1/6+x) 3^2 -6-x x is all real numbers and x is not equal to -6 (f x g) (x) I do not understand (f/g) (x) 3^2/6-x x is all ...

**Algebra 2**

If f(x)=3^2 g(x)= 1/6+x find the following and give the domain (f+g) (x) (3^2) + (1/6+x) x is all real numbers and x is not equal to 6 (f-g) (x) (3^2) - (1/6+x) 3^2 -6-x x is all real numbers and x is not equal to -6 (f x g) (x) I do not understand (f/g) (x) 3^2/6-x x is all ...

**7th social studies**

where did the pilgrims(separatists) build their settlement site on?

**Chemistry**

a gas has a volume of 1.75 L at -23 degrees Celsius and 150 kPa at what temperature will the gas occupy 1.30 L at 210 kPa

**Physics**

$53,240.60

**Psychology**

Andy, age 16 lacks self-discipline fails to plan ahead and is quickly frustrated by challenging tasks. He is anxious and overly critical of others. Use the psychoanalytic, humanistic, and social-cognitive perspectives to give three contrasting explanations of Andy's ...

**math**

WHAT are the frist 10 composite numbers

**math**

thanks

**math**

A number divisible by another number when the ________ after division by that number is 0?

**math**

thanks too all that helped.. and marcie its okay thanks anyways:)

**math**

but how do you know?

**math**

is 2,340 divisible by 90? how do you know?

**math**

u and the helper lol

**math**

thanks

**math**

thanks for the help i got another question. if 1/5 of a region is not shaded, what part is?

**math**

alex has 7 dimes and three nickels. what fraction of the coins are dimes?

**math**

camp big trees has 3 red canoes 4 blue canoes what fraction of the canoes are red?

**math**

12/17??

**math**

if 5/17 of a region was shaded wat part is not?

**Medical office practice**

appointments - preparing new patient appointments schedule drafting letter to patients to inform of new doctors hours

**physics**

a yo-yo of mass 440kg measuring 0.9m in radius was dropped from a platform 63m high. One end of the string was tied to the platform, so the yo-yo unwinds as it descends. Assuming the axle of the yo-yo has a radius of 0.2m, find the velocity of descent at the end of the fall. ...

**Psychology**

Question: • If each gender has an advantage based on its brain pattern, how can social scientists say that these differences create a disadvantage for females? (Think about the highest paying and highest prestige career fields and what skills are necessary for achieving ...

**Psychology**

sorry... explain the Glass Ceiling affect in greater detail please.

**Psychology**

Use the Internet to explore a sexual discrimination suit that involved the principle of the Glass Ceiling.

**History**

. Use the Internet to research how ethnicity affected the lives of these prominent figures in ONE of these ethnic minority groups: Henry O. Flipper and Rosa Parks (African American), Leonard Peltier and Wilma Mankiller (Native American), César Chávez and Josefina...

**History**

.Several states have passed legislation abolishing many policies associated with Affirmative Action. What is your opinion concerning the place of Affirmative Action in hiring practices or academic admissions?

**psychology**

• If each gender has an advantage based on its brain pattern, how can social scientists say that these differences create a disadvantage for females? (Think about the highest paying and highest prestige career fields and what skills are necessary for achieving success in ...

**pyschology**

i think that gender stereotypes are not the same as they were in the 50s but there are still stereotypes just not some much about gender i think people stereotype race and culture and how you look more now.

**pyschology**

Talk to your parents or older friends or relatives about gender stereotypes since the 1950s. Which, if any, gender stereotypes have remained fairly consistent since the 1950s? If you think some stereotypes are the same, what has perpetuated them? If you think we don't have...

**Chemistry (stoichiometry**

well thank you both that really helped...=D

**Chemistry (stoichiometry**

(This homework question has been removed due to a copyright claim submitted by K12, Inc.) _----------_ [" okay this is what i got and im not sure if i did it right nor do i know if i answered everything the questions wanted so could you help me out please"] _...

**4th grade**

what is 27×19 in expanded algorithm?

**chemistry Molarity**

529.5

**4th grade**

do u know how to bulid the alamo ?well me nither so lets find out

**math**

To fond what is the same in the 8 and the 9's

**algebra**

whta is the rule? m 2 4 6 8 n 18 16 14 12

**discrete math**

Let A= {for all m that's an element of the integers | m=3k+7 for some k that's an element of positive integers}. Prove that A is countably infiite. Note: you must define a function from Z+ to A, and then prove that the function you definied is a bijection

**Discrete Math**

Let a, b, c, and d be integers, and let n be a positive integer. Prove that if a is congruent to c mod n and b is congruent to d mod n, then (a-b) is congruent to (c-d) mod n

**AP Chemistry**

Two solid objects, A and B, are placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g water at 10.0 degrees Celsius. Object A increases the water temperature by 3.50 degrees Celsius; B ...

**chemistry help!**

A sample of methane gas, CH4 was collected over water at 25 degrees celcius and 720 torr. The volume of the wet gas is 2.50L. What will be the volume of the dry methane at a standard pressure?