Posts by Kristin

Total # Posts: 208

Thermodynamics
An intrepid explorer takes 400 g of ice from the cold Siberian environment, where the temperature is –40 degrees and places it in a kettle inside his mobile laboratory. The ice melts and he heats the water to +40 degrees. What is the total amount of heat absorbed by the ...

algebra
simplify and write using only positive exponents. thanks. (2x^3y^4)^-2 divided by (8xy^6)^-3

Chemistry
write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water

chemistry dilutions
you have 47 mL of a 2 M stock solution that must be diluted to .5 M how much water should you add

calculus
The function f is continuous on the closed interval [0,6] and has values that are given in the table below. x |0|2|4|6 f(x)|4|K|8|12 The trapezoidal approximation for(the integral): 6 S f(x) dx 1 found with 3 subintervals of equal length is 52. What is the value of K? How do ...

Chem 100
at 1 atm how much energy is required to heat 67 grams of H2O(s) at -22 degrees C to H2O(g) at 159 degrees C

Math
50=n/2+26

4th grade math
Find a rule that gives the third number from the first two numbers. Fill in the blanks.....10, 4, 5, ? 15, 7,7, ? 19,9,?

Chemistry
I don't understand how you know what state designation things are in a chemical equation. For example this is given: 2 (NH4)3PO4 (__) + 3 Ba(NO3)2 ---> Ba3(PO4)2 (__) + 6 NH4NO3 (__) How do you just know what to put for their state or phase designation?

reimbursement methodologies
does anyone have answers to test 38181803 for penn foster

Physics
A coiled Hookean spring is stretched 10 cm when a 1.5kg mass is hung from it. Suppose a 4 kg mass hangs from the spring and is set into vibration with an amplitude of 12 cm. A. Find the force constant of the spring. B. Find the Maximum restoring force acting on the vibrating ...

algebra
-9 + 36 divided by 6 times 2 -(-6) - 5 +2 = ? I'm having trouble with the order of operations.

Math
estimate:42.9*7.84=

math
An urn holds 13 identical balls except that 2 are white, 4 are black, and 7 are red. An experiment consists of selecting two balls in succession without replacement and observing the color of each of the balls. How many outcomes are in the sample space for this experiment? How...

math
An urn holds 13 identical balls except that 2 are white, 4 are black, and 7 are red. An experiment consists of selecting two balls in succession without replacement and observing the color of each of the balls.

math
please explain how to get the answer to this question. five students make the following guesses on the number of jelly beans in a jar: 72, 78, 68, 60 and 84. the guesses were off by 14, 2, 4, 6 and 10 (not in order). how many jelly beans are in the jar?

math
five students make the following guesses on the number of jelly beans in a jar: 72, 78, 68, 60 and 84. the guesses were off by 14, 2, 4, 6 and 10 (not in order). how many jelly beans are in the jar?

general
kristin nhas found answers and no longer needs help thank you

general law
Dr. Bob applies for medical staff privileges at General Hospital. The hospital administrator? A. is not required to look into Dr. Bob’s background. B. is required to query the National Practitioner Data Bank. C. is required to query the Data Bank unless Dr. Bob is a ...

penn foster
Dr. Bob applies for medical staff privileges at General Hospital. The hospital administrator? A. is not required to look into Dr. Bob’s background. B. is required to query the National Practitioner Data Bank. C. is required to query the Data Bank unless Dr. Bob is a ...

law
Dr. Bob applies for medical staff privileges at General Hospital. The hospital administrator? A. is not required to look into Dr. Bob’s background. B. is required to query the National Practitioner Data Bank. C. is required to query the Data Bank unless Dr. Bob is a ...

law
news paper calls a rehab clinic and asks if a celebrity is a patient..clinic should: lie, tell ytruth, acknowledge shes there but give no details, say its prohibited

Physics
and for part d, take what the answer you got for c and plug all your variables into the equation of answer part c = .5 * .045 * v^2

Physics
for part c, the answer should be the exact same as part b.

Physics
for part b, take the amplitude (1.4) and square it and then multiply by what you got for part a. so PE = .5 * k * x^2 = .5 * .72 * 1.4^2

Western Civ Please Help : )
thank you

Western Civ Please Help : )
like why would Tacitus put Augustus in a bad line? What changed about Rome because of Augustus?

Western Civ Please Help : )
Explain the Difference during the Roman Empire on what Augustus says about himself and what Tacitus says about Augustus

Chemistry
The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H ions;that is, delta H(f) [H+(aq)]=0 A.for this reaction: calculate delta H(f) for the Cl- ions. HCl(g) ==H2O==>H+(aq)+Cl-(aq) delta H= -74.9 kJ/mol (...

multimeter
When an AC voltage is being measured across a 15 Ù resistor which is carrying a current of 12 amps, the selector switch should be set to the AC voltage position of

physic
A 0.20 kg ice cube at 0.0° C has sufficient heat added to it to cause total melting, and the resulting water is heated to70deg.Cel. > How much heat is added? (For water Lf=334kj/kg > andLv=2257kj/kg >

grammar
The informant, who will not be named, called in a tip last night informing police officers about an attempted robbery. The cold, dry, and ruthless wind lashed at their bare hands and faces. Are these sentences grammatically correct?

Schindler's List Essay
Directions: We recently watched the movie "Schindler's List," and now we have to write an essay. So I chose to write it based on this question: What are the three most important reasons for Schindler's success in saving 1,100 people? This assignment is ...

Chemistry
Ok, so for the first one I got mol of HCl=4.92x10^-4 and so [OH-] is 4.92x10^-4/.020L = .0246 mol/L. Is that correct? And then from there I have the [OH-] in NaOH to be (.0125)(.020L) = 2.5x10^-4 [OH-] in Ca(OH)2 is .0246-2.5x10^-4 = .02435 [Ca2+] then is .012175 Are my ...

Chemistry
I'm trying to find the solubility of Ca(OH)2 in .0125 mol/L aqueous NaOH. Here is my data: Vol of solution used per titration: 20mL Conc of HCl: .1201 mol/L Average Titre: 4.71 I need to calculte: 1. the TOTAL [OH-] in the saturated solution of Ca(OH)2 in NaOH 2. the [OH...

biology
Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable genotypes of the snapdragons in your garden?

Chemistry
The solubility of compounds containing the carboxylic acid group can be increased by reaction with a) sulfuric acid b) nitric acid c) sodium hydroxide d) water e) benzoic acid Would it be sodium hydroxide since it is a base?

Chemistry
The solubility of compounds containing the carboxylic acid group can be increased by reaction with a) sulfuric acid b) nitric acid c) sodium hydroxide d) water e) benzoic acid

math
1) x+8y=33 -x+4y=3 I need help solving this one using the elimination method!

math
1) 6m+n=47 m-4n=12 can someone help me solve using substitution method?

math
can someone please help me with this elimination methods problem? 0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination method and give the ordered pair...

math
I am also confused as to how to work the fraction part of number 3 can you help?

math
I am still confused on number one because it starts with the same variable so I don't really know where to start can you help....?

math
Elimination Method....I am not understanding this method either and need some help here is what I am working on: 1) x+8y=33 -x+4y=3 2) 5x+5y=-7 7x-2y=13 3) 0.3x-0.2y=4 0.5x+0.3y=-7/17 Can someone please help me with these!

Math
For number 3 I got (6.7,51.8) is this correct?

Math
Okay so what about number one it is a + and the a - for the second problem how do you figure a subtitution problem like that? do the signs make a difference?

Math
Okay but the homework is saying the answer is (-7,8) so how would they have gotten that from the equation you did above?

Math
Can someone help me solve the following problems using the substituion method? I need to find the ordered pairs and I do not get it.... Here they are 1) 6m+n=47 m-4n=12 2) 6x+4y=-10 -7x+y=57 3) 5x+7y=43 -4x+y=25

health
yes page 324 in the book provides a detailed list so I just copied those right out of the book Thanks

physics
If you see a lightening bolt, then count 4 seconds until you hear thunder, about how far away was the lightening strike?

physics
A tennis ball is dropped from the top of a building. It falls for 2.5 seconds before it hits the ground. (a) What velocity is the tennis ball traveling right before it hits the ground? (b) How high is the building?

physics
If an arrow is fired at 200km/h horizontally, about how long will it take to strike a target 30 meters away?

5th grade
Rajen chose a secret number and gave these clues to his friends. the number is even and it is divisible by 3, three times the number is less than 60 but greater than 40. what is Rajen's number?

5th grade
Rajen chose a secret number and gave these clues to his friends. the number is even and it is divisible by 3, three times the number is less than 60 but greater than 40. what is Rajen's number?

college physcs
0.854m/s

math
identify the rate in the following statement 27% of 500 is 135

math
or 13 qt 1pt

math
27 pt

math
simplify 9qt 9pt

math
3500 cm2=________L

math
thanks

math
3,500 cm2=_____L and simplify 10lbs 28oz

math
simplify 10 lbs 28 oz

MATH
3500 cm2=___________L

MATH
IS THE SQUARE ROOT OF 21 A) 5 AND 6 b) 7 AND 8 c) 4 AND 5 d) 6 AND 7

math
is the following set of numbers a perfect triple? 13,15,18

math
find the missing length of the right triangle one side is 20 and th other side is 48?? help

MATH
WRITE A PROPORTIAN THAT IS EQUIVALENT TO THE STATMENT : IF 3 GALLONS OF GASOLINE COST $5.37, THEN 8 GALLONS WILL COST $ 14.32.

Medical
what might be the cause of onset of social fobia in a 19 year old boy?

literature
What are the parts of speech to each word in this sentence: I like the movie Clueless its based on Jane Austens novel Emma.

calculus
compute the average velocity of a stone over time intervals 1, 1.01 1, 1.001 1, 1.0001 and .99,1 .999,1 .9999,1. use this to estimate instantaneous velocity at t=1 All i can figure out the formula should be s(t1)-s(t0) over t1-t0 how does that give you a number what am i missing

chemistry
Why do induced dipole-induced dipole forces increase as the number of electrons in a molecule increases? a. More electrons make the electron cloud more polarizable. b. More electrons means that there are more protons in the nuclei which hold the electrons more tightly and ...

chem
* 25.7 and 30.0 for the temperature

chem
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 300C, the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature is ...

Physical Science
thank you

Physical Science
what 2 substances found in my home that could conduct electricity and explain why?

psychology
1 instinct

Science.
What did scientist learn from studying Supernova 1987A?

Fundraisers
We are trying to raise money in our high school for children with cancer. Do you have any suggestions as to what we should do? -Dance -Concert -Bake Sale ...anything else??? can you please help! thanks! (IK this isnt hw)

AP World History
Hi, I am writing a camparative essay on egypt and mesopatamia. We are comparing similarities- social and environment, and differences- religion and interections. Please help me find a good thesis to write for this paper. Thanks (:

vocab, again! sorry!
The manager seemed to be decorous in the meeting, but really he was thinking of the weekend.

vocab, again! sorry!
The manager seemed to be decorum in the meeting, but really he was thinking of the weekend. is that ok?

vocab, again! sorry!
Hi, again. I need help with this word decorum. the def is ADJ proper; seemly correct how do i use this in a sentence?

vocabluary
sorry. fleck**

vocabluary
that is the definition we were given, how else would you write a sentence with slough also can you check over this sentence. martha, a perfectionist, started over because she got a FECK of sharpie on her project was feck used properly?

vocabluary
i used the definition 4. a condition of degradation, despair, or helplessness.

vocabluary
is the sentence: slough is very prominent in many households that are in the slums gramatically correct? how do i use slough in a sentence?

governmnet
does anyone know what the ap exam for gov and pol is like?

physics/math
Joe is a former basketball player who is now a work-out junkie, and especially loves to do push-ups. He was a good athlete, but not so good at science in school, especally not good in Physics. He wants you, yes you, to calculate how much work he does, in strict terms of ...

science
mercury is what planet from the sun?

science
mercury is what planet from the sun

science
what color are the coolest stars in the galaxy

Physics
A rocket with a mass M moves along an x axis at the constant speed vi=40 m/s. A small explosion separates the rocket into a rear section (of mass m1) and a front section; both sections move along the x axis. The relative speed between the rear and front sections is 20 m/s. ...

literary
the point of our highest interest and greatest emotional involvement in a narrative

computers
Suppose Fred's Computers advertises that their new computer comes with exactly 1,200 megabytes of RAM in main memory. Why is this unlikely to be true?

algebra 2
solve for x (x-4)(x+2)=40 you need to make it eaqual to 0 and the correct answer is 8 and -6. how do i get this answer

Physics
What is the difference in volume (due only to pressure changes, not temperature or other factors) between 1000 kg of water at the surface (assume 4 degrees C) of the ocean and the same mass at the deepest known depth, 8.00 km? (Mariand Trench; assume also 4 degrees C.)

Grammar
OK. So are these correct?? 1. Thoreau was a teacher (PN) in Concord Mass. 2. In 1845 he left his (IO) and went to the woods near Walden pond. 3. He built a small cabin (DO) for himself and lived there for 2 years. 4. His life at Walden pond was an experiment (PN) in quiet ...

Grammar
1. Yes, left is the active verb and what he did was leave his home. 2. Active verb is built and he did it to the cabin.

Grammar
Thank you!!! Can you help with a couple more? 1. In 1845 he left his home and went to the woods near Walden Pond. 2. He built a small cabin for himself and lived there for 2 years. 3. His life at Walden Pond was an experiment in quiet solitude. 3. For Thoreau, nature seemed a ...

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