Sunday
May 24, 2015

Posts by jenna


Total # Posts: 530

math
simplify in radical form (x^-2/5)^1/4
April 24, 2013

chemistry FP depression
if I had to choose a solvent for a freezing point depression lab...would I choose Chloroform or Benzophenone? and why?
April 23, 2013

chemistry
if calculating molecular weight of unknown by freezing point depression...All of the unknowns in the activity were nonpolar organic molecules with molecular weight= 100-250 g/mol and using around 1g of the unknown. Provide an example of a solvent that could possibly be used ...
April 22, 2013

chemistry HELP
if calculating molecular weight of unknown by freezing point depression...All of the unknowns in the activity were nonpolar organic molecules with molecular weight= 100-250 g/mol and using around 1g of the unknown. Provide an example of a solvent that could possibly be used ...
April 22, 2013

physics
Thunderstorms can have an electric field of up to 341 × 10 ^5 N/C. What is the magnitude of the electric force on an electron in such a field? The fundamental charge is 1.6002 × 10^−19 C .
April 22, 2013

Physics
A coil with 347 turns of wire, a total resistance of 49 Ω, and a cross-sectional area of 0.28 m2 is positioned with its plane perpendicular to the field of a powerful electromagnet. What average current is induced in the coil during the 0.31 s that the magnetic &#...
April 22, 2013

physics
A flat coil of wire consisting of 56 turns, each with an area of 39 cm^2, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from 3.1 T to 10 T in 5.7 s. If the coil has a total resistance of 0.56 Ω, what ...
April 22, 2013

Chemistry
You're incorrect.
April 7, 2013

Math
Is the equation sinx + cosx = 1 an identity? Why?
March 20, 2013

Physics
A series of pulses, each of amplitude 0.190 m, are sent down a string that is attached to a post at one end. The pulses are reflected at the post and travel back along the string without loss of amplitude. (a) What is the displacement at a point on the string where two pulses ...
March 16, 2013

psychology
The first year after the speed limit was reduced to 55 mph was the first year since there was a federal speed limit that no one in the United States who was observing the speed limit died in an auto accident. What does this prove?
March 4, 2013

Psychology
I know a man who read to his 5 children every night before they went to bed, and they all could read before entering preschool. Suppose that this were true of all children we could find who were read to every night before going to bed but true of only a few of those who were ...
March 4, 2013

psychology
For question #1, can you say that the two variables are positively correlated however, it doesn't mean that running regularly can cause one to lives longer. For question #2, are you saying that there are other variables that need to be considered?
March 4, 2013

psychology
1. A recent study confirms that people who run regularly, live longer. How can one explain that? 2. More retired people die each year than those who have not retired. Does this mean that delaying retirement will increase one's life expectancy? Explain.
March 4, 2013

Psychology
How could my wife and I find out whether the South Beach Diet works for us? Write the methods section for an experiment.
March 4, 2013

psychology
Here is what i come up with. will you see if it make sense? Recruit few random women from her age group. Randomly divided them into 2 groups Assign each group one of the bicycle. Let the two groups compete and see which group perform better.
March 4, 2013

psychology
A friend of mine finished fourth in her age group in the world duathlon (run, ride, run). She has two bicycles that differ along several variables, but she isn’t sure which one will be best for the next season. How could she find out? Write the methods section for an ...
March 4, 2013

psychology
Suppose that you have developed three new kinds of hair shampoo, and you want to know how people's preference depends on their age. Design an experiment to find out.
March 4, 2013

psychology
What implications do the results of an experiment have for subjects that were not observed in the experiment?
March 4, 2013

Math
Use the discriminate to determine the number of real solutions of the equations. 7^2-2x+1
February 25, 2013

Probability/Decision Analysis
A manufacturer is trying to decide whether to build Building A or Building B. The profit per unit is $5. Building A gets an annual cost of $100,000 with a production capacity of 25,000 units each year. Building B gets an annual cost of $200,000 with a production capacity of 50...
February 20, 2013

Statistics
A brewery's filling machine is adjusted to fill bottles with a mean of 32.6 oz. of ale and a variance of 0.004. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability that the next ...
February 15, 2013

H. CHemistry
if the atmosphere can support a column of mercury 760 mm high at sea level, what height of a hypothetical liquid whose density is 1.40 times the density of mercury could supported?
January 30, 2013

geometry
a ladder is placed next to a building to get to the top. the bottom of the ladder is placed 7 feet away from the building at an angle of 56 degrees.how tall is the building?
January 29, 2013

english
What is the simple subject and simple predicate in sentence: The smell of cooking is delicious to the hungry campers.
December 31, 2012

english
What is the simple subject and simple predicate in the sentence: A good fire is difficult to build.
December 31, 2012

math urgent
i think it b c a
December 20, 2012

Algebra 2
Subract. Put the answer in the simplest form 9/x-4 - 5/x+4
December 19, 2012

Math
1. The total of 36, 78, 198, 475, and 620 is A. 2,109. B. 1,731. C. 1,187. D. 1,407. I say it's D 1407
December 10, 2012

Math
what is 5.8, 5.29,5.2942,5.029 from least to greatest
October 8, 2012

ok
ok any body else thatcould anser this cuz i don't want to do my homework
October 1, 2012

Math Help!
is 10 000 more than 881 462 is 1000 000 less than 2 183 486 is 1 000 000 more than 746 000 is 1 000 000 less than 624 327 207
October 1, 2012

governement
I don't know
October 1, 2012

governement
citizens of a place?
October 1, 2012

government
set of land boundaries of a state?
October 1, 2012

Algebra
What is the rule in equation form of an input/output table if the inputs are 2 10 and 6 and the outputs are 2 6 and 4 ?
October 1, 2012

physics
a car traveling at 7 m/s accelerates to a velocity of 12.0 m/s in 2.0s. what is the acceleartion of the car?
September 25, 2012

grade six math
The anser is 7,555,131 its sooo easy
September 13, 2012

math
What is the value of the 3 in .ooo3?
September 9, 2012

Math (cummulative review)
Factor the given polynomial: 3y2+5y-8 the 2 is an exponent...
September 5, 2012

English
'How about painting the wall a new color?' is addressing one person asking a question to a seperate individual. 'How about we paint the wall a new color? is referring to the person asking the question who would like to help the individual with the painting.
August 31, 2012

Health
All of your points sound really good so far. I have another factor that you could add. E. Most likely to develop diabetes due to the result of not eating healthy
August 30, 2012

Health
'C' is the best answer out of all of them. I'd make 'B' a correct answer as well. Both of the liquids are healthy to drink.
August 30, 2012

Fitness And Nutrition
Well, let's go over it. 'A' is the plan that can be followed and used for a long period of time. 'B' is the plan that you have to go to a lot of stores to find one item. It would be tiring after a while. 'C' is the plan that in 1 week you lose, let...
August 6, 2012

chemistry
How Many H bonds in Oblate Polyhedra?
June 29, 2012

trigonometry
write 2=5cis 11pie/6 in standard form.
May 17, 2012

trigonometry
find the dot product of u=2i-7j and v=i+8j
May 17, 2012

trigonometry
given v=5i+3j and w=-4i+8j, find projwv
May 17, 2012

trig
find the single term of cos^2 4theta - sin^2 4theta
May 16, 2012

trig
find the period of f(x)=-2cot x/5
May 16, 2012

Chem
Okay I got the second pH w/HCl and it is 2.23. but still can't find the pH of both of the ones w/HC2H3O2. Please help?
May 7, 2012

Chem
Complete the table below: Note: Make simplifying assumptions, do not use the quadratic formula. What is the pH of the solution created by combining 1.90 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH: 1.90 pH w/HCl...
May 7, 2012

algebra
(6x-2y)/(x^2+xy-2y^2)-(3x+2y)/(x^2+3xy-4y^2)
April 25, 2012

Basic Dressmaking Processes
A Correct 2. D Correct 3. B Correct 4. A C PAGE 6 5. A Correct 6. D Correct 7. C Correct 8. B Correct 9. C Correct 10. D Correct 11. C Correct 12. C Correct 13. A Correct 14. B Correct 15. D Correct 16. C Correct 17. A Correct 18. A Correct 19. B Correct 20. B Correct
April 24, 2012

Math
If you're rolling two dice, what is the probability that the sum of two dice is a 7?
April 15, 2012

math
i try and try to practice for my checkpoints but i keep on failing in them!!!!!!!!!!! what can i do to improve in maths,science and english. please help me practice. I was hoping you could give me the real checkpoint papers for all subjects!! thatcwould be amazing then i'...
April 12, 2012

english
I'm writing a english paper about A Tale of Two Cities to show why/how the topic of law/corruption/power matters from the way Dickens uses it in the text. I am trying to write my intro, but I am having trouble. All I have so far is an attention-getter, a quote. Here is the...
April 5, 2012

Chemistry
Thank you so much! Not I dont think I will fail my test tomorrow!
April 4, 2012

Science
you are to make a buffer of pH = 4.33 using HNO2 and NaNO2 what ratio of NO2- to HNO2 is required?
April 2, 2012

math
The diameter of each tire on Niki's bike is 66 centimeters (cm). It takes her 16 minutes to ride 10 kilometers (km). How fast did Niki ride, in kilometers per hour?
March 25, 2012

11th grade math
A farmer wants to fence in 60 000m^2 of land in a rectangular field along a straight road. The fencing that he plans to use along the road is $10 per meter and the fencing that he plans to use for the other three sides costs $5 per meter. a) How much of each type of fence ...
March 25, 2012

Acoustic and Auditory Physics
Yeah, I am having trouble interpreting it. I think The first resonant frequency fits well within a frequency range where the ear is maximally sensitive makes the most sense
March 18, 2012

Acoustic and Auditory Physics
A resonant frequency is a frequency that resonates within a tube of some length. The first resonant frequency of the average ear canal is around 3,000 Hz. Look at the Fletcher-Munson diagram. Which of the following statements is correct? The intensity level of the first ...
March 18, 2012

geometry
A triangle is inscribed in a circle. One side of the triagle has lenghth 12 cm, and the angle opposite that side measures 30 degrees. What is the diameter of the circle?
March 8, 2012

Algebra 2
On some tubes of caulking, the diameter of the circular nozzle opening can be adjusted to produce lines of varying thickness. The table shows the length (L) of caulking obtained from a tube when the nozzle opening has diameter (d) and cross-sectional area (A). 31) Does L vary ...
March 3, 2012

ap chemistry
what volume of 0.0100 M NaOH must be added to 1.00 L of 0.0500 M HOCl to acheive a PH of 8.00?
March 1, 2012

IUP
A Circular metal loop is 28.0 cm in diameter. how large a current must flow through this metal so that the magnetic field at its center is equal to the earths magnetic field of 5.00*10-5T?
February 29, 2012

calculus
A particle moves in a straight line with velocity given by v(t) =sin t metres per second. Find the total distance travelled by the particle in the first 4 seconds of motion
February 14, 2012

math 7
what is 3/7th of 490
February 7, 2012

math
I have the same problem.
January 30, 2012

english
What argument does the other man use to convince the narrator to team up with him? What lesson do you think the narrator learned by the end of the evening?
January 28, 2012

chemistry
A piece of metal with a mass of 5.50 grams changed in temperature from 25.0 to 55.0C when 21.3 joules was absorbed. The specific heat of the metal is a. 0.256 b. 0.129 c. 3.91 d. 7.75 e. 0.710J g-1 oC-1 desperately need help!
January 23, 2012

Geometry
The midpoint of the segment joining points (a, b) and (j, k) is: (j-a,k-b) j-a over 2 k-b over 2 (j+a,k+b) j+a over 2 k+b over 2
January 16, 2012

Geometry
The midpoint of the segment joining points (a, b) and (j, k) is: (j-a,k-b) j-a over 2 k-b over 2 (j+a,k+b) j+a over 2 k+b over 2
January 16, 2012

math
How can I solve this: Sandy decided to give one-fourth of her CDs to Jenn. Then she gives one-half of the remaining CDs to Bob. If she is left with 6 CDs,how many CDs did she have to begin with?
January 3, 2012

chemistry
How many grams of chlorine gas could be produced by the decomposition of 58.5g of sodium chloride according to the following equation.? 2NaCl = 2Na + Cl2
December 14, 2011

algebra
Find the mean for each set of data. Round to the nearest tenth if necessary 12, 20, 8, 15, 16, 14, 7, 5, 11, 8, 14 i realy need help on this i keep on getting 12 as the median but the answer choices dont have 12, could u guys help me please
December 9, 2011

The Calvin Cycle
How many molecules of CO2 will the calvin cycle consume in generating 2 molecules of fructose 6-phosphate? How many molecules of ATP will the calvin cycle consume in generating 2 molecules of fructose 6-phosphate? How many molecules of NADH will the calvin cycle consume in ...
November 20, 2011

pleez! science stuff
ohhh! thank you thank you thank you! soooooo much i really need it badly :)
November 8, 2011

pleez! science stuff
What is the application be on my project which was "me and my class go out and check the soil for organic things and beans and natural stuff + to describe what it looks like what color,shape,texture, and size the things we found are" PLEEZ! help i still have tons of ...
November 8, 2011

Biochemistry
The malate dehydrogenase reaction, written in the direction as it occurs in the citric acid cycle is: malate + NAD+ → oxaloacetate + NADH + H+ ΔG˚' = +7.1 kcal/mol Calculate the Keq and ΔG (in kcal/mol) for this reaction at the physiologic ...
November 5, 2011

WRITING
Like what bad stuff would happen to the school teachers and people
October 27, 2011

WRITING
Help me get examples of what would happen if there were fiel trips everyday for school for free. Help me come up what bad stuff would happen
October 27, 2011

WRITING
A field trip for free everyday at school. Examples they are bad?
October 27, 2011

Probability math
From a deck of 52 cards, 7 are drawn randomly without replacement. Let X and Y be the number of hearts and spades respectively . a) What is P(X > or = Y)?
October 25, 2011

Probability
Consider the experiment of simultaneously tossing a die and a coin. Let X denote the number of heads and Y denote the number of spots showing on the die. a)construct a two-way table for the joint pdf b)Let Z=X+Y . Use the joint pdf to find the distribution or Z.
October 25, 2011

math
What is the ratio formed between two parallelograms one is 2 inches by 6 inches and the other is 6 inches by 18 inches?
October 24, 2011

physics
we know that the speed of light in a vacuum is 3.0 x 10^8 m/s (18,000 mi/sec). If light travels through thick plastic with a speed of 1.75 x 10^8 m/s, what is the index of refraction through plastic?
October 24, 2011

physics
we know that the speed of light in a vacuum is 3.0 x 10^8 m/s (18,000 mi/sec). If light travels through thick plastic with a speed of 1.75 x 10^8 m/s, what is the index of refraction through plastic?
October 24, 2011

physics
An object is located 87.6 cm from a concave mirror that has a focal length of 17.0 cm. Where is the image located?
October 24, 2011

Chemistry
Nitrogen dioxide, NO2, dimerizes easily to form dinitrogen tetroxide , N2O4 : 2NO2<===>N2O4 a) Calculate Change in reaction G* and K for this equilibrium. b) Calculate the (e) (the measure of the progress of the reaction) for this equilibrium if 1.00 mol NO2 were present...
October 20, 2011

chem help
if 20 ml of .025M Formic acid is combined with 30 ml of distilled water and titrated with .10 M NaOH. What is the theoretical endpoint (equivalence point)
October 19, 2011

Chemistry
if 20 ml of Formic acid is combined with 30 ml of distilled water and titrated with .10 M NaOH. What is the theoretical endpoint (equivalence point)
October 18, 2011

Social Studies
Can you?
October 18, 2011

Social Studies
Hollywood sign. You can just look these up on Google :D There is a lot of answers
October 18, 2011

Social Studies
Thanks (:. What famous sign was first erected in 1923 in the state of California?
October 18, 2011

Social Studies
In 1950, what west coast team became an official member of the NFL?
October 18, 2011

Physics
An airplane pilot sets a compass course due west and maintains an airspeed of 221km/h . After flying for a time of 0.490h, she finds herself over a town a distance 125km west and a distance 13km south of her starting point. FIND THE MAGNITUDE OF WIND VELOCITY. v = ___ km/h
September 26, 2011

Astronomy
Star 'A' has twice the radius of star 'B'. The ratio of the surface area of star 'A' to the surface area of star 'B' is equal to 8 4pi 2 1/8 4
September 25, 2011

UCSD
A jetliner is moving at a speed of 230 m/s. The vertical component of the plane's velocity is 36.4 m/s. Determine the magnitude of the horizontal component of the plane's velocity.
September 24, 2011

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