Monday
March 2, 2015

Posts by Jay


Total # Posts: 1,161

College Physics.
A pendulum has a period of 1.8 s. a) Its mass is doubled. What is its period now? b) Its length is doubled. What is its period now? The original pendulum is taken to a planet where g = 16 m/s2. c) What is its period on that planet?
July 18, 2010

College Physics 121
A spring with a spring constant k = 50N/m has an unstretched length of 20cm. Find the work required to stretch the spring to a length of 30 cm. W = J ?? any help guys?
July 18, 2010

physics hw need help
A disk with a radial line painted on it is mounted on an axle perpendicular to it and running through its center. It is initially at rest, with the line at q0 = -90°. The disk then undergoes constant angular acceleration. After accelerating for 3.1 s, the reference line ...
July 14, 2010

Physics 121 HW
A sign has a mass of 1050 kg, a height h = 1 m, and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. A guy wire at 23° to the horizontal holds the sign to the wall. Note that the distance from the left edge of the sign to the ...
July 14, 2010

physics 121 hanging sign
do i need to do the x,y for the rod?
July 14, 2010

physics 121 hanging sign
how would i find that? divide the mass by the weight of the wire?
July 14, 2010

physics 121 hanging sign
i got .227 but its the wrong answer?
July 14, 2010

physics 121 hanging sign
A sign has a mass of 1050 kg, a height h = 1 m, and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. A guy wire at 23° to the horizontal holds the sign to the wall. Note that the distance from the left edge of the sign to the ...
July 14, 2010

Physics 121
how do i find the hight for b?
July 14, 2010

Physics 121
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 2.7 m down a q = 23° incline. The sphere has a mass M = 4.8 kg and a radius R = 0.28 m. a) Of the total kinetic energy of the sphere, what fraction is translational? KEtran/...
July 14, 2010

finance
Your best taxable investment opportunity has an EAR of 4%. Your best tax-free investment opportunity has an EAR of 3%. If your tax rate is 30%, which opportunity provides the higher after-tax interest rate?
July 14, 2010

Chemistry
Haloacetic acids are the most acidic when the molecule is A. stable B. unstable dihedral angle is A. intermediate B. 0 C. 180 conformation is A. SYN B. ANTI C. neither
July 12, 2010

alg
$3.79
July 12, 2010

BIOLOGY
In general, the frequency of APs in an afferent neuron is related to the amplitude of the receptor potential in the following way: a. exponentially. b. there is no general relationship. c. logarithmically. d. linearly. thx
July 12, 2010

math
what is the probability of selecting an eight followed by a nine from a deck of 52 cards if the first card is replaced before second is drawn? please help me.
July 11, 2010

math
A scientist wants to combine two metal alloys into 20 kg of a third alloy which is 60% aluminum. He plans to use one alloy with 45% aluminum content, and a second alloy with 70% aluminum content. How many kilograms of each alloy must be combined?
July 5, 2010

Physics
hey, thanks a lot.
June 30, 2010

Physics
Two vectors A. and B have magnitude A = 3.00 and B = 3.00. Their vector product is A x B= -5.00k + 2.00i. What is the angle between A and B?
June 30, 2010

chemistry
The pH of a solution is measured to be 5.4. Calculate the following: a) [H3O^+] b)pOH c)[OH^-]
June 28, 2010

chemistry
Calculate the pH of the solution made by dissolving 8.00 g of lactic acid.
June 22, 2010

organic chem
extraction lab: suppose that aqueous and organic (diethyl ether) layers were not mixed thouroughly predict the effect that this would have on the results in your answer, consider melting point temperature of benzophenone thx
June 16, 2010

Business
Which economic system is the best solution to handling a crisis of epic proportion?
June 16, 2010

organic chemistry
recrystallization question: a student's correctly calculated value for the % recovery of purified unknown solid was 102%. assume that the student performed all steps of procedure correctly. a) comment on the validity of the result (include reasons). b) suggest possible ...
June 14, 2010

math
how to make a tally chart for the number of students in the third, fourth and fifth grade classes 26,25,27,27,26,28,27
June 10, 2010

child growth development
Researchers have concluded that A. the proportion of REM sleep to N-REM sleep is similar in infants and adults B. REM sleep provides needed brain stimulation to neonates C. REM sleep is mostly absent in neonates D. the proportion of REM sleep to N-REM sleep increases as a ...
June 10, 2010

economics
what preceding example?
June 6, 2010

algebra
can you show me how to log 36=x
June 6, 2010

chemistry; kinetics
wrong 8.0x10-4
May 29, 2010

economics
If the price level increases, other things constant, consumption spending
May 23, 2010

chemistry
A is the correct answer I just tried it right now.
May 16, 2010

chemistry(check my answer)
its kf,kr, the value of forward rate and reverse rate.
May 14, 2010

Geometry
How do you fine the perimeter of a parallelgram with the following data known: Top = x+3 LSide = x+3 RSide = 17
May 8, 2010

British Lit----URGENT
i think it is supernatural if it is not please tell us the right answer:)
May 8, 2010

PHYSICS
Three small spheres are placed at fixed points along the x-axis, whose positive direction points towards the right. Sphere A is at x = 23.0 cm, with a charge of -10.00 microCoulomb Sphere B is at x = 55.0 cm, with a charge of 2.00 microCoulomb Sphere C is at x = 57.0 cm, with ...
May 4, 2010

PHYSICS
sorry it was suppose to read with a charge of -10 microCoulombs for sphere A, 2 microCoulombs for sphere B and -9 microCoulombs for sphere C.
May 3, 2010

PHYSICS
Three small spheres are placed at fixed points along the x-axis, whose positive direction points towards the right. Sphere A is at x = 23.0 cm, with a charge of -10.00 ìC. Sphere B is at x = 55.0 cm, with a charge of 2.00 ìC. Sphere C is at x = 57.0 cm, with a ...
May 3, 2010

Accounting
What conclusions can be drawn about the frequency of compounding interest? What conclusions can be drawn about the length of time an amount is compounding?
April 23, 2010

Chemistry
What is the product of a grignard reaction of bromotoluene and co2 as starting materials?
April 20, 2010

Math
find the vertex of (x+1)^2-2
April 15, 2010

Chemistry
the student stopped the first careful titration when a deep pink color was obtained in the flask. On the second trial, the student stopped when a light pink color was obtained. On the third trial, the pink color obtained was very faint and noticeable only when the flask was ...
April 13, 2010

Calculus
show the following linearization of the function f(x)=cos(3x)-3sin(3x) at x=2pi
April 7, 2010

Calculus
find second derivative of f(t)=inverse cos(4t)
April 7, 2010

computer science
in one the chapter 3 programming challenges you were asked to write a program that converts a celsius temperature to fahrenheit. Modify that program so it uses a loop to display a table of celsius from 0 to 20 and their Fahrenheit equivalents.
April 5, 2010

Electrical Engineering
At what frequency is a 0.0001 uF capacitor operating if its reactance is 45 k ohm?
April 4, 2010

Electrical Engineering
what is one time constant of a 47 micro farad capacitor in series with a 120 kilo ohm resistor?
April 3, 2010

Chemistry
1)How many mL of H2O2 are in 969 mL in solution ? * Given: 5.0% of H2O2 by volume. 2)What is the mole fraction of the solute in a 1.35m solution of CaCl2?
April 3, 2010

geometry
Your math classroom has 4 computers in it. There are 18 students in the class. What is the ratio of computers to students? whats the equation ?
March 22, 2010

8th grade
To the nearest tenth, what is the volume of a cone with a diameter of 2.4 inches and height of 10 inches?
March 21, 2010

Social Studies
What was Josef Stalin's scapegoat? Im assuming it is the Bolshevik's and he took care of them through mass purging.
March 21, 2010

Social Studies
Thank you.
March 21, 2010

Social Studies
Well Im assuming the answer is that in order to become a dictator period, they need something, the scapegoat, in order to give a reason for all of the ills of the said country, for example, Adolf Hitlers blaming of the Jews and other minorities for all of the problems of Nazi ...
March 21, 2010

Social Studies
Why do you think dictators need to find scapegoats for their nation's ills? Explain.
March 21, 2010

computer science
i dnt have anything. im totally lost
March 10, 2010

computer science
write a program that calculates a customer's monthly bill. it should input customer name, which package the customer has purchased, and how many hours were used. it should then create a bill that includes the input informtion and the total amount due. the bill should be ...
March 10, 2010

education
A major goal of a child's transition to a new program is to: a.meet new people b.learn new skills c.meet new teachers d.transfer skills
March 8, 2010

math
two look out situations, which are 25 miles apart along the coast on a north-south shoreline, spot an approaching yacht. One lookout station measures the direction to the yacht at N33 degrees E, and the other station measures the direction of the yacht at S62 degrees E. How ...
March 7, 2010

math
Could you use doubling to multiply 7x 3? explain
March 2, 2010

home economics
nice
February 25, 2010

CHEMISTRY
How many moles of methanoic acid you have in a 25g sample of ethanoic acid
February 23, 2010

french
Je Suis Allee A Le Centre Commercial
February 20, 2010

science
sorry if you can't see the other words. they are Hammer faucet axle hinge
February 11, 2010

science
What do the words in the left column have in common that is not shared by any words in the right column? Ramp Hammer Faucet screw axle chisel hinge doorstop
February 11, 2010

English
Well i read most of the stuff online, and it seems as he a hero is b/c he took over the boat but also isn't b/c apparently he was short tempered and crazy. I can go both ways but i don't have enough resources to back my paper up.
February 10, 2010

English
Is fletcher christian an enlightenment hero? i need to write a paper about this and I have a clue what to write. Please Help!!
February 10, 2010

Chemistry
No that's correct. Im having trouble finding the # atoms/unit cell.
February 8, 2010

chemistry
Describe how to prepare a 1M solution of sodium hydroxide from concentrated sodium hydroxide (17.6 M)
February 8, 2010

alegebra
when do sky divers use decimals ?
February 3, 2010

Philosophy
What are we required to do and why are we required to do it? Define how the following theories attempt to provide an answer to the question above Natural Law, Virtue Ethics, and Contract Theory
January 26, 2010

CHEM
rank the fallowing elements by increasing atomic radius: carbon, aluminum, oxygen, potassium. please help!
January 24, 2010

CHEM
can u rank the fallowing elements by increasing electronegativity: sulur, oxygen, neon, and aluminum. please help!
January 24, 2010

algebra
wow... this is in algebra? how come i nvr got i problem like this? and i was just in it last year!.....sorry, i dnt know...i dnt knw why i posted this as an answer tho XP....
January 20, 2010

challenges in the Classroom
Respond to the following in 200 to 250 words. In your opinion, what are the most challenging obstacles teachers face when managing the classroom? What strengths do you possess that will help you meet and overcome those challenges?
January 20, 2010

Physics
A precious-stone dealer wishes to find the specific heat capacity of a 0.036-kg gemstone. The specimen is heated to 95.0°C and then placed in a 0.17-kg copper vessel that contains 0.086 kg of water at equilibrium at 25.0°C. The loss of heat to the external environment ...
January 18, 2010

stratagies for success
how can i describe an organization that may contribute to my professional knowledge?
January 11, 2010

Biology
Hi! If I have two plants with the genotypes Rrtt and rrTt where red color(R) is dominant over white(r) and being tall(T) is dominant over being short(t).If I complete a Punnet square, will it look loke this: R r r r t Rt rt T rT rT t rt rt t rt rt How can I diagram a cross ...
January 8, 2010

Calc II
dont forget that when you square a - number it becomes positive
December 13, 2009

Accounting
How would the exchange of stock for land be handled on a cash flow statement?
December 6, 2009

math
A neumber sentence has an equal sign, and is a sentence as long as it holds true ex true:3+7=10 False: 13+1=15 an expession does not have an equal sign ex: 3+4/5*3
December 1, 2009

8th grade Algebra I (junior level math)
Hello, I am currently in Unit 4-1 (Ratio, and Proportions) and I don't understand how pairs of ratios could form proportions. Could someone give me step by step instructions? Thank You
December 1, 2009

English
I'm writing an essay on March by Geraldine Brooks. My thesis statement is: Through the use of diction and syntax, Geraldine Brooks creates two women (Marmee and Grace) who initially represent two extremes of the same person. They are virtually more alike than different. I ...
November 29, 2009

science
How to present a grassland biome?
November 29, 2009

BUAL
.9664
November 24, 2009

10th grade [URGENT]
Create a journal of your fat intake over a two-day period. Prepare a brief analysis of your fat intake. In your analysis, answer the following questions: How many total grams of fat did I consume? How much saturated, unsaturated and trans-fats did I consume? Was my fat intake...
November 20, 2009

math
when making a circle graph how do you determine the number of degrees for 28%?
November 19, 2009

Psycology
Describe how hormones masculinize or feminize sexual development and behavior.
November 19, 2009

algerbra(college)
solve the system of equations by graphing -3x - 2y=24 3x-y=-6
November 19, 2009

media and cultural studies
‘Sports in the United States are male-dominated and exploit young athletes’ bodies, leaving most of them uneducated, injured, and impoverished.’ Discuss.
November 13, 2009

algabra
x = 187.5 Do it backwards.... 125 x 3 375 375/2 187.5
November 8, 2009

math
Put the PSP Down and do your homework.
November 8, 2009

math
34 per month minus 10 per month is 24. 24 divided by 2 (it was doubled on his 10th Bday) is 12 per month. Just do it backwards. answer is 12 per month.
November 8, 2009

economic
I HAVE AN ASSIGNMENT WHERE I HAVE TO PLOT POINTS ON A GRAPH IN EXCEL, THE INFORMATION GIVEN IS QS=2P-20 AND QD=80-2P AND I WAS TOLD TO USE PRICES 10,20,30,40,50 AND QUANTITIES 5,10,15,20,25,30,35,40 FOR THE GRAPH. I HAVE NO CLUE WHAT TO DO FOR THE CHART IN EXCEL
November 7, 2009

Grammar and Composition
i'm working on the exact same essay. i need help too.
November 3, 2009

3rd grade
Dean works with baby animals at a Zoo. This week he measured a giraffe, an ape and a tiger. The tiger had grown 4 inches less than the giraffe. The giraffe had grown twice as much as the ape. The baby ape had grown 6 inches since it was measured the last time. How many inches ...
October 24, 2009

business law
Identify and discuss the legal, ethical, and technological concerns of the accounting and financial reporting of businesses.
October 20, 2009

chemistry
write out the electron configurations for each of the metallic ions: 1. Ba^2+ 2. Cu^2+ 3. Li^+ 4. K^+ 5. Sr^2+ 6. Ca^2+ 7. Na^+
October 18, 2009

world history
how was propoganda used in world war 1
October 7, 2009

world history
What were the attitudes of france bitain usa toward germnay in the peace conferance? what were the main pooints aginst germnay in the treaty versailles?
October 7, 2009

math
Help me I am lost? I do not even know where to start: The shorter leg of a 30°–60°–90° triangle is 12. What are the lengths of the longer leg and the hypotenuse, to the nearest tenth?
October 7, 2009

Math
AB "union" AC, is a line, what is true about A,B and C
October 7, 2009

statistics
A blood donor center conducted a study over a one year period and found that an average of 55 donors per day checked in to the center. What is the probability that on any given day more than 75v donors will check in?
October 4, 2009

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