Monday

February 8, 2016
Total # Posts: 3,560

**Chemistry**

Calculate the area in square meters of a circular skating rink that has a radius 11.2m. The relationship btwn the (A) and the radius (R) is A=
*January 22, 2013*

**Physics**

A 2kg object is attached to a spring and undergoes simple harmonic motion. At t=0 the object starts from rest, 10 cm from the equilibrium position. If the force constant of the spring k is equal to 75 N/m, calculate a. the max speed b. the max acceleration of the object. Fine ...
*January 21, 2013*

**algebra/trigonometry**

x+5 over 7 divided by 4x+20 over 9
*January 21, 2013*

**Microeconomics**

ADVANCED ANALYSIS Assume the following values for Figures 5.4a and Figures 5.4b. Q1 = 20 bags. Q2 = 15 bags. Q3 = 27 bags. The market equilibrium price is $45 per bag. The price at a is $85 per bag. The price at c is $5 per bag. The price at f is $59 per bag. The price at g is...
*January 19, 2013*

**Calculus**

Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. The diagonal of the square before...
*January 19, 2013*

**Microeconomics**

Discuss the ethics of using unconscious nudges to alter people's behavior. Within your answer, consider the argument made by economists Richard Thaler and Cass Sunstein, who favor the use of nudges. Could nudges be avoided? Do all policies contain some unconscious nudges ...
*January 18, 2013*

**math**

a time capsule is in the shape of a cylinder with a hemisphere at each end. if the capsule is surrounded with a metal outer layer 4 cm thick as shown( there's a picture) then determine the volume of the metal outer layer. round your answer to the nearest cubic centimeter. ...
*January 15, 2013*

**Chemistry**

Can someone please tell me the heat of fusion for Lauric Acid, Oxalic Acid, and Cetyl Alcohol? I've looked and can't find them anywhere! Thanks!
*January 13, 2013*

**Math**

3x/5 - x/2
*January 10, 2013*

**Math**

Lyn is 7 years old. Rose is 2 years less than twice as old as Lyn. What is the sum of their age?
*January 7, 2013*

**math**

thank you :D it helped me understand
*January 4, 2013*

**math**

you put 390 instead of 290 for the perimeter why? it has me a bit confused.
*January 4, 2013*

**math**

i didn't see it before thank you for answering my question it helped :D
*January 4, 2013*

**math**

A rectangular field is 35 m longer than it is wide. The length of the fence around the perimeter of the field is 290 m. What are the dimensions (length and width) of the fence?
*January 4, 2013*

**math**

A rectangular field is 35 m longer than it is wide. The length of the fence around the perimeter of the field is 290 m. What are the dimensions (length and width) of the fence?
*January 4, 2013*

**ap chem**

What type of experiment can be done to determine if a material is paramagnetic?
*January 2, 2013*

**ap chem**

in a sigma antibonding orbital where are the electrons most likly to be found in relation to the nuclei in a bond?
*January 2, 2013*

**ap chem**

The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? If not, what is the spatial relationship? Explain. ...
*December 28, 2012*

**Math**

The length of each side of an equilateral hexagon is a whole number, and the length of each side of an equilateral octagon is a whole number. Both have the same perimeter. The perimeter must be a multiple of 16 ,18, 24,30 or 36 ?
*December 20, 2012*

**calc volume**

find the volume of a solid formed when the region bounded by y = e^(x-3) and y = 1 + ln(x) is rotated about the y-axis.
*December 19, 2012*

**math**

x(x+2)= 35 x^2 + 2x - 35 = 0 (x - 5)(x - 7) = 0 x = 5, 7
*December 17, 2012*

**math**

There are two 100-foot poles. A 150-foot rope connects them at the top. The bottom of the rope hangs to 25 feet from the ground. How far apart are the poles?
*December 17, 2012*

**math**

jake jumped 3 feet. Marco jumped 5 feet. Peter jumped 4 feet. How much farther did Jake and Peter than MArco? Explain how you found your answer.
*December 10, 2012*

**Math **

Find the value of each expression using the pemdas method. 5(to the second power)+8 divided by 2
*December 9, 2012*

**physics**

Two particles A and B have velocities 3^i and v^j respectively (in m/s). (a) Find rBjA; the position of B relative to A for all t given that rBjA(t = 0) = 9^i + 6^j (in metres). (b) Find the value of v such that A and B collide. (c) If v = 1 m/s, nd the time and distance when ...
*December 6, 2012*

**Physics- Elena please help!**

Junior in College
*December 5, 2012*

**Physics- Elena please help!**

I don't understand how to do it, you dont need to be mean about it. I am asking for someone else's help.
*December 5, 2012*

**Physics- Elena please help!**

An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. (a) What is the sound intensity during the day ? (Reminder: If you choose to use ...
*December 5, 2012*

**Physics- Please Help, soooo lost!**

Two pipes of equal length are each open at one end. Each has a fundamental frequency of 715 Hz at 300 K. In one pipe the air temperature is increased to 313 K. If the two pipes are sounded together, what beat frequency results?
*December 4, 2012*

**Biostats**

What statistical method(s) a researcher can use to determine if the mean body mass index of the population is the same for three groups of subjects (group i=diet restriction; group 2=exercise; group 3=none).
*December 4, 2012*

**Biostats**

What statistical methods a researcher can use to determine if weights of the children in pounds are normally distributed or not?
*December 4, 2012*

**Legal Issues in Health Sciences**

You are the head of the health information management department at a hospital. An FBI agent has arrived at your office with a search warrant in hand. He asks to speak with you about the hospital's helth records. How should you respond?
*December 2, 2012*

**history ASAP**

1900's
*December 2, 2012*

**history ASAP**

why did the environmental movement prove to be so divisive? Whose interest were threatened?
*December 2, 2012*

**7 th grade math**

A phone call cost $3 minute Imput (x) rule output(y) 1 5 10 20
*December 1, 2012*

**Math**

can not be simplified any further unless you want 1 and 5/7
*November 29, 2012*

**chemistry**

Cisplatin, a drug used in the treatment of certain types of cancer has the molecular formula Pt(NH3)2Cl2. How many moles of compound are in 254.09 grams of the compound?
*November 29, 2012*

**US Government **

Using a graphic organizer describe the conditions of American citizenship
*November 29, 2012*

**PHYSICS - PLEASE HELP**

Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A man ...
*November 28, 2012*

**PHYSICS - PLEASE HELP**

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?
*November 28, 2012*

**Phy**

A 17kg child slides down a 2.7m -high playground slide. She starts from rest, and her speed at the bottom is 1.8 m/s. What is the change in the thermal energy of the slide and the seat of her pants?
*November 28, 2012*

**probability**

the one that says sum: and ways: that is what the book says!
*November 27, 2012*

**probability**

two fair six-sided dice are rolled and the sum of the dots on the top faces is recorded. a) complete the table, showing the number of ways each sum can occur sum: 1 2 3 4 5 6 7 8 9 10 11 12 ways:1 2 3 b)use the table to find the probability of the following events. A:the sum ...
*November 27, 2012*

**math**

yancey collects plastic banks. He has three different banks: a pig,a cow and a horse. How many ways can Yancey arrange his banks on a shelf?
*November 27, 2012*

**Physics**

Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A man ...
*November 27, 2012*

**Social Studies**

what are the correct answers?
*November 27, 2012*

**chemistry**

Balance the following equations. Show all work. MnO4- + Zn -> Mn2+ + Zn2+
*November 27, 2012*

**Statistic**

In chi square goodness of fit test, if the expected frequencies, and the observed frequencies were quite different, we could conclude that: A) null hypothesis is false, and we would reject B) chi square distribution is invalid, and use t distribution instead C) alternate ...
*November 27, 2012*

**physics**

12. The ratio of the tensile (or compressive) strength to the density of a material is a measure of how strong the material is “pound for pound.” (a) Compare tendon (tensile strength 80.0 MPa, density 1100 kg/m3) with steel (tensile strength 0.50 GPa, density 7700 ...
*November 26, 2012*

**STATISTICS**

Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of all test takers score at or between 145 and 155, and about 70 percent score at or between 140 and 160. The full range of scores is 60 pts (120–...
*November 26, 2012*

**chem**

the max # of grams of K that can be obtained from 100.grams of KHCO3?
*November 24, 2012*

**chemistry**

At what temperature would you expect dinitrogen pentoxide to sublime? N2O5(s)-->N2O5(g) N2O5(s)= DELTA H -43.1 N2O5(s)= S (J*K1-*MOL1-)= 178.2 N2O5(g)= DELTA H 13.3 N2O5(g)= S (J*K1-*MOL1-)=355.7 where do i start here?
*November 24, 2012*

**chemistry**

Balance this chemical equation. Cr2O7 2-(aq) + Cu(s)---> Cr3+(aq) +Cu2+aq) I don't understand how to do this problem. Where do i begin? thank you.
*November 24, 2012*

**Leading Innovation Global Organization**

define and analyze ways in which innovation at HCL Technologies will likely be influenced by trends shaping global markets.
*November 21, 2012*

**Microsoft Infrastructure**

You remember learning that remote RADIUS server groups offer some benefits to a network with multiple RADIUS servers. Research those benefits and decide if making changes to your network is necessary. Describe the findings of your research concerning the benefits of remote ...
*November 21, 2012*

**Algebra**

6/24 of 1/2 would be 3/12
*November 20, 2012*

**history ASAP**

in what sense did the us seem to be developing into two nations in the 1950 and 1960's . What was really happening ? Did it stop ? why?
*November 18, 2012*

**math**

how many lines can connect 3 coplanar points?
*November 18, 2012*

**intermediate accounting**

purchase of a machine for $2000 was expensed. The machine has a four year life , no residual value , and straight line depreciation is used how to write journal entry?
*November 17, 2012*

**intermediate accounting**

goods in transit, purchased on credit and shipped FOB destination. $10000 . were included in purchases but not in the ending inventory? how would you write this journal entry.( this company uses periodic inventory.
*November 17, 2012*

**Math**

A cubic centimeter is the same as 1 mL. If a humpback whale has more than 1 kL of blood, how many cubic centimeters of blood does the humpback have?
*November 16, 2012*

**chemistry**

what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?
*November 14, 2012*

**chemistry**

what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?
*November 14, 2012*

**english**

Is this sentence correct? A sheet lied on the rug to catch paint splatters.
*November 14, 2012*

**Business**

I would like you to explain the implications of the article and apply some aspects of the article in a paragraph, like implicating imformation about the article.
*November 13, 2012*

**Business**

Explain, in several paragraphs (no more than four), the implications of the Malcolm Gladwell article, "How David Beats Goliath." Apply some aspects of the article to your experience and future.
*November 13, 2012*

**Chemistry**

How many grams are in 50.0 mL 2.0 M of HCl? Please help me!!! I think the answer is 3.57g but I am not sure. Thank you :)
*November 13, 2012*

**Windows Infrastructure**

You need to download a large document (100 Mb) from your local network. This document contains the blueprints for a multi-million dollar invention and should not fall into the hands of competing companies. Which should you use to download this document: a dial-up connection or...
*November 13, 2012*

**physics**

an arrow was shot at a suspended clay target. the original KE the arrow was shot with was 2.0 J. the final KE from the arrow-target collision was 0.2 J. What happened to the original KE of the arrow? Give at least four possible ways in which this KE could have been lost. I ...
*November 12, 2012*

**Physics B**

A 89.2 kg ice skater, moving at 16.1 m/s, crashes into a stationary skater of equal mass. After the collision, the two skaters move as a unit at 8.05 m/s. Suppose the average force a skater can experience without breaking a bone is 4296 N. If the impact time is 0.096 s, what ...
*November 12, 2012*

**Physics B**

Part 1 Calculate the magnitude of the linear momentum for each of the following cases: A proton with mass 1.67×10 −27 kg moving with a speed of 5.24 × 10 6 m/s. Answer in units of kg · m/s Part 2 A 15.1 g bullet moving with a speed of 327 m/s. Answer ...
*November 12, 2012*

**trig**

(1 + sinx)(secx - tanx) = cos x
*November 11, 2012*

**trig**

tan^2x/1 + tan^2x = sin ^2 x
*November 11, 2012*

**trig**

cos^2 A/ 1+sin A
*November 11, 2012*

**Precalculus**

The question(s) are as follows: Given: f(x) = 3cos(3x+π) - 4 Find: a) the inverse of F(x) b) the domain and range of F(x) c) the domain and range of F -1(x) I got cos-1[(x-4)/9] - π = y for the inverse, although I'm not sure I did the problem right (I set x to y ...
*November 11, 2012*

**algebra**

The basic formula is rate x time = distance. Since the freight train and the passenger train are traveling the same distance, the rate x time for each train equals the other. Let t = the time for the freight train. Then t-2 would equal the time for the passenger train, since ...
*November 11, 2012*

**Precalculus**

The question(s) were as follows: Given: f(x) = 3cos(3x+π) - 4 (as you thought) Find: a) the inverse of F(x) b) the domain and range of F(x) c) the domain and range of F -1(x) I got cos-1[(x-4)/9] - π =y for the inverse, although I'm not sure I did the problem ...
*November 11, 2012*

**Precalculus**

How would I go about finding the domain and range of 3cos(3x+π) = 4? Thanks
*November 11, 2012*

**social studies**

The Demographic Transition Model
*November 11, 2012*

**maths**

find the whole number solutions to each of these inequalities. q1. 3<2x-1≤17 q2. 5≤g-3≤12 q3. 8<5c≤20
*November 11, 2012*

**Sociology**

This unit we learned about the various social statuses in the U.S. Identify and describe each status. How are they similar and how do they differ? Into which social status do you fit and why do you feel this way
*November 9, 2012*

**Economics**

The slope of the consumption function equals: A. 1-MPS B. 1/(1-MPS) C. 1-MPC D. MPC/MPS E. MPS
*November 9, 2012*

**Economics**

Consider the simple economy of Behr, whose government does not tax its citizens. The consumption function of Behr is given by: C=500+.8Y, where Y is income. the autonomous consumer spending in this economy is: A. $1000 B. $800 C. $500 D. $.80 E. $1800
*November 9, 2012*

**Algebra**

What is the rule?? INPUT OUTPUT ______ 12 9 ______ ______ 6 ______ 16 7 _______
*November 7, 2012*

**Physics B**

Objects with masses of 105 kg and 528 kg are separated by 0.482 m. A 41.1 kg mass is placed midway between them. 0.482 m b b 105 kg 41.1 kg 528 kg Find the magnitude of the net gravitational force exerted by the two larger masses on the 41.1 kg mass. The value of the universal...
*November 6, 2012*

**Science **

A 52kg tricyle left a child's yard at 3m/52. What is its force ?
*November 6, 2012*

**geography**

omg thanks i needed help on that one too! still working on the other parts
*November 4, 2012*

**stats**

if you know the mean and standard deviation, how do you determine the proportion that will and will not be included
*November 4, 2012*

**Physics B**

part 1 A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the coordinate system as follows: a 1.5 kg object at the origin, a 3.4 kg object at (0 m,1.8 m), and a 4.5 kg object at (4.2 m,0 m). THANK YOU!! Find the ...
*November 4, 2012*

**Physics B**

A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the coordinate system as follows: a 1.5 kg object at the origin, a 3.4 kg object at (0 m,1.8 m), and a 4.5 kg object at (4.2 m,0 m). Find the resultant gravitational ...
*November 4, 2012*

**Math**

Jane is x years old today. Her brother Kenny is 4 years older. After seven years their total combined age will be 24 years. Write a linear equation for their total combined age after seven years. Fine James age today.
*November 3, 2012*

**Math**

There are 40 questions on a class test. Six points are given for each correct answer and three points are deducted for each wrong answer. Find the number of correct answers for a test score of 105.
*November 3, 2012*

**chemistry**

Calculate the grams of solute needed to prepare each of the following. 55.0 ml of a 6.50 hcl solution.
*November 2, 2012*

**Physics B**

An air puck of mass 0.289 kg is tied to a string and allowed to revolve in a circle of radius 0.51 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.98 kg is tied to it. The suspended mass ...
*November 1, 2012*

**Physics**

An air puck of mass 0.289 kg is tied to a string and allowed to revolve in a circle of radius 0.51 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.98 kg is tied to it. The suspended mass ...
*November 1, 2012*

**7th grade math ASAP please**

2 is 43:51 4 is 15 packs for 3.95 10 is NO IDEA!!! Sorry for the last question but I hope I was a help on the first 2!!! :D Good luck on your Maths homework!! :D
*October 30, 2012*

**college algebra**

list the intercepts and test for symmetry. y=-8x/x^2=49
*October 28, 2012*

**financial accounting**

The lake theater opened on april 1.all facilities were completed on march 31. During april,the following events and transactions occured. Apr.2 paid film rental of $800 on first movie. 3 ordered two additional films at $1,000 each. 10 made $2,000 payment on mortgage and $1,000...
*October 27, 2012*

**Physical Science**

Sound travels about 1530 m/s in sea water. How many times faster does sound travel in sea water than in air? (The speed of sound in air at 25°C is about 345 m/s.)
*October 24, 2012*