Tuesday
September 30, 2014

Posts by Mary


Total # Posts: 3,254

physics
Find the coefficient of static and kinetic friction of a block on a table surface. The mass of the weight is 200g and with the friction block overall the mass is 0.3 kg. With a spring scale we found Fs to be 1N and Fk to be 0.8N. Draw free body diagram.
January 28, 2013

intermediate math
the length of a rectangular plot of land is 4 times the width. of the perimeter is 600 feet, find the dimensions of the plot
January 28, 2013

Economics
a firm in a purely competitive industry is currently producing a 1000 unir per day at a total cost of $450. if the firm produced 800 units per day, it total cost will be $300, and it it produced 500 units per day, it total cost will be $275. Requirements: (1) what are the firm...
January 27, 2013

business law
Fred and Wilma are neighbors. Every morning Fred walks his dog spike by Wilma's house, and almost every morning Spike poops in Wilma's yard. A city ordinance requires that dog oners must keep their dogs on a leash, but Fred never uses a leash while walking Spike. The ...
January 26, 2013

Math
Adam drew two same size rectangles and divided them into the same number of eqal parts. He shaded 1/3 of one rectangle and 1/4 of the other rectangle. What is the least number of parts into which both rectangles could be divided?
January 24, 2013

Introduction to management
Young, innovative, or high-tech firms often adopt the strategy of ignoring history or attempting to do something radically new. In what ways might this strategy hinder them?
January 24, 2013

Math
What would be the geometric shape of a mansard roof?
January 24, 2013

math
the lateral area of cylinder is 96ð. if h=12, find r
January 24, 2013

Biology
What piece of evidence would actually allow us to measure the actual rate at which continental drift is occurring?
January 23, 2013

biology
what is theoffspring of a yellow seed and a green seeds genotype and phenotype?
January 23, 2013

Chemistry
How do you draw Al2 + O2
January 22, 2013

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

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

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

math
6*2
November 15, 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

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