Questions Asked on
April 22, 2011

Physics
A 100kg box is suspended from two ropes; the left one makes an angle of 20degrees with the vertical, and the other makes an angle of 40degrees. What is the tension in each rope. I think I've got the basics: I have Fx=T1(x) + T2(x)= 0 to calc the first
asked by Stephanie 
physics
the tension in the wire is decreased by 19%. The percentage decrease in the frequency will be?
asked by sagar patil 
Algebra
Graph the line whose xintercept is 8 and whose yintercept is 7
asked by Shay 
Chemistry
A 237 g piece of molybdenum, initially at 100.0°C, is dropped into 244 g of water at 10.0°C. When the system comes to thermal equilibrium, the temperature is 15.3°C. What is the specific heat capacity of molybdenum?
asked by Lindy 
English
Correct following Sentences: 1. Seeing the barrels, the driver immediately slammed on his brakes. 2. A really wellstocked bookshelf should have classical literature on it as well as important modern works of the current day. 3. China’s enormously huge
asked by Ruba 
MATH
Ten different letters of an alphabet are given .2 of these letter are followed by two digits are used to number the product of a company .in how many ways product can be numbered? ANS CHOICES ARE 52040 8100 5040 1000 4000
asked by michele 
math
Luisa and Connor had $360 altogether. after conner gave Luisa 3/5 of his money, she had the same amount of money as he did. how much did conner have in the beginning?
asked by kaykay 
Physics
A block of mass 5kg is lifted 2m in 3sec. Find the work done.
asked by Andy 
chemistry
If tums is added to 20.0 mL of 0.400 M HCl solution, how many grams of CO2 gas are produced?
asked by Starlit 
physics
An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,
asked by niki 
Calculus
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=2y^2 y=1 x=0 about the yaxis
asked by Loree 
Algebra 2
A rectangular field is to be enclosed by 300 feet of fencing. Find the dimensions of the enclosure that maximizes the area.
asked by Brandon 
Windows 7 operating system
A business has a kiosk computer located in the lobby for customers to use. The kiosk computer has recently been updated to Windows 7 from Windows XP and is not part of a domain. The local computer policy created for Windows XP has been applied to Windows
asked by RAM 
Chemistry
1.69 L of an aqueous solution containing 25.00 g of KCl dissolved in pure water is prepared. What is the molarity of the solution?
asked by Lori 
Math
The surface area of a cube is 384 square inches. What is the volume of the cube???? A. 8 cubic inces B. 16 cubic inches C. 256 cubic inches D. 512 cubic inches
asked by Sky 
physics
What will be the equilibrium temperature when a 245g block of copper at 285 degrees C is placed in a 145g calorimeter aluminum cup containing 825g of water at 12 C ?
asked by Mark 
chemistry
How many moles of chloroethylene contain 5.47×10^26 molecules?
asked by jj 
physics
A glass window pane is exactly 23 cm by 38 cm at 10oC. By how much has its area increased when it temperature is 49oC, assuming that it can expand freely? Take the coefficient of thermal expansion for the glass to be exactly 9 x 106/Co
asked by tony 
Math
Tell whether the quantity is constant or variable. 1. The price per gallon of gasoline. 2. The distance between Chicago and Boston. I need explanation for each also.... Thank you!
asked by Valerie 
Algebra 2
A farmer wants to enclose 2 adjacent rectangular regions next to a river. No fencing will be used next to the river. 60 meters of fencing will be used. What is the area of the largest region that can be enclosed. I need all of the steps to get to the
asked by Brandon 
Chemistry
The freezing point of mercury is 38.8°C, is the only metal that is liquid at room temperature. What quantity of heat energy, in joules, must be released by mercury if 2.00 mL of mercury is cooled from 23.0°C to 38.8°C and then frozen to a solid? (The
asked by Lindy 
Math
paint color is made using 4 drops of red and 5 drops of blue for each 5 gallons of paint. How many gallons of paint are being colored when 45 drops of color are used??
asked by Sky 
Math
Meg's pension plan is an annuity with a guaranteed return of 9% interest per year (compounded semiannually). She would like to retire with a pension of $70000 per semiannum for 25 years. If she works 45 years before retiring, how much money must she and
asked by Mani 
calculus
How many critical points does the function: (x+2)^5 * (x3)^4 have? How would I solve this quickly? The answer says something about an effect of multiplicity of the zeros of the function?
asked by Mira 
calculus
verify the following identity cos(x+y) + cos(xy)=2cosxcosy
asked by Carol 
Algebra
A lot is in the shape of a right triangle. The shorter leg measures 90 meters. The hypotenuse is 30 meters longer than the length of the longer leg. How long is the longer leg?
asked by Jennifer 
english
Neither her associates nor the doctor __________ the surgery is necessary. thinks think
asked by Ashley 
Prealgebra:Check
1. How many ways can the letters in the word LINEAR be arranged? a. 360 b. 720 c. 120 d. 240 is the answer a?
asked by Cheryl 
Discrete Math
I was hoping if you could help me to solve this problem. Thank you. A department wants to schedule final exams so that no student has more than one exam on any given day. There are 7 vertices of degrees 3,3,4,4,4,5,6 which show the courses that are being
asked by yengiang 
statistics
If the ages of colleges students are normally distributed with a mean of 27 years and a standard deviation of 3.4, what is the probability that a sample of 34 students would have an average age of at least 25.6 years
asked by Michael 
Algebra 2
One hundred feet of fencing is available to make a rectangular dog pen against an existing wall. What are the dimensions of the pen that will yield the maximum area? I need all of the steps to get to the answer.
asked by Brandon 
statistics
given the group of numbers: 8,9,10,10,10,11,11,11,12,13. which of the following are the same? a)range and mean,b)mode and median, c)standard deviation and mode d)mean and median, e)none
asked by BV 
chemistry
To what volume should you dilute 20 mL of a 13 M stock solution to obtain a 0.560 M solution?
asked by Kristen 
Chemistry
Delta H Vap (h20)=40.7Kj/mol How much water vaporized with 155Kj/mol?
asked by Joey 
Physics
A 30lb weight is attached to one end of a 6ft uniform beam whose own weight is 20lb. Where is the balance point of the system? I know the answer is "1.2 ft from the 30lb weight" but I can't figure out how to get there. Please help. Thanks...
asked by Stephanie 
statistics
What is the critical value for 0.04, left tailed test? I don't know what to put as the %?! I also don't understand what to look up in the E table for the value of Z?! Thanks
asked by Jennifer 
Math
What is the probability that x^2+7x+k will factor if k is greater or equal to zero and less than or equal to 20, considering k is an integer. How do I do this?
asked by Thanh 
calculus
INTEGRATE tan4x with respect to x
asked by Anonymous 
physics
How much heat in KJ is needed to change 3.0 kg of ice at 10C into (superheated) steam at +150C ? Do I need to find specific heat? (3.0kg)(2100)(15010)= 882kj right?
asked by DMITRIC 
Science
i need help with this experimental design.the topic is...what happens to your image that is initially observed in a flat mirror from 10 feet away and then you move further away to 20 feet? But i need to know how do I make up procedures (stepsin outline
asked by Jessica 
Weab base strong acid titration
NH4OH + H20 =
asked by Techno 
Com 155
I would appreciate if someone could look at the assignment I have to complete. I have included the rules I am to follow and the paragraph that I have written • Read two of the five paragraphs on the second page of this appendix. Write a brief paragraph
asked by Debbie 
Biology
I believe that I have answered the following questions correctly, but would like some reassurance. organisms that are used to decontaminate soils may a. store contaminates in their tissues b. release pollutants into the air c. degrade the pollutants d. be
asked by Paige 
English
Biography of Jack London What were Jack London's ideas of the American Dream? How was his life could be a metaphor for The Call of the Wild? What were the historical events that occur that could impact his writing?
asked by Misty 
MATH
Whose version of the number zero most closely resembles the number zero used in the US?
asked by mike... 
math
how can four turns land a figure on itself
asked by aruna 
physics
With what tension must a rope with length 2.70 and mass 0.150 be stretched for transverse waves of frequency 43.0 to have a wavelength of 0.850 ?
asked by Anonymous 
Algebra
The town of appleville recorded the following dates and populations. YEAR POPULATION 1985 51.5 1985 53 1990 56 1995 62 Estimate the approximate population of Appleville in 1988 by finding an equation and then substituting. HELP!!!
asked by Valerie 
Algebra
The town of Appleville recorded the following dates and populations. YEAR POPULATION (in thousands) 1980 51.5 1985 53 1990 56 1995 62 Estimate the approximate population of Appleville in 1988 by finding an equation and then substituting.
asked by TJ 
physics  rotational motion
A small car of mass, m, is release at height, h, on a steel track. the car rolls down the track and through the loop of radius, R. at the end of the rack, the car rolls off the track, which is positioned at height, H, above the floor. neglect friction and
asked by Lauren 
English
To Build a Fire by Jack London At what point does the man finally change his attitude? How does the man view the dog? How does the dog view the man? Note: I have read the whole short story.
asked by Misty 
Chemistry
In the laboratory exercise "Preperation and Properties of Polymers", polyvinyl alcohol is dissolved in water and then reacted with borax (Na2B4O7·10H2O) in water. Which of the following are expected results of this reaction? True or False? 1. Polyvinyl
asked by Chem 
physics
The temperature of 4.60 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in
asked by niki 
Science
full composition that explains the composition of the earth’s layers
asked by Anonymous 
Algebra 2
A rain gutter is made by bending up the edges of a piece of metal of width 36 in. If the length of the piece of metal is 24 in., find the height that maximizes the volume. I need all of the steps to get to the answer.
asked by Brandon 
chemistry
quarters are 91.67% mass/mass copper and 8.33% mass/mass nickel. if the average quarter weighs 5.67 grams, how many atoms of nickel are in a quarter?
asked by paula 
Social Studies
Can you please explain this(Simple): ( I know what this means, I just don't know how to word it out) "I took right of the cause. I could do but little...I did with a joyful heart, and never felt happier than when in an antislavery meeting...But, while
asked by Anonymous 
HCS/490
What effects will changing population demographics have on health care costs and services? Please discuss three (3).
asked by Bobbi 
Math
How many ml are there in .032L ?
asked by Phil 
business
CheckPoint: Calculating Fixed Costs, Variable Costs, and BreakEven Point for a Program • Calculate the fixed cost, variable costs, and breakeven point for the program suggested in Appendix D. • Base your calculations on the financial data for 2002.
asked by ash 
math
Express all the solutions to the following equations in a + bi form: (a) z^2 +2z+4 = 0 (b) z^3 −8 = 0 [Hint: z^3 −8 = (z−2)(z^2 +2z+4)] (c) 2z+iz = 3−i thank you!
asked by jane 
Algebra 2
You want to make a rectangular box that is x cm high, (x+5) cm. long and (10x) cm. wide. What is the greatest volume possible? What will the dimensions of the box be? I need all of the steps to get to the answer.
asked by Brandon 
Math
Write the answer to the problem as an algebraic expression. (Tell how you got your answer.) 1. Today the Center City baseball team scored 5 runs. The day before yesterday they scored W runs. How many runs did they score in these two days? 2. A theater
asked by Valerie 
English
I have a few more doubts on the same topic. I really hope you can havea look at these sentences, too. 1)There were (was ?) also a kitchen with a fridge, a shining bathroom and a very large balcony. 2) We spent our time above all (?) eating a lot of special
asked by Mike1 
Math
Use patterns or a linear equation to complete the table. 11) x y 1 1 3 3 5 7 10 ? 50 ? 100 ? I don't understand what I'm suppose to do! Please hep and explan well! Thank you!
asked by Valerie 
Windows 7 operating system
A mediumsized survey company stores sensitive government data that is used as part of a study. A security requirement from the government requires that all sensitive data must remain stored at the company’s head office. All staff and the head office
asked by RAM 
Law
•Provide a chart showing some of the basic costs of crime, including indirect costs (such as emotional costs) and economic costs. •Discuss the concept of indirect costs of crime. •List at least three indirect costs of crime. These costs can be costs
asked by Debra 
Biochem
calculate the volumes of 0.10 M acetic acid and 0.20 M sodium acetate that are needed to prepare 48mL buffer solution with pH = 3.70. Ka for acetic acid is 1.75 x 105
asked by Iris 
chem
a mean = 0.5, and the standard deviation is 1.84*10^3 ( gassian statistic apply). How many replicated if the standard error of the mean is not excess 0.001%. Please help, thank you so much
asked by lyn 
Calc 3
How do I integrate rcos2theta dr? and then I have to plug in the limits 1 and 2sin2theta for theta and plug what I get from that into a second integral. Help!
asked by Samantha 
chemistry
The Kb for butylamine is 5.9x10^4. What is the Ka for its corresponding conjugate acid, butylammonium? I really need help with this. I have no idea what to do. All I know is the equation to fine "Ka."
asked by Adam 
chemistry
quarters are 91.67% mass/mass copper and 8.33% mass/mass nickel. if the average quarter weighs 5.67 grams, how many atoms of nickel are in a quarter?
asked by paula 
Statistical reasoning in psychology
Mouradian (2001)surveyed college students...
asked by Kimberly 
English
I forgot to include the following sentences. Thank you very much 1) My family and I drove from Turin to Pisa. We didn't have an exciting road trip, because we mainly dorve through boring highways. 2) We spent our time having conversations about scool and
asked by Mike1 
MATH
A polygon has 20 diagonals .how many sites it have? ans 8 BUT HOW DO WE GET IT
asked by michele 
Biology for Kate
I want back and posted something today...about 3 posts back. Let me collect some of the Biology tests online for you. When I get them, I'll post them after this post. Sra
asked by SraJMcGin 
MATH
What is the ways that we use negative numbers in the United States?
asked by mike... 
Algebra
Identify the slope and the yintercept for y=4x+5. Thank you!
asked by Janey 
Math
The area of trapezoid is h( b1+b2)/5, where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the lenghth, in inches, of its
asked by Nena 
American history
Examination Number 007686RR IMPERIALISM AND THE PROGRESSIVE ERA
asked by Anonymous 
ENGLISH
Different ways to say "As you can see..." and "In Conclusion..."
asked by Anonymous 
statistics
In a city, 20% of the workers have incomes over $40,000 per year. A researcher chooses 1600 workers at random (with replacement) and finds that the mean is 320 and standard deviation is 16. what is the chance that between 320 and 336 of those have incomes
asked by BV 
algebra
If an obtuse angle measures 130 degrees, what is its reflexive?
asked by jean 
algebra
R=12000(0.07)/(1+0.07)^71
asked by Anonymous 
lab science 9th grade
what is an easy way to remember the equations used for: kinetic energy, potential energy, work, and power?
asked by caylanne 
math
planet A has an average surface temperature of 100F. Planet B has an average surface temperature that is 3/2 times of that Planet A. What is the average surface temperature of Planet A?
asked by carmen 
Compliments
Could you give me links to sites, that have compliments. I don't always want to say to people, wow, you've done such a nice job! I want to say something more sophisticated, please give me links to sites. Thanks.
asked by Anonymous 
Math
Solve for y using the multiplication principley/5= 6
asked by Ria 
Finance
Present value, How do I calculate the present value of: 7,000.00 in 5 years at a quarterly discount rate of 6%? I have read over the material, but I don't get it. Thank you
asked by Nancy 
Social Studies/English
Can you please different word the thing below:(did is the last one) "I was initiated into this underground business in the county of Ross, in the State of Ohio, in 1843, and continued in the office...until 1855...I experienced many very unpleasant
asked by Anonymous 
Algebra
translate to algebric express the product of 11 and the difference between d and 6.
asked by Anonymous 
Finance
A = P+PRT for R R=
asked by Anonymous 
Chemistry
Difference between ionic radius and atomic radius
asked by Andy 
home economics
each individual has a budget line in which they follow for expenditures. if the income of the individual increases what is the effect on the budget line?
asked by amy 
U.S. History
why were American crops such as heat and corn susceptible to insect pests?
asked by Ace 
Algebra 2
A rectangular box is to be x in. by (12x) in by (15x) in. What is the greatest volume possible? What will the dimensions of the box be? I need all of the steps to get to the answer.
asked by Brandon 
Social Studies
Can you please explain this(Simple): "I took right of the cause. I could do but little...I did with a joyful heart, and never felt happier than when in an antislavery meeting...But, while attending an antislavery convection at Nantucket, on 11th of
asked by Anonymous 
Socialsno sites!
What was the orignal idea of boundaries and the problems that have occured because of this? The provincials and territorial boundaries of western canada are so familiar that it is easy to forget how abstract they are. Beofre, Eurpoean settlement, native
asked by Anonymous 
physics
when the pressure is more on the ground  when a man is walking or when a man is standing.
asked by gaurav 
physics
In LCR series AC circuit when does the effective voltage lag behind the current?
asked by mm 
Calculus
find the derivative: d/dx int_a to x (a being the upper limit) of tan(tan(t))dt
asked by Elena 
Euro history
What is the immediate cause of WWII? Is it Germany's invasion of Poland? I can't remember.
asked by W 
Med Term
write a fictitious medical report of about two paragraphs describing a dermatologic condition or disease. Focus the report on the onset, progression, location, and etiology of the condition or disease, and the treatment parameters. All terms must be
asked by Tiya 
Physics
Some cooking pan whose bottom is made out of copper has a radius 0.1 m and thickness 0.003 m. The water in the pan boils at 1.7e3 kg/s. How much higher is temperature of the outside surface of the pan's bottom compared to the inside surface?
asked by Daniel 
Algebra
For the first phase of the project, imagine you want to cover the backyard with decorative rock and plant some trees. You need 25 tons of rock to cover the area. If each ton costs $62 and each tree is $76, what is the maximum number of trees you can buy
asked by Imagine 
world history
what combination of food did the polyneatians introduce to the island that they colonized
asked by jeremy 
English
Can you help me check these sentences, please? I included the doubts in brackets. 1) Last year we had a vacation in the mountains. 2) I spent the time of the journey listening to music. (or During the journey/trip I spent time listening to music) 3) We had
asked by Mike1 
english
i need a essay of 900 to 1 200 words persuade your employer that you deserve a raise
asked by ishmael 
U.S. History
How did farmers use of DDT affect other parts of the enviorment?
asked by Ace 
Cultural Diversity
Ms. Sue You have way too much time on your hands. Your posts add NO contribution to help students.
asked by SocialDeb 
SOCIALS
What was the mandate of the HBC? The western Area?
asked by Anonymous 
Finance
How do I calculate a present value? 7,000 in 5 years at a quarterly discount rate of 6% I have looked at the material, but I am confused. Thank you
asked by Nancy 
Algebra
Simplify 11(2a+3b4c)9(5a5b+3c)
asked by Anonymous 
drawing
Does anyone know for the work titled Blind MAn by William H. Johnson know what materials he used would it by tempura and printing paper? Also Does the artist use symmetrical or asymmetrical balance?
asked by Jennifer 
pyschology
I need an idea to get started please help me Thanks 1.First, choose two personality disorders: I'll choose Paranoid or you can choose one for me please •Schizoid •Paranoid •Antisocial •Borderline •Histrionic •Narcissistic •Avoidant
asked by Alex 
algebra
6x5y=15 what is the slope? what is the yintercept?
asked by Anonymous 
Teacher aide
I'm stuck on this question. Could someone help me please. Which of the following would you find in the new English and language arts curriculum guidelines? A An oral language program only at the primary grades B A phonics program at all grades C A writing
asked by Bree 
algebra
12x+10/5 =  x/20 I can't decide if I should cross multiply by 20 or just 20. The  is in the middle of the x and 20 (like a fraction) I came up with 2 possible answers: x=40/49 and x = 40/47
asked by mary 
algebra
12x+10/5 =  x/20 I can't decide if I should cross multiply by 20 or just 20. The  is in the middle of the x and 20 (like a fraction) I came up with 2 possible answers: x=40/49 and x = 40/47
asked by mary 
Math
Could someone answer this question so I understand it. Thanks For the function f(x)=6x^22 Find the average value of f(x) on the interval [0,4].
asked by Anonymous 
Math
What is the answer to this question? 48÷2(9+3)= ( If I do it with PEMDAS, the answer would be 2, but when I type in google, it give me 288) [ 9+3 = 12 > 48/2(12) > 2 x 12 = 24 > 48/24 = 2]
asked by Shadow 
U.S. History
How did the belief that humans should use the natural world for thier own ends change during 1960s?
asked by Ace 
physiology
what are the parts of the cerebrum the receive and interpret somatic senory signals? I have searched my ext just cant find the answer.
asked by lulu78 
careers
what is the difference between legal discrmination and institutionalized discrimination?
asked by ted 
science
Why is homework so important
asked by mary 
com101
where to find good sources on why renting is a better option than buying
asked by tony 
math
whats the demension of the parallogram if the areai 54 km2 and the height is 8 km
asked by mcintosh 
Math
If a and b are any real numbers such that 0
asked by Nena 
math
Trying to solve the number 91 how 1,3,4,6 can be used once using add,sub,mult,divide and symbols
asked by Tanya 
science
Can someone please give me a good website (other than wikipedia)on the four natural selection. Thank you
asked by samantha 
English
Here are some more sentences for you to check. Thank you. 1)The trip showed me that there is a big world outside.I decided to take (??) the trip to keep my family good company and to know them better. 2)The journey on car (by car) was very boring. 3)The
asked by Mike1 
mathematics
8x/4=64x
asked by michael 
geometry
how do you find the area of an equilateral triangle with the perimeter of 30ft.
asked by alexis 
statistics
which is more extreme: the 76.2in height of a man or 237.1lb weight of a man?
asked by BV 
math
Consider the cubic graph y = 3x^2 − x^3. (a) Write 3x^2 − x^3 in factored form. (b) Use this form to explain why the graph lies below the xaxis only when x > 3, and why the origin is therefore an extreme point on the graph. I mostly need help with
asked by jane 
Math
what is 2/5 divided by 15/7?
asked by Adriana Grant <3 
mathematics
2a/3=8+4a
asked by michael