Questions Asked on
January 13, 2008

physics
you slide a 325N trunk up a 20 degree inclined plane w/ constant velocity by exerting a force of 211 N parallel to the inclined plane a) what is the comp. of the trunk's weight parallel to the plane? b) what is the sum of the Fa, friction and the parallel
asked by physics time.. 
Physics
ball 1 with an initial speed of 10 m/s collides elastically with stationary balls 2 and 3 that are initially in contact with each other. the centers of balls 2 and 3 are on a line perpendicular to the initial velocity of ball 1. the three balls are
asked by Sarah 
General Chemistry
The photogenic work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10^19 J. What is the minimum frequency of light for the photoelectric effect in
asked by Kat 
Physics
A flea pulls on a puck with force 7 microN at an angle of 30°. Another flea pulls on the puck with force 2 microN at an angle of 60°. a) What is the magnitude of the net force on the puck? (I got 7.28 uN) b)At what angle is the net force? ( I got about
asked by Lindsay 
Religion
What countries of origin Hinduism, Buddhism, Confucianism and Daoism? What are historical figures and events Hinduism, Buddhism, Confucianism and Daoism? What are the central beliefs of Hinduism, Buddhism, Confucianism and Daoism? The nature of god of
asked by Danny 
Physics
Two negativelycharged bodies with 5.4e5 C are 0.20 m from each other. What force acts on each particle? F=kqq/d^2 F=(9.0e9)(q)(q)/(.20^2) Would both q's equal 5.4e5 C?
asked by Lucy 
chemistry
i have to write chemical formulas and balance them: nitrogen and oxyen> nitrogen monoxide N2+02>2NO nitrogen monoxide and oxygen> nitrogen dioxide gas. NO2+O>NO2 (i'm not sure about this, please check) nitrogen dioxide and water> nitrous
asked by Anonymous 
Physics
A car traveling at a constant speed of 125 km/hr passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets in a chase after the car with a constant acceleration of 2.7 m/s^2. How far does the
asked by Lindsay 
math algebra
A train averaged 80 km/h for the first half of its trip. How fast must it travel for the second half of the trip in order to average 96 km/h for the whole trip? The answer is 120 km/ h but how do i set it up and get there? thanks for you help
asked by grace 
(another homework)classroom management
what is the difference between classroom management and classroom discipline?...
asked by klar maesen 
Physics
A positive charge of 3.0e6 C is pulled on by two negative charges. One, 1.9e6 C, is 0.045 m to the north and the other, 3.7e6 C, is 0.030 m to the south. What total force is exerted on the positive charge? F=kqq/d^2 You would have to find the F
asked by Sarah 
Chemistry
Can someone check my answers for me thank you. I have the equation balanced below. 2H2O + K2SO4 > H2SO4 + 2KOH Ionic equation for the reaction between sulfuric acid and potassium hydroxide. 2H+ + SO4^2 + 2K+ + 2OH > 2K+ + SO4^2 + 2H2O Net equation
asked by Susie 
Math accounting
The following selected transactions were completed by Pilgrim Delivery Service during July: 1. Received cash from issuing capital stock, $115,000 2. received cash for providing delivery service, $58,000 3. Paid advertising expense, $2,000 4. Paid creditors
asked by MiMi 
Chemistry
Could someone please check my Chemistry homework? The molecular formula for cisplatin, a chemotherapy agent, is PtCl2(NH3)2 (The numbers are all supposed to be subscripts) 1. What is the molar mass of cisplatin? Ans: 300.06 g/mol 2. How many moles of
asked by Nathalie 
Physics
The hydrogen atom contains a proton, mass 1.67 1027 kg, and an electron, mass 9.11 1031 kg. The average distance between them is 5.3 1011 m. The charge of the proton is the same size, opposite sign of the electron. a)What is the magnitude of the average
asked by Susan 
finance
There is a preferred stock that pays a dividend of $5.00 at the end of each year. The stock sells for $60.00 a share. What is the oreferred stocks require rate of return?
asked by wynonna 
Chemistry
How many kilograms of aluminum can be extracted from 2.0 metric tons of the ore 'alumina' (Al2O3)?
asked by Nathalie 
Chem.
Three emission lines involving three energy levels in an atom occur at wavelengths x, 1.5x, and 3.0x nanometers. Which wavelength corresponds to the transition from the highest to the lowest of the three energy levels? Please help me, thank you very much
asked by Jady 
Chemistry
Please help me break this problem down.. Thanks lot. Light with a wavelength of 425 nm fell on a potassium surface, and electrons were ejected at a speed of 4.88 X 10^5 m/s. What energy was expended in removing an electron from the metal? Express the
asked by Olivia 
comparative essay
okay this is my intro Egar Allen Poe is well known for his Gothic Novels.There are many different enterpretations of "the Raven" that have been presented over the years.Edgar Allen Poe and The simpsons rendition of "the raven" are similar in some ways and
asked by chanel 
Algebra 2
I have taken algebra 2 for three years in a row. I take notes daily, I pay attention in class, I have a tutor, and yet I am in the same position again. I currently have a 56.7% in my algebra 2 class. I have one test and the final exam before final grades
asked by Zachery 
SCI
Energy Resource Challenges Post a 200 to 300word response to the following: Describe all of the renewable energy alternatives (WIND POWER, SOLAR POWER, BIOMASS FERMENTATION) What are some challenges with using and managing these
asked by Kimberly 
math
What is the defintion of supplementary angles and complimentary angles and what is the difference?
asked by jessie 
physics
An astronaut weighs 696 N on the Earth. What is her weight on planet X, which has a radius Rx = Rearth 1.60 and a mass Mx = Mearth 8.60? the only equation I know for weight is "w = m x g"...I don't know how to solve for w using force.
asked by Courtney 
geometry
the surface area of a sphere if the radius, r, is 6 meters.
asked by lili 
homework help site w/ all subjects?
does any one know of any other homework help site where people can draw stuff and explain things, the site covers all subjects, but i forget wat the site is, and i dotnt want a paying site like stupid tutor vista..
asked by any other hmwrk help site? 
Physics
a 5 kg block with a speed of 3 m/s collides with a 10 kg block that has a speed of 2 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.5 m/s. a) what is the speed of the
asked by Sarah 
Algebra
sovle the compound inequality 8
asked by Kelsi 
Data Management
Sorry...i wrote the previous questions wrong.. The producer of HB pencils has 720 pencils randomly chosen from each day's productions. A defect rate of 15% is acceptable. a) Assuming that 15% of all manufactured pencils are defective, what is the
asked by Jamey 
History
Which was not a cause of agitation by the Parisiaan lower classes in the 18th century. a.taxation b.farming methods c.Overpopulatin d.free trade e.feudal rents i think it is D. Free trade
asked by Evan 
Science
What is an example of mutualism found in caves?
asked by Ryan 
French
En 1939, des militaires globaux étaient en conflit et la Deuxième Guerre Mondiale commence. Elle a divisé plusieurs nations du monde en deux alliances militaires : les Alliés et les puissances d'Axe. La Deuxième Guerre Mondiale a été connue comme le
asked by Dana 
Writing
How can I end this? ____ The bridge I made a model of is the Sydney Harbor Bridge. The bridge is located at Sydney, Australia. The Sydney Harbor Bridge is the main way to cross the Sydney Harbor carrying rail, vehicular, and pedestrian traffic between
asked by Bob 
geometry
Find the surface area to volume ratio for a rectangular prism with edge lengths 7, 5 and 11
asked by anonymous 
English
What is wrong with this sentence. Grammar wise... If he cannot attend the game, an elemental fan, according to an article in SPORTS ILLUSTRATED entitled "Buck Wild For The Bucks", will watch the game on TV with family or friends.
asked by Katie 
how come
it takes forever to get a reply from a teacher? i asked a question about science 12 hours ago, yet no one has helped me. do you have any suggestions of where else i could go for help?
asked by hok 
slope
In a rectangle ABCD, the slope of line AB is 1 and the slope of line BC is 1/2. What is the slope of the altitude to line AD the altitude to line CD. Thanks in advance.
asked by jen 
financial management
suppose you purchase a home for $150,000.and obtain a 90% mortgage loan, 30 yr. maturity, at a fixed annual interest rate of 80% with deferred monthly payments. What is the monthly payment for principal and interest on this loan?
asked by cj 
Accounting
Year end inventory at cost $55,902, at retail 84,700. Questions: A yearend physical inventory at retail prices yields a total inventory of $78,550. Prepare a calculation showing the company's loss from shrinkage at cost and at retail.
asked by Jill 
public administration
PLEASE HELP. I am stuck on this question. Which of the following is not one of the outside forces impacting an agency head? A. Legislators B. The courts C. Demands of unionized workers in the agency D. Special Interest groups
asked by Keith 
public administration
LAST QUESTION I PROMISE> I AM STUCK PLEASE HELP In the area of public administration, which of the following is considered to be a reformer? A. Franklin D Roosevelt B. Dwight D Eisenhower C. Gerald R Ford D. Calvin Coolidge
asked by Keith 
physics
starting from rest, a ball rolss, down an incline ata constant acceleration of 2meters per second what is the velocity of the ball after 8.5 seconds? how far does the ball roll in 10 seconds? any one can help pleasse im stuck
asked by ashley 
physics rewrite
starting from rest, a ball rolls, down an incline at a constant acceleration of 2meters per second squared what is the velocity of the ball after 8.5 seconds? how far does the ball roll in 10 seconds? any one can help pleasse im stuck show n detail how to
asked by ashley 
Religion
Historical figures and events:Hinduism Confucianism Buddhism And Daoism
asked by Danny 
Science
Farmer Jackson plowed a field at the top of a hill and then had a crop dusting plane spray weed killer on the field. After a few days, he noticed that there were still a lot of weeds in the field. He noticed that weeds in a field that was located right
asked by Latonie 
Algebra
I reduced a diagram on my computer using a scale factor of 8o%(i.e. the linear dimensions of the diagram were reduced so they became 80% of the original dimensions). What scale factor is required to return the diagram to original size?
asked by Bobby 
Geometry
If I know the number of sides of a regular polynomial(10), how do I find the exterior and interior angles?
asked by Erick 
AP Biology
We just did the Osmosis and Diffusion lab in Biology. My teacher wants us to use water potential (and its equation) to explain the results....how do I use the water potential equation?
asked by Marie 
Algebra II
Add, multiply, divide, or subtract as indicated. 1. (x + 7) (x2 – 3x + 2) 2. (x + 7) – (x2 – 3x + 2) 3.(x + 7) + (x + 7)
asked by Sarah 
Math
5y5y=0
asked by GEO 
Physics
"The exact relationship for the period T of a simple pendulum is T=2*pi*sqrt_of(l/g) where l is the length of the pendulum, and g is the acceleration of gravity." I have to rearrange the formula to where you solve for l instead of t. I started to try to do
asked by Emily 
physics
what is the vert. comp. of vector with magnitude 88.5m/s and whose horiz. comp. is 75.4m/s? what is the direct. of this vector?
asked by Anonymous 
physics
a force accelerates a car of mass 1240 kg at 2 km/hr. what is the force? i need help how do you get the acceleration? i know f=ma but what's the a? or is this the wrong equation?
asked by Cierra 
Algebra 2
Solve: 0 = x3 + 5x2 + 2x – 8 Solve: 0 = x3 – x2 – 11x – 10
asked by Christian 
Math
Tori needs 9 15/16 yards of fabric for one project. She needs 1 7/8 yards of fabric for another project. How much fabric is needed for both projects?
asked by Patricia 
geometry
The oblique prism has a height of 6 inches, a width of 2 inches and a length of 7 inches. Find the volume
asked by anonymous 
Algebra
f(x) = 8x4 – 3x + 2 1. Given the function above, what is the right end behavior? 2. Given the function above, what is the left end behavior? 3. Given the function above, what is the maximum number of turns?
asked by Zachery 
Math
solve: 4x+18=22 please help. i just need to understand how to do this for i have many problems like this on my final, and i have forgotten how!
asked by EAW 
physics
A projectile hits a target placed on a level field. It has arange of 37.0 m. The nagle of launch is 33.4 degrees above the horizontal. What was the initial speed?
asked by Anne 
Maths/Law of sines
I have a spherical triangle and I know 1 angle 31.3 degrees and all 3 sides which are 1624, 2118.4 and 1078.85 nautical miles. In order to find the other 2 angles I know I must use the law of sines: sin A over a = sin B over b = sin C over c If angle A is
asked by Mike 
Chemistry
I was supposed to figure out whether the following equations produced precipitates or not. Here are my answers, but I know that they are wrong. So I still can't figure out where I'm messing up...? Please help! HgCl2 (aq) + K2CrO4 (aq) = Yes Ba(OH)2 (aq) +
asked by Cierra 
Calculus
My book says to do the following problem via computer and via hand: Calculate the definite Integral of e^x * cos x dx over (0, +infinity) My TI89 calculator gets 1 (it gets the same thing when I replace infinity with 999). when I do this by hand, I get:
asked by mathstudent 
Calculus
Suppose that the region between the xaxis and the curve y=e^x for x>=0 has been revolved around the xaxis. Find the surface area of the solid. I got 3*pi The book shows an answer of pi * [sqrt(2) + ln(1 + sqrt(2))] Where do I go wrong? For the sides of
asked by mathstudent 
Algebra 2
indicate whether the function is quadratic. (5x4)(5x4) then 2(x+2)squared2xsquared
asked by Magie 
Geometry
How do I find the number of sides a regular polygon has if I only know te measure of the exterior angle, such as 40 degrees?
asked by Erick 
Math
Wha are the roots of x to the second power divided by x minus six equals Zero?
asked by Jacob 
Math HELP please
____ How do you simplify these? / \/ 24 Including numbers such as 40 60 and 48?
asked by Josh 
Algebra functions
How do I know how many possible zeroes of a function there are? I have a graph and i have to find how many zeroes there are.
asked by Justine 
Geomety
Find the distance between each pair of parallel lines y= 3/4x1 3x+4y=20 Please help
asked by Connie 
Latin
In Catullus' 3rd poem what does "Veneres Cupidinesque" refer to and what is the signifigance of "passer"? I've checked some sites but they don't give me clear explanations to these 2 things.
asked by Anonymous 
Segregation
If segregation was really bad ,why did it start in the first place?
asked by Brooke 
history
whatdid the people of ancient ghana have that the proto bantu speaking people have did not have
asked by sahlah 
Public administration
PLEASE HELP Public organizations borrow money from the private sector to avoid conflict with A. Taxpayers B. Policymakers C. Banks and lenders D. None of the above
asked by Keith 
public administration
The capture hypothesis states that public organizations A. Steal employees from the private sector B. Battle for more than their fair share of tax monies C. Become influenced by special constituencies D. will, when given the opportunity, bleed resources
asked by Keith 
Comparative essay
okayyy well im still working on that comparative essay on the simpson version of "the Raven" by A.E poe and the origional poem... and well im comparing moods between the both and well i don't know what to talk about... like what's diferent between the two
asked by chanel 
math
okay i need to find a complamentry angle whos difference is 12 degrees
asked by Rachel 
math
okay i need to find a complamentry angle whos difference is 12 degrees
asked by Rachel 
Algebra
What are the formulas sum of perfect cubes and difference of perfect cubes? bobpursley said to use them in one of my other posts but I don't know those formulas.
asked by Ashlynn 
Data Management
The producer of HB pencils has 720 pencils randomly chosen from each day's productions. A defect rate of 15% is acceptable. a) Assuming that 15% of all manufactured pencils are defective, what is the probability of finding at least 80 percent defective
asked by Jamey 
history
the 1801 concordat between Napolean and the pope resulted in all of the following except a. Napoleon beecame head of the French chirch woth the right to appoint and dismis bishops b. the vatican accepted the confiscation of its lands by the revolutionary
asked by Evan 
math help please
2% of 55 and 14is 70% of what number
asked by Anonymous 
Psychology
We (3) have to lead half hour class discussion on introduction to Psych., ask 3 questions, make a case study. We don't know where to start. It's only introduction?? Help!! tx
asked by Karon 
Data Management
The producer of HB pencils has 720 pencils randomly chosen from each day's productions. A defect rate of 15% is acceptable. a) Assuming that 15% of all manufactured pencils are defective, what is the probability of finding at least 80 percent defective
asked by Jamey 
physics
i don't understand how to do this question, its a phys 11: "A skier is acc. down a 30.0 degree hill at 3.80m/s^2" a) What is the horiz. comp. of the acc.? b) What is the vert. comp. of the acc.? c) Assuming she starts from rest and acc. uniformly down
asked by Anonymous 
language
How can you tell a valid opinion from a bias opinion? I realize when they are obviously slanted, but what makes an opinion valid?
asked by Zoe 
Algebra
what are the 3 formulae for slope? Thank you so much! Raziel
asked by Raziel 
geometry
What is the surface area of this right cylinder? Dimensions are in meters. Use 3.14
asked by anonymous 
geometry
If a sphere has a diameter of 4 inches, what is the volume? Use 3.14 for
asked by anonymous 
math
There are 2 similar triangles. 1 has coordinates (2,3)(3,4)(2,7). The other has coordinate (7,6) and letter A for the right corner of the base and P for the top. A has coordinates 1)(9,8) 2)(10,9) 3)(7.5,6.5) For each case find the scale factor for
asked by Anonymous 
Chemistry
"Under constant conditions of P(pressure) and T(temperature) (and R [gas constant]), write an equation showing d(density) written as a function of M(molecular mass)." I don't understand this, really! Please help! Thanks in advance!
asked by TAG 
Science
How limbless salamanders evolved according to Darwin's theory of natural selection.
asked by Crystal 
Physics
What is the total charge on all of the electrons in two liters, 2 kg, of water? One mole of water has a mass of 18 g and each molecule of water contains 10 electrons. Way I worked problem: (2kg)(1000g/1kg)(1mol/18g)(10e/1mol)(1.60e19/1e) What I did do
asked by Jane 
Algebra 2
1. Is the absolute value of 4x >14 a disjunction or a conjunction? 2. If you have a function what is domain?
asked by Christian 
Math
evaluate f(3) when f(x)=5x=9 please help me. i don't understand what the f stands for and what im supposto do... thanks!
asked by EAW 
Algebra
Factor completely: 1. 8x3 + 2x3 – 12x –3 2. 27x3+8 3.125 – 8x3
asked by Ashlynn 
english
I have a test over literary devices and we have to write which devices are used in a speech of some sort. But I need to find a way to practice it...any advice or websites?
asked by nicole 
Science
Stanley had been collecting shells and stones for several years. One day he was walking along shore of a lake and found a beautiful stone. When he turned the stone over, noticed that there was an imprint of an animal on the bottom. His mother said it might
asked by Latonie 
Math
Please help with this question. Determine an algebraic model for Alvins data and use it to make a reasonable prediction for the population in 2036. I am having trouble with the algebraic model. thanks
asked by Nikki 
Science
How are valence electrons involved in the formation of a covalent bond? They gave me the answer as...They are shared with another atom (or atoms). However, i thought they shared electrons not atoms...it confused me
asked by Shannon 
Science
What happens if you submit a sedimentary rock to intense heat and pressure?
asked by Melissa 
history
All of the following are truewith regard to the French philosophers except a. Their ideas sparked the french revolutin b. they promoted the rights of the lower classes, the min participants in the French Revolution c. They contributed to the new forms of
asked by Evan 
calculus  PLEASE HELP!
1. To five decimals it is a fact that log(2)=.30103 Compute the following to three decimal places usuing ONLY this fact and the logarithmic rules and the definition of a logarithm. a. log100 (2) base 100 b. log1000 (square root of 2)  base 1000 2.
asked by anonymous 
english
when writing the word GRADE ONE in a sentence...would it be Grade One (where there both capital) Grade one (where only grade is capital) or grade one (where none are capital)
asked by spellinggrammer 
Algebra
I posted this earlier in the day but no one answered. Can anyone help with these problems? Factor completely: 1. 8x3 + 2x3 – 12x –3 2. 27x3+8 3.125 – 8x3
asked by Ashlynn 
Percent error?
What is the formula for percenterror? It's either: %error= (your value/accepted value)*100 or %error= (accepted value/your value)*100 I'm pretty sure it's the first one, but I also heard it can go either way. I tried both ways but I end up with two
asked by Emily 
Social Studies
I need an idea for making a craft project that has to do with the Cherokee Indian Tribe. Thank you!
asked by Brad 
mass affects on energy
I need to come up with an experiment for observing how mass affects energy. Does anyone have any suggestions?
asked by Justin 
algebra
if f(x) = x^2  2x, find f(x+2)  f(2) / 2 the answer is: x+2 but l got: x^2  2x  8 = 0 which is x = 4 or x = 2
asked by dave 
linguistics
what is a firthian linguistics?...its full structure and history...
asked by klar maesen 
Science
How are valence electrons involved in the formation of a covalent bond?
asked by Shannon 
Physical Science
Hello, The following problem I worked out with this formula: V2=V1+gt. I came to the the answer 78.4 m/s. Can you tell me if that is correct. Thank You If a stone with an original velocity of 0 is falling from a ledge and takes 8 seconds to hit the ground,
asked by Mandi 
Math
2x=0
asked by MOO 
Math
Determine how far electricity travels in 16 mins. a. 1,785,600 mi b. 17,856,000 mi c. 178,560,000 mi d. 1,785,600,000 mi
asked by Patricia 
Math
solve: y(squared)144=0 please help, for like the other one, i have this on my final too. Thank You!
asked by EAW 
Science
How do you explain how air resistance works?
asked by Hannah 
MATH
a^1 + b^2 / a^2 + b^1 The answer is ab(b^2 + a) / b(b+a^2) How do I set that up and work the problem out? thanks for the help
asked by grace 
Is their a history tutor on Board right now?
I really need help with my homework. On the hand I do appriciate all the other help I have gotten the past other days I have been on the website.My grades have been boosted up all because of the help Ive gotten on here
asked by Brooke 
MATH
sorry. i messed up the last one. its evaluate f(3) when f(x)=12x5 sorry. but if you could help, it would mean the world to me. : ) Thansk!
asked by EAW 
science
What is Boyle's and char?les's Law
asked by Antonio 
Social Studies
What were Egyptain portrait masks made of?
asked by Jamie 
English
What are some ideas of writing a satire or parody of a stereotype in todays western world.
asked by Nikki 
history
One reason for middle class resentment of the French Aristocracy was that a. The aristocracy paid no taxes while the bourgeoisie paid heavely b. The middle class felt shut out of many government offices and honors I think it is A.
asked by Evan 
history
The napooleonic code a. banned labor unons b. increased individual rights and limited the state's powers ub crunubak cases I think it is b
asked by Evan 
Algebra
When are 2 lines parallel? It's where there are no solutions to the set of equations of the lines, right?
asked by Joey 
MATH HELP
14000 ACRES OF LAND 12% IS PATIO 25% LIVING SPACE AND REST IS LAWN SQUARE FOOTAGE FOR EACH PORTION OF LAND USING PERCENTAGES
asked by Anonymous 
Science
Science project: how does the type of liquid affect weathering. Where do I find info on this subject? I am not sure what questions to ask/answer to start this project
asked by Lee 
Latin
I need to create a modern interpretation on Horace's ode 1.9, but I don't know what to write about. If anyone could help me I would be grateful.
asked by Bailey 
Algebra functions
How do I find the solutions and factors of a function when given only the graph?
asked by Justine 
Social Studies
What was the substance used to stuff in the mummy's nostrils?
asked by jorge 
Math
5t = t+12
asked by Joe 
Math...
solve the porportion: 9/12=15/? please help.
asked by Erin(im so confused!) 
Math
5t = t+12
asked by Joe 
How would you solve the following inequality
How would you solve the following inequality algebraically? 0.5(x + 2)^2 (x  4) > 2x + 3
asked by Anonymous 
Physiology
Please check answers, and correct if it is wrong! 1) How many bones are there in the adult spinal column? 26 bones 2) How many bones are there in the thoracic section?12 3) At what age are the curves fully developed?10 1) What rib/s are attached to the
asked by 565