Questions Asked on
April 6, 2011

physics
You have an inclined plane. It is 2m long and 1m high. A cylinder of mass 300 grams and 3cm radius is initially at rest at the top of the hill. What is its angular velocity when it reaches the bottom of the hill?
asked by Lakeshia 
MicroEconomic
Strictly speaking, perfect competition has never existed and probably never will. Then why study it?
asked by JT 
Calculus (urgent!!)
Please answer the following questions about the function f(x)=e^(0.5x^2) Instructions: If you are asked to find x or yvalues, enter either a number, a list of numbers separated by commas, or None if there aren't any solutions. Use interval notation if
asked by Catherine 
chemistry
In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?
asked by Tina 
chemistry
In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?
asked by Tina 
business communication
Today many employers expect interviewees to do more than just answer standard questions including all of the following except .defer to the hiring company to take control of the interview process B.provide samples of work they woukd likey do in the job.
asked by se 
home economics
Why do some workers make more money than others
asked by Anonymous 
science
A 250 kg object is acceelerating at 2.8 m/s2. What force was required to achieve this?
asked by Kelsey 
chemistry
In the reaction N2 + 3H2 > 2NH3, how many grams of NH3 gas would be formed when H2 gas, having a volume of 11.2 liters at STP, reacts with excess N2 gas? Completly confused, thank you very much for your help :)
asked by David 
Chemistry
A 2.52 mg sample of the compound didemnin â€“ C was analyzed and found to have the following compositions: 1.55 mg C, 0.204 mg H, 0.209 mg N, and 0.557 mg O. The mass spectrum of didemnin â€“ C was found to have a parent mass peak of 1014 g/mol
asked by Anonymous 
Chemistry
In a decomposition reaction 2KCLO3 > 2KCL + 3O2, what volume of O2 gas at STP would be produced from 3.66g of KCLO3 Thank You very much for your help :)
asked by David 
Chemistry
HELP!!! An unknown metal having a mass of 14.00g is dropped into 11.00mL of water at 20.0 degrees Celcius. The starting temperature of the chunk of metal is 100.0C. The final temperature of the water and metal is 32.5C. What is the specific heat of the
asked by Marie 
Information Technology Principles
If a term paper consisted 42 pages, each containing 40 lines of 100 symbols each (counting each space as a symbol), was to be encoded using Unicode, how many bytes of storage space would be required?
asked by saqer 
European History
Hi I just wanted to know if there is any evidence that Stalin used the fear/hatred of Kulaks to eradicate other political and social opponants... Thanks ps. If you could include any sources to support this it would REALLY help
asked by Hilary 
Maths
Find the particular solution of the differential equation from: dy/dx = 2/27(x3)ã(x^26x+23) / (y) (y>0. For which y=2 when x =1, and then give this particular solution in explicit form. regards Claire
asked by Claire 
Chemistry
Calculate the mass of H2O produced by the decomposition of 2.21g of CuCO3 x Cu (OH)2. What happend to this water? This question is incredibly important and I am stuck on it, thank you very much for your help
asked by Vanessa 
Math
Jane's garden is in the shape of a right triangle. One leg of the right triangle is longer than the other leg. The area of the garden is 63 square meters. What is the length of the longer leg?
asked by Lily 
chem
determine the wavelength of the line in the emission spectrum produced by an electron transition He+ from ni= 4 to nf= 2.
asked by james 
Math 8th Grade
Jane's garden is in the shape of a right triangle. One leg of the right triangle is longer than the other leg. The area of the garden is 63 square meters. What is the length of the longer leg?
asked by Lily 
Physics
A concave mirror has a focal length of 20 cm. What is the magnification of an object placed 128 cm in front of this mirror?
asked by Deli 
Physics 2
A converging lens with a focal length of 19 cm is used to form an image on a screen that is 3.3 m to the right the lens. Where must the object be placed? ____m to the left of the lens?
asked by Deli 
calculus
A rumor spreads through a population in such a way that "t" hours after the rumor starts, the percent of people involved in passing it on is given by P(t)=100[e^(t)e^(4t)]. What is the highest percent of people involved in spreading the rumor within the
asked by Anonymous 
Algebra investment
An investor had a total of 25,000 put into a portfolio of stocks, bonds, and mutual funds. In one year, he earned 8% on the stock investment, 10% on the bond investment and 6% on the mutual funds investment. The annual(simple interest) return was $1860. if
asked by Maka 
Statistics
How do you calculate pearson's r from this table? X Y 5 24 8 40 3 20 6 30 9 40 7 35 10 50 2 22 The correct answer for the linear regression table is Y' = 3.56X + 10.4. But every time i calculate r, i get a value over 1. Here is another one that i couldn't
asked by BlahxD 
calculus
If H(x)=(25x^2)^(1/2); then what is the value of lim x tends to 1 (H(x)H(I))/(x1) ?
asked by Rimi 
Chemistry
Calculate amount of solid NaF required to prepare a 250mL acidic buffer with pH=2.75. The initial molarity of HF is .25M but you only have .075L of it. I have tried many different ways... the most recent and seems to be simplest was using HH equaion and
asked by John 
Chemistry
Calculate the pH of the buffere prepared if 40.0 mL of .2M NaOH is added. The previous buffer is made from HF an NaF... assume all necessary information is known about this buffer. Print an equation that shows how the NaOH is consumed by the buffereing
asked by John 
English
Can you please tell me why "The hotel lies at a short distance from the beach" is wrong? Here are some more words I'd like you to check with reference to fashion. 1) wedgeheeled shoes, Paràrubber shoes, trousers with patches on both sides, jeans with
asked by Mike 
science Do you think DNA from another organism wo
Do you think DNA from another organism would have a different appearance? i m assuming yes.. is it??
asked by kim 
calculus
the net monthly profit in dollars, from the sale of a certain item is given by formula p(x)=10^6[1+(x1)e^0.001x], where x is a number of item sold
asked by Anonymous 
statistics
A confidence interval or significance test is called stable if the confidence level or Pvalue does not change very much when the conditions for use of the procedure are violated
asked by A confidence interval or significance test is call 
Organic Chemistry
The UV/Visible spectrum for C10H14O exhibits a at 244 nm C10H16 + hot KMnO4 + H2SO4 → C10H16O3 C10H16O3 + Zn(Hg)/conc HCl → C10H18O2 C10H18O2 + CH3CH2OH + H3O+ → C10H22O2
asked by chem 
Organic Chemistry
Suggest structures for C10H14O; C10H16; C10H18; C10H16O3; C10H16O2 ; C12H22O2 in the following reaction schema: The UV/Visible spectrum for C10H14O exhibits a at 244 nm C10H16 + hot KMnO4 + H2SO4 → C10H16O3 C10H16O3 + Zn(Hg)/conc HCl → C10H18O2
asked by chem 
geometry
Find the area of a pentagon ABCDE with verticles A(0,4),B(3,2),C(3,1), D(3,1) and E (3,2)
asked by PAT 
geometry
Find the area of a pentagon ABCDE with verticles A(0,4),B(3,2),C(3,1), D(3,1) and E (3,2)
asked by PAT 
music
which one of the following pieces of music would you most expect to be played by a full orchestra
asked by ellie 
fizik
A 2kg ball,A moves to the right with velocity 4 m/s collides with another 1kg ball,B moving in the opposite way with velocity 0.5m/s. after the collision, both ball move at 30 degree and 15 degree from horizontal. calculate the final velocity of each ball
asked by alya 
physics
A tennis ball of 60g is dropped from a height of 2.0m,It rebounds but loses 25% of its kintic energy as thermal energy.Ignoring air resistance,calculate
asked by Physics,help. 
physics
A tennis ball of 60g is dropped from a height of 2.0m,It rebounds but loses 25% of its kintic energy as thermal energy.Ignoring air resistance,calculate (1)the kinetic energy of the tennis ball when hits the ground. (2)the height reached on the ground
asked by Physics,help. 
English  Native speakers
Helo :) Can you tell me if the following explanation of mine concerning possessive s is correct? We put 's with every noun in singular (my mother's house)and when we have irregular plurals (this is my children's school) We put just the apostrophe when we
asked by Mark 
physical
Part A Each blade on a wind turbine is engineered to produce an effective force through its center of mass that is perpendicular to its long axis. (Part A figure) The magnitude of the force produced by each blade in a wind of speed v is F=(40.0~{\rm
asked by gary 
math
assume that the edge of a square is 1 unit add squares to this shape so that it has a perimeter of 18
asked by pat 
pscyhology
Which one of the following statements best illustrates implicit memory
asked by jabrenne carter 
math
t=sin(2*t^3) get the t
asked by kevin 
Physics 203
A 1.3kg 10cmdiameter solid sphere is rotating about its diameter at 77 rev/min. (a) What is its kinetic energy? (b) If an additional 5.0 mJ of energy are supplied to the rotational energy, what is the new angular speed of the ball? rev/min
asked by Kayla 
Environmental Science
write down the '' balance sheet''(carbon,electron,ATP,etc)for the fallowing metabolic process: use the most common alternatives. Give the balanced overall reactions with correct stoichiometry Ýndicate all key reactans and products. calculate how many
asked by Djef 
GCF Help?
w^215w+44=0 How would I solve this? I know you need to find the GCF of it, but I can't figure it out.. Could someone help me? Thanks
asked by Allyson 
geometry
A pentagon is a geometric figure with 5 sides. The lengths of the sides of a given pentagon are (6x + 2) cm, (3x + 2) cm, (2x) cm,(3x + 4) cm, and (8x – 4) cm. Which equation below describes the perimeter, P, of the pentagon in terms of x?
asked by Anonymous 
vocabulary
select the antonym of the word philanthropy. a)charity b)greedy c)benevolence d)generosity ........please help me .
asked by amy 
biology
what are examples of enzymatic disorders? How do the diseases involve enzymatic reactions?
asked by vivian 
math
1) A region is bounded by the line y = x and the parabola y = x2  6x + 10. What is the volume of the solid generated by revolving the region about the xaxis?
asked by arun 
math
2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.
asked by arun 
geometry
A wheel with a diameter of 18 m takes one full rotation.How much distance has it travelled?
asked by reahna 
math
Write the following expression as the sine, cosine, or tangent of an angle: cos45°cos120°  sin45°sin120°
asked by arun 
earth
If the ray is traveling 5800 miles per hour from earth how long would it take to hit the moon?
asked by Anonymous 
math
Two similar polygons have areas of 16 square inches and 64 square inches. The ratio of a pair of corresponding sides is 1/4. True False its true?
asked by danny 
physics
Quartz has a refractive index of 1.54. If light from a HeNe laser impinges on an air/quartz interface at an angle of 22.5 degrees, what is the angle of refraction?
asked by noel 
Algebra IIPlease check calc
How many ways can a teacher arrange 10 students in a front row if there are 60 students I think I do 60!/50! = 2.74 *10^17 How many ways can you choose committee of 7 from a total of 20 (20 nCr7) = 77520
asked by Katie L. 
Physics 203
A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 13.0 cm and mass 0.50 kg. (a) Find the speed of the 2 kg block after
asked by Kayla 
Finite Math
Consider the pea data: # peas in pod 2,3,4,5,6 and frequency 7, 9, 5, 3, 1: a. find the mean, median, mode and midrange number of peas per pod. b. is the mean higher or lower than the median? What kind of skew does this indicate?
asked by ophelia 
Finite Math
The weekly takehome pay (in dollars) for 20 graduate teaching assistants at University Z is as follows: 500.75, 217.43,488.25, 405.78 485.46, 495.48, 370.75, 435.40 479.65, 482.56, 470.28, 489.90 382.50, 500.75, 465.32, 481.25 506.43, 225.50, 504.38,
asked by caylin 
Excel
Want to create a worksheet that will help track your grades and. What formulas and/or functions might you use?
asked by Haley 
French
Qu’estce que la culture? Donnez deux exemples de la « culture française » qui illustrent votre définition de la culture. Utilisez au moins 3 phrases au subjonctif.
asked by TITI 
math
1) A region is bounded by the line y = x and the parabola y = x2  6x + 10. What is the volume of the solid generated by revolving the region about the xaxis?
asked by arun 
biology
Hi, I appreciate your expert help,and I have a question for you. If I'm asked to decribe resting potential, action poential, and synaptic transmission,in point form;would the following responses be right? Resting Potential: 1.Membrane at resting potential
asked by Cliff 
calculas
2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.
asked by arun 
Chemistry
Sulfur burns in oxygen in two steps: i.S(s) + O2(g) >SO2(g) change of Heat=297kJ ii. 2SO2(g) + O2(g)>2SO3(g) change of heat=198kJ Calculate the total heat released if this is the final reaction: 2S(s) + 3O2(g)>2SO3(g)
asked by Erika 
improving your writing
Please let me know what you think. It's for an exam. Thank you For the past three months, workrelated problems have occurred in the office and need to be addressed. Before Jessica Hilo’s medical leave, the workload was equally divided. There were no
asked by jacqui 
English
what is art online? ( online art galeries, virtual art, nowadays art or something different?)
asked by Peter 
Spanish 7th gradePlease check
Please check. How would I say "I feel like drawing. Would it be: Yo tengo ganas de dibujar.
asked by Sally 
role of and health care/nursing role
in health care what trends do you anticipate influencing curriculum content and structure in the next decade?
asked by Elaine 
sociology
You are a sociologist who uses the conflict perspective to study various aspects of our society. How do you think you would interpret the practice of prostitution? Contrast this view with the functionalist perspective. Do you think your comments would
asked by Sharon 
Physics 203
A wheel has a thin 2.7 kg rim and four spokes each of mass 1.3 kg. Find the kinetic energy of the wheel when it rolls at 6.0 m/s on a horizontal surface.
asked by Kayla 
Physics 203
A hollow, thinwalled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 5.0 m. The cylinder arrives at the bottom of the plane 2.7 s after the sphere. Determine the angle between the inclined plane and
asked by Kayla 
physics
A 9.0kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. What is the coefficient of kinetic friction,
asked by Mesho 
algebra
What is a reasonable domain and range for this scenario? Water is added to a 30 milliliter solution that is 50% acid. The equation A(X)=15/30+x respresents the concentration of acid,A, in the mixture as x amount of water is added
asked by jjj 
physics
A projectile of mass 0.874 kg is shot straight up with an initial speed of 29.0 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only 7.70 m, determine the magnitude of the average force due
asked by Mesho 
business
a merchandising company wants to include the cost of operating its warenhouse in the cost of inventory, what impact will this descision have on the firm's income stement and balance sheet?:
asked by sassssy 
AP Chemistry
Three gases, xenon, helium, and hydrogen are confined in a 10.0 L vessel at a pressure of 7.0 atm. Intially the vessel contains 3.0 moles of xenon, 2.0 moles of helium, and 2.0 moles of hydrogen. What would the partial pressure of helium be if 5.0 moles of
asked by Paxton 
Math
25 pea pods were broken apart and the number of peas in each pod recorded. the record looked as foolows: # of peas: 2,3,4,5,6 and frequency; 7,9,5,3,1 a. does this data appear to be skewed? b. What is the model class for theis survey?
asked by doris 
science
if we mix 2 substance A and B of 30 degrees celsius and 70 degrees celsius respectively.what will be the temp of the mixture
asked by Nagham 
linear programming app
solve this linear programming problem; A chain saw requires 4 hours of assembly and a wood chipper 6 hours. A maximum of 48 hours of assembly time is available. The profit is $150 on a chain saw and $220 on a chipper. How many of each should be assembled
asked by ash 
math
Some households were questioned about the numebr of can openers they possessed. The results are indicated in the frequency table shown below: # of openers; 0,1,2,3,4 and frequency;1,8,11,7,1 a. does this dtat appear to be skewed? explain b. How many
asked by rita 
Chemistry
Assuming that temperature remains constant, calculate the final volume Pressure of a sample of 45 L of gas is increased and the gas goes from 100 kPa to 125 kPa;
asked by Jill 
business
a merchandising company wants to include the cost of operating its warenhouse in the cost of inventory, what impact will this descision have on the firm's income stement and balance sheet?:do you think the controller is justified in his action. Why?
asked by sassssy 
sociology
Does race effect the self esteem of children?
asked by ami 
sociology
Why lighter skins people thought that they are superior to all others.?
asked by ami 
english
what does limerick and ballad mean ?
asked by cerys 
HCA/240
Hello, I hope you can help me. I have been trying to research on this Cytotoxic/Cytolytic? I finally found a definition but I am looking for an example of this? Do you have nay ideas that can help me? Thanks,
asked by Nikol 
Chemistry
How many joules of heat are needed to heat 25.0 g of ice at 5.0 degrees celcius to a final temperature of 40.0 degrees celcius? The specific heat of ice is 2.1 j. Our teacher mention to consider the state of water present at 40.0 degrees celcius which is
asked by Thao 
physics
A convex mirror has a focal length of 19.0 cm. Determine the object location for which the image will be onefourth as tall as the object. i know that 1/f=1/do=1/di. when i put the numbers into the equation i keep getting 23.75 and its saying that its
asked by julie 
Physics
A hollow, thinwalled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 5.0 m. The cylinder arrives at the bottom of the plane 2.7 s after the sphere. Determine the angle between the inclined plane and
asked by Kayla 
home economics
what are 3 benifits of food imports into ireland?
asked by jennifer 
english
What type of poem is this : Mary Muddles likes splashing in puddles
asked by cerys 
algebra
The question is: find f(x+h) for each and the function given is f(x)=x^3+x after you turn it into f(x+h)=(x+h)^3+(x+h) how do you multiply out the cube?
asked by Sarah 
chemistry
Consider the reaction: A + B −> C If it is 2nd order in A and 0 order in B, a plot of [B]−1 vs time will be... a. linear and negative b. exponential and negative c. linear and positive d. equal to zero e. exponential and positive
asked by Eddy 
AP Calculus
integrate sint(t^2) dt with 0
asked by Sandy 
improving your writing
This was always my worst subject. Can you please check the changes I made? Thank you very much for your time. For the past three months, workrelated problems have occurred in the office and need to be addressed. Before Jessica Hilo’s medical leave, the
asked by jacqui 
Chemistry
I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2 (Theres 3 of them so 2x3=6...then, theres a two out of the brackets so 6 x 2 =12) +2  (12)= 10? And
asked by Jess 
Chemistry
I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2 (Theres 3 of them so 2x3=6...then, theres a two out of the brackets so 6 x 2 =12) +2  (12)= 10? And
asked by Jess 
Chemistry
I have a question which asks... What is the Oxidation number of Nitrogen in Cu(NO3)2 I know the answer is 5+ but how do you get that?? Cu= 2+ O= 2 (Theres 3 of them so 2x3=6...then, theres a two out of the brackets so 6 x 2 =12) +2  (12)= 10? And
asked by Jess 
math
Chris is making a scale drawing of his rectangular room. His room measures 12 feet, 4 inches by 11 feet, 6 inches. He wants his drawing to be onetenth the size of his room. What are the dimensions of his drawing?
asked by nicole 
Math
If you have this set of numbers: 12, 8, 32, 64, 0, 12, 0, 64, 8, 32, & 24, what is the range? 56 or 64?
asked by Heather 
Math
Estimate the measure of volume is 282 cubic inches. The actual volume is 289 cubic inches.what is the relative error of the measurements to the nearest thousandth
asked by Anonymous 
algebra
(y  6)2 = 13
asked by Anonymous 
physics
1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?
asked by arun 
physics
1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?
asked by arun 
physics
2) Two objects, A and B, initially at rest, are "exploded" apart by the release of a coiled spring that was compressed between them. As they move apart, the velocity of object A is 5 m/s and the velocity of object B is 2 m/s. What is the ratio of the mass
asked by arun 
History
Is italy a country?
asked by belle 
calculus
find the derivatives F(x)=8ln(x^52x)
asked by melissa 
calculus
f(x)= x^3/(2x5)^4
asked by melissa 
Spanish Please check
If I ask Manuel if he is in a hurry I could say: Manuel, ¿Tienes prisa?
asked by Sally 
biology
Explain how alignment of chromosomes on the meta phase plate differs in mitosis, meiosis I, and meiosis II. Why are these arrangements important? Can you tell me where zi can find this information? I don't see it in my text. Thank you
asked by sarah 
Science
Which is true please help? A) When international comparative data is normalised it is related to the size of the population of the respective countries. B) The Trendalyzer visualisation in Gapminder World would be unsuitable for visualising how the number
asked by Subash 
Economics & Business
what are the 3 advantages and 3 diasadvantages of having large companies for consumers and other businesses in te same industry.
asked by Anique 
Algebra 2
Find the inverse of: f(x)=(1/2)x+3 form of answer..y= Thank you so much!
asked by Charlotte 
polygons
can you help me unscramble this word loav
asked by caitlin 
Science
A car travelling at 40mph, and it speeds up to 65mph in 0.2hrs, how far does it travel?
asked by Christia 
Science
Blood from all parts of the body, exept the lungs goes to what part of the heart
asked by Bob 
polygons
aerlintg
asked by caitlin 
computer science
in mobile phone network how many times as strong would a signal be expected to be at 200 m from a base station, compare with at 600 m? is it 81 or 9 or 3 or 0.3 or 0.1 or 0.01
asked by Jo 
chemistry
Calculate the molarity of a solution by dissolving 40.0 g NaOH in 1.5 L solution.
asked by Marilyn 
chemistry
Calculate the molarity of a solution prepared by dissolving 25.0 g NaCl in 1.0 L solution.
asked by Marilyn 
chemistry
A student needs to make a dilution from a stock solution. The stock solution is 2.) M NaCl. How much should the student use of the 2.0 M NaCl to make 1.0 L of 0.05M NaCl diluted stock.
asked by Marilyn 
Salisbury University
A spring with 53 hangs vertically next to a ruler. The end of the spring is next to the 21 mark on the ruler. If a 3.0 mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks?
asked by Cara 
chemistry
How would you make a 1.0 L of 0.10M NaOH solution of 10.0M NaOH?
asked by Marilyn 
algebra 2
what is 7^1/2 divided by 7^3/5
asked by john 
MATLAB
Find the value of x (to 2 decimal places) when y is a minimum, using a while loop. Format the answer, e.g., "At x=ii.ii, y=jj.jj is a minimum". Plot the function. y = x^2  4x + 2
asked by Matt 
statistics
You are a travel agent and wish to estimate, with 98% confidence, the proportion of vacationers who use an online service or the Internet to make travel reservations. Your estimate must be accurate within 4% of the population proportion. a) No preliminary
asked by alex 
statistics
Question 1 A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random sample of 15 students
asked by need help 
algebra 2
what is 7^1/2 divided by 7^3/5
asked by john 
math
what is the simpliest form of 11by7
asked by gesu 
Physics
If a gas tap is turned on for a few seconds, someone a couple of meters away will hear the gas escaping long before he or she smells it. What does this indicate about the speed of sound and the motion of molecules in the soundcarrying medium?
asked by Nikki 
english
Good evening, I’m asking some help to improve my english. I’m preparing my first certificate in english of cambridge. I wrote a text with the first sentence given. I’d be so glad if someone help me. Thank you As soon as Roy opened the door, he knew
asked by Thumbelina 
PHysics
The tip of a helicoptor rotor blade can reach speeds of roughly 300 mph (130 m/s). It takes about 30 seconds to get them up to speed and they have a typical radius of 20 feet (6 m). What is the average angular acceleration of the rotor blades as they get
asked by Paige 
spelling
what are ways to sort the words scene, muscle, cereal, and recital?
asked by nicole 
Algebra II
((x1)/3x+15))((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???
asked by Z 
chemistry
If you have 200. mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?
asked by Ashley 
probability
Suppose 1 person is picked at random from this group of dog owners. The probability that the person chosen is at least 50 years old and has at least 1 dog equals
asked by shakara 
I.T
pseudocode for a program that is required to compute the costs of a car trip. The required input values are: Litres per 100km, Distance travelled and Cost per litre of petrol. The out value is the total cost of the trip.
asked by sipho 
science
A giraffe walking at 3m per second accelerates at 2m per second squared to 15 seconds. What speed does it end up at?
asked by Christia 
chemistry
how do you make 1.00g of NaC2H3O2 using: 0.400 M Na2Co3 0.300 M Pb(C2H3O2)2 NaOH solution with unknown molarity 0.500 M HC2H3O2 You don't have to use all of them
asked by stephanie 
Algebra II
((x1)/3x+15))((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???
asked by Z 
Physics
A novice skier, starting from rest, slides down a frictionless 24.0 incline whose vertical height is 215. How fast is she going when she reaches the bottom?
asked by Cara 
Speech Class
True or False, Communication can involve language but not speech.
asked by Jake 
physics
calculate the net charge on a substance consisting of a combination of 2.6e13 protons and 6.0e13 electrons. answer in units of C.
asked by Anonymous 
physics
A 53 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 13 m, and falls a total of 35 m. Calculate the spring stiffness constant k of the bungee cord, assuming Hooke's law applies.
asked by Cara 
chemistry
An experiment is considered a controlled experiment if it contains tests with chemicals.
asked by Ashley Jones 
Math
a room is 18 ft long, 14 ft wide, and 8 ft high, then how would i find the cost of carpeting the floor with carpet costing $5/ft2
asked by Morgan 
physics
A 110kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 420 N. For the first 13 m the floor is frictionless, and for the next 13 m the coefficient of friction is 0.35. What is the final speed of the crate?
asked by Cara 
English
Can you please check the following sentences, please. It's really urgent. 1) Following what Joyce had already done in England and Proust in France, and what, in some way, Sterne had attempted as early as two centuries before, Virginia Woolf therefore
asked by Mike 
Math
a room is 18 ft long, 14 ft wide, and 8 ft high then what is the cost of covering the ceiling with acoustic tile costing $7.50/ft squared
asked by Morgan 
4th grade math
how many thousands are in one million?how many millions are in one billion?
asked by megajolt 
physics
A 280g wood block is firmly attached to a very light horizontal spring, as shown in the figure. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this
asked by Cara 
physics
A 280g wood block is firmly attached to a very light horizontal spring, as shown in the figure. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this
asked by Cara 
math
Given the following set, select the statement below that is true. V = {a, e, i, o, u} (Points : 2) v ∈ V a ∈ V y ∈ V o ∉ V V Ø
asked by nette 
Calc. Checking Answer
Find the antiderivative by hand in each case. S stands for the integral sign I want to make sure I am doing these correctly. A) S x*sqrt(10 + x^2) dx So, u= 10 + x^2 du= 2xdx du/2= xdx (1/2) S sqrt(u) du (1/2)*((u^(3/2))/(3/2)) (1/2)*(2/3)*(u^(3/2))
asked by Chelsea 
math
a factory produces 6 motorcycles in 9 hours write a proportion and solve it to find how many hours it takes to produce 16 motorcycles. help me please!
asked by veronica 
Math
a room is 18 ft long, 14 ft wide, and 8 ft high then how would you find the total cost of renovating the walls, floor, and ceiling!
asked by Morgan 
English
Select the answer that contains the correct punctuation for the following sentence. A diamond is the hardest natural substance it can scratch any other stone. A. The sentence is correct. B. ... substance, it can... C. ... substance; it can... D. ...
asked by anthony 
4th grade math
explain how you rounded 6.987 to the nearest tenth.
asked by megajolt 
Calculus
Write the logarithm of a single quantity: 2ln(x)+ln(4)(1/2)ln(9)
asked by Zoe 
computer science
what are the advantages and disadvantages for having multiple versions for one site?
asked by nee nee 
Chemistry
How many grams of Mg are needed to react completely with 3.80 L of a 2.50 M HF solution? Mg + 2HF > MgF^2 + H^2
asked by Lexa 
Physics
If one machine creates a level of 90 decibels, what decibel level would be generated by 50 of these machines? If sounds are created at random, the net intensity is found by adding the individual intensitiesnot the decibels. Ignore distance effects.
asked by Lindsey 
Chemistry
How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.90g of Fe2O3 with enough carbon monoxide to produce iron metal? Fe2O3 + 3CO > 2Fe + 3CO2 dH=24.8kJ How do you find q (of the 2Fe in kJ).
asked by Chris 
Physics
What is the fundamental frequency, the first three overtones of an organ pipe that is 100cm in length ans is closed on one end and open on the other? Take the speed of sound to be 345 m/s.
asked by Lindsey 
statistics
which has a larger standard deviation: the distribution of weekly allowances to 12year olds or the distribution of monthly household mortgage payments?
asked by Jerome 
math
Without writing them all out, what is the number of subsets of set A ={king, queen, knight, prince, princess, duke, earl}?
asked by nette 
math
The ratio of the number of postcards john had to the number of postcards Zachary ha d was 4:9. Zachary had 45 more postcards than John. After giving some postcards to John, Zachary had 6/7 as many postcards as John. (A) How many postcards did Zachary have
asked by Katherine 
Math
You are ﬁ ve feet tall and cast a sevenfoot eightinch shadow. At the same time, a basketball hoop casts a 19foot shadow. How tall is the basketball hoop? Assume the triangles are similar.
asked by Leila 
English
I forgot to add the following sentences. I really hope you can have a look at them. She assured/informed me that the money had been paid. 1) She promised me that the money would be paid. She confirmed/explained/thought/reported/added that the money had
asked by Mike 
chemistry
What would happen if NaOH was added to CuSO4
asked by Anonymous 
Calculus (pleas help!!!)
Find the formula for a function of the form y=Asin(Bx)+C with a maximum at (0.5,0), a minimum at (1.5,−4), and no critical points between these two points.
asked by Karku 
simple subject and predicate
Many useful tools are made from metal.
asked by lauren 
chemistry
If 50.0 g of sodium bicarbonate is reacted and 11.0 g of carbon dioxide is produced, what is the percent yield of carbon dioxide? 2NaHCO3 > Na2CO3 + CO2 + H2O
asked by Felix 
physics
How does pressure work as a restoring force to create a sound wave?
asked by John 
Chemistry
What is the pH of a solution that results from the addition of 5mL of 0.1 M HCl to 50mL of pure water?
asked by Anonymous 
Chemistry
Determine the grams of NaOH that could be absorbed by the SO3/HSO3 buffer before the base absorbing capacity of this buffer were destroyed.
asked by Anonymous 
Salisbury University
How long will it take a 480 N motor to lift a 335 kg piano to a sixthstory window 15.0 m above?
asked by Cara 
geometry
The Volumes of two similar figures are given. The surface area of the smaller figure is given. Find the surface area of the larger figure. V= 27m^3 V= 64m^3 S.A.= 63m^2
asked by Mr. Moo 
chem
How many liters of 12.3 molar NaOH stock solution will be needed to make 12.4 liters of a 1.2 molar NaOH solution? Show the work used to solve this problem.
asked by jose 
Math
Karla walks 8/10 mile to the library. About how many miles does she walk?
asked by Gina 
Physics
When throwing a ball, a pitcher exerts a torque of 150 N m for 0.15 seconds onto their arm before letting go of the ball. With an arm length of 0.9 m with inertia 0.6 kg m2, what is the speed of the ball just after it is released?
asked by Sara 
Math
Today, Harry mowed the lawn and weeded the garden. Usually, he mows the lawn every 6 days and weeds the garden every 4 days. How many days is it until Harry will again mow the lawn and weed the garden on the same day?
asked by Gina 
Math
A picture of a statue is drawn to scale 1:5 If the height of the statue in the picture is 5/6, what is the actual height of the statue?
asked by Itiel 
chem
Calculate the pH of each of the following solutions. (a) [H3O+] = 2.9 1010 M I got 9.5 but its wrong. I used the equation pH= log[H3O+] Is this the wrong equation? (b) [H3O+] = 6.4 102 M thanks:)
asked by Beth 
chemistry
the mass of cobalt60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info calculate the halflife of cobalt60
asked by shaleena 
chemistry
the mass of cobalt60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info calculate the halflife of cobalt60
asked by shaleena 
English
I really need you to check these sentences on Owen's poem please. 1)In the second stanza, most of the soldiers succeed in putting on their clumsy gas masks. Someone, however, is still crying out for help, unable to move quickly and easily enough to put on
asked by Mike 
Physics 203
The system shown below is released from rest. The mb = 35 kg block is 2 m above the ledge. The pulley is a uniform disk with a radius of 10 cm and mass M = 5.0 kg. Assume that the string does not slip on the pulley. (a) Find the speed of the 35 kg block
asked by Kayla 
human services
i need to write a paper on a time i was discriminated against and how it changed or did not change i am at a loss any help
asked by searie 
trig
Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Does this question even make sense?
asked by justin 
Algebra II
((x1)/3x+15))((x+3)/(5x+25)) HOW TO SIMPLIFY THAT???
asked by Z 
psychology
Are the cognitive intervention tools: operant conditioning, cognitive rehearsal, positive reinforcement, and journaling? I just want to know if this is correct.
asked by Mary 
Chemistry
1.What is the molarity of a solution of silver perchlorate, AgClO 4, if 3.2 moles of silver perchlorate are dissolved in 1.5 liters of water?
asked by Barbara 
reading
In this passage I need to find the main idea and 3 supporting details. You have probably gone on a merrygoaround. Theres one at most theme and carnivals. You find a painted horse or other animal. You climb up on its back. Most of the animals are on the
asked by christy 
Math
Triangle XYZ is dilated by a factor 1/2. What is the ratio of the area of triangle XYZ to the area of it's image, triangle X'Y'Z'?
asked by Airelle 
Chemistry
1.What is the molarity of a solution of silver perchlorate, AgClO 4, if 3.2 moles of silver perchlorate are dissolved in 1.5 liters of water?
asked by Barbara 
Science
What causes a penulum to continue swinging? Answer In 5 sentences
asked by Itiel 
Statistics
According to a poll, 20% of adults smoke. In a random sample of 75 adults, 30 are smokers. Is this unusual?
asked by Anonymous 
English
Select the answer that contains the correct punctuation for the following sentence. Presidents wives have always played important social roles. A. The sentence is correct. B. President's' wives... C. President's wives... D. Presidents' wives... I think
asked by anthony 
geometry
If the polygon is an equilateral triangle where each side is 24 inches long what is the apothem?
asked by Anonymous 
World history
why did Germany grow as an industrial power under otto von bismarck.
asked by bilal 
Calculus (pleas help!!!)
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
asked by Claudia 
World history
what is the Kulture kampf
asked by bilal 
World history
what was the foreign policy of william the 2nd
asked by bilal 
Science
Answer in 5 sentences What causes a pendulum to continue swinging?
asked by Danniela 
World history
why did the revolution of 1900s take place
asked by bilal 
World history
how did the german goverment encourage economic developlment?
asked by bilal 
World history
in which country was nationalism the biggest threat?
asked by bilal 
anatomy
Compare and contrast the two feedback mechanisms our bodies use to maintain homeostasis what would happen if our thermoregulation used positive feedback to maintain homeostasis
asked by mark 
Geography
Name some Australian Icons, excluding animals. I am SOOOOOOOO stuck on this! All I can think of are Koala's and Kangaroos...
asked by Rissa 
math
Find a value of n when the sq. root of n^2 is NOT n.
asked by ABC123DOREMI 
math algebra help please!
12 points lie on a circumference of a circle how many inscribed triangles can be constructed having 3 vertices?
asked by Steph 
MATH
What is $1294.00 Plus HST? HST = 12%
asked by Anonymous 
biology
What is the typical ratio for a dihybrid cross between two parents that are double heterozygotes?
asked by stella 
physics
alpha particles are accelerated through a potential of 1000volts and then enter a magnetic field 0.2T perpendicular to the their direction of motion.Calculate the radius of the circular path that they traverse.An alpha particle has a mass 6.68x 10^27kg
asked by kb 
math algebra help please!
3 dice are rolled let (y,r,b) represent each outcome? a sample space b prob rolling a sum of 18 c prob of rolling a sum less than 5
asked by Zach 
spanish
Rewrite each statement two ways using object pronouns. Tengo que leer los libros en una semana.
asked by Nick 
english
Are the pronoun refrences clearly started in these sentences? 1. The governor t told the mayor that she would win by a landslide. 2. When the mayor thanked the governor, she was happy. 3. People who wish to vote must do so before 7:00 p.m., for after that
asked by Aanthony 
english
Which element of a short story would be most important to a story about a mad scientist stealing a secret weapon?
asked by jess 
math
a single numbered standard cube is tossed. what is the probability of getting a number other than nine
asked by sergio 
PreAlgreba
The ratio of the number of postcards john had to the number of postcards Zachary ha d was 4:9. Zachary had 45 more postcards than John. After giving some postcards to John, Zachary had 6/7 as many postcards as John. (A) How many postcards did Zachary have
asked by Angie 
MATH
Consider following situation.. You are going to buy this laptop at $1294.00 plus HST. You can also pay $50 a month for 30 months with down payment of $100. Compare following 3 scenarios using spreadsheets to calcuate how much you will pay. 1st Scenario:
asked by Anonymous 
chemistry
I need help with the equilibrium constant, i understand it but I don't understand the last step when you have to change or find the exponent?
asked by HS 
physics
A tank filled with water has marks every 10 cm on one wall. The refractive index is 1.33 for water in the tank. You observe the marks out in air, from the opposite wall and with your eye level with the top of the water. Which is the lowest or highest mark
asked by crystal 
math
how would you solve this equation? 294 sin^2 theta = 196 sin 2 theta
asked by alexa 
English
Rewrite the sentences with the pronoun refrences clearly stated.. 1. The governor told the mayor that she would win by a landslide. 2. when the mayor thanked the governor, she was happy. 3. people who wish to vote must do so before 7 pm, for after that you
asked by Anthony 
Chemistry
Write the equation for the dissolution of (NH4)2S04 in water. How many moles of each type of ion, and how many total moles of ions does the dissolution of 0.5 mol of (NH4)2S04 produce? help pleaseeeeee ASAP
asked by Kelly 
Physics
You are riding a bicycle at a speed of 15 m/s. The bycicle has tires with diameters measuring 630 mm. You can approximate each tire as a solid cyllinder (to calculate inertia) with a mass of 0.5 kg. What is the total rotational kinetic energy of the
asked by Anonymous 
project management
Does anyone have the audit of the gauchito project plan
asked by project management 
Physics
Which of the following events does not involve a change in angular momentum? 1. A spinning ice skater drawing in her arms to increase her rotational speed. 2. A child walking along the perimeter of a merrygoround as it rotates. 3. A child walking towards
asked by Anonymous 
chemistry
Write the overall ionic equation and the net ionic equation for the reaction between BaCl2 and Na2SO4 in aqueous solution, indentify the spectator ion and the precipitate ion for this reaction. help :(
asked by Kelly 
algebra
t squared plus 10t plus 16
asked by ruth 
science
if you observe that the air pressure is decreasing, what type of weather will it bring?
asked by jordonna 
Calculus Please Help
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
asked by Claudia 
marketing please help me
please can you help me for this question to get the right answer,,,, distinguish among a product modification a minoy innovation and a major innovation.present an example of each for a hotel
asked by jessie 
science
Compare table salt with glucose.
asked by unknown 
Math
Wendy answered 85% of the questions other history test correctly . There were 40 questions on the test and all the questionable had equal value. How many questions did Wendy not answer correctly on her test?
asked by SunnyDee 
science
write a brief paragraph that tells how the words matter,element,atom,crystal,compound,and molecule relate.
asked by unknown 
Physics
What is the magnitude of the force per meter of length on a straight wire carrying an 8.50 A current when perpendicular to a 0.55 T uniform magnetic field?
asked by Samantha 
topics of math
A population is normally distributed with mean 43.7 and standard deviation 5.2. Find the following probability. (Round your answer to four decimal places.) p( x > 55.0 )
asked by Hannah 
physics20
DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
asked by Ty 
physics
In preparation for a demonstration on conservation of energy, a professor attaches a 7.2kg bowling ball to a 3.4mlong rope. He pulls the ball 23° away from the vertical and holds the ball while he discusses the physics principles involved. Assume that
asked by Anonymous 
Chemistry
If you have 200 mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?
asked by asdffffff 
physics 20
DYNAMICS: a skier starts at the top of a 30m hill ta an anle of 20 degrees. the skier goes straight down the firctionless slope. How long will it take the skier to get to the bottom?
asked by Ty 
ap chemistry
For propanoic acid (HC3H5O2, Ka = 1.3 105), determine the concentration of all species present, the pH, and the percent dissociation of a 0.29 M solution. [H+] [C3H5O2] [OH ] [HC3H5O2] pH percent dissociation
asked by Ryu 
Physics 20
dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once moving, how much force is
asked by bob 
chem
Calculate [H3O+] for each of the following solutions. a)pH = 8.59 i got 3.00e9 but it said it was wrong. what am i doing wrong. im using the equation 10ph = [H30+]
asked by Beth 
Accounting
Alteran Corporation purchased a machine for 1.5 million in 2006. The machine is being depreciated over a 10year life using the sumoftheyears'digits method. The residual value is expected to be $300,000. At the beginning of 2009, Alteran decided to
asked by Bobbi Loffredo 
Physics 20
Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?
asked by peter 
physics 20
DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
asked by peter 
Writing
The propmt is Write a story about a time that I did something that caused me to feel pride in myself. What is this action and why did it make me feel pride in myself. I need help writing a story into this and you proofread and revise my grammaticly
asked by Rebecca 
chemistry
Consider the following reaction Al(OH)3 + 3HCL ____>ALCL3 How many milliltres of 0.8 M HCL will react with 2g of AL(OH)3 ??
asked by roro 
Accounting
Janes Company provided the following information on intangible assets: a. A patent was purchased from the lou Company for $700,000 on January 1, 2007. Janes estimated the remaining useful life of the patent to be 10 years. The patent was carried on Lou's
asked by Bobbi Loffredo 
physics
1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?
asked by arun 
math
2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.
asked by arun 
math
a shipping box is shaped like a rectangular prism.it has a total volume of 96 cubic inches. the height is two inches less than the width. what are the dimensions of the box?
asked by briana 
Language arts
What kind of sentence is: The state park in the rocky mountains is beautiful, lots of things to do.
asked by Troy 
Math
Write two numbers that have the given absolute value. 4 38 260 4092 I know one is 4 but do not know the second unless it is 4 Do not have no clue can someone explain?
asked by Scott 
physics
A ladder of mass 34.4 kg and length 3.36 m is leaning against a wall at an angle θ. The coefficient of static friction between ladder and floor is 0.326; assume that the friction force between ladder and wall is zero. What is the maximum value that θ can
asked by Anonymous 
Chemistry
A sample of iron with a mass of 75.66g and an initial temperature of 15.38C gains 10480 Joules. What is the final temperture?
asked by Lewis 
math
if i am solving a linear combanation nd it is y=2+5 and 2x+7y
asked by lasharon 
Physics
A car of mass = 1200 traveling at 60.0 enters a banked turn covered with ice. The road is banked at an angle , and there is no friction between the road and the car's tires.What is the radius of the turn if = 20.0 (assuming the car continues in uniform
asked by Brooke 
Math (logarithmic functions)
Those are the only ones I can't seem to resolve. Thank you! resolve x: 1) 9*3^0,51x = 315 2) 10*3^15x+21 =363*2^9x+51 3) log(15x^2)  log(3x) = 4*log(3) 4) log[of base 3]*(15x + 4) = 3
asked by Ralph 
Chemistry
How does HI(g) split into H and I? 1. Does it collide with another HI(g) and energy is lost? or the electron being shared gets dislocated? 2. If so, then can HI(g) collide with anything (H or I or the wall) to split up?
asked by BlahxD 
Math
14. Parks A survey of 300 parks showed the following. 15 had only camping. 20 had only hiking trails. 35 had only picnicking. 185 had camping. 140 had camping and hiking trails. 125 had camping and picnicking. 210 had hiking trails. Find the number of
asked by Sarah 
Chemistry
How does HI(g) split up into H and I. 1. Does it collide with another HI(g) and energy is lost? or the electron being shared gets dislocated? 2. If so then, can HI collide with anything ( H, I, the wall) to break down into H and I?
asked by BlahxD 
Chemistry!
a microwave oven uses electromagnetic radiation with a wavelength of 3.00x10^6 nm. calculate energy (in joules) of 1.65 moles of photons of this radiation.
asked by Rachel 
Chemistry
How does HI(g) split up into H and I. 1. Does it collide with another HI(g) and energy is lost? or the electron being shared gets dislocated? 2. If so then, can HI collide with anything ( H, I, the wall) to break down into H and I?
asked by BlahxD 
Physics
A 5.o kg box is lifted to a height of 10 meters at a constant speed. a)How much power is required to complete this task in 10 seconds? b)Calculate the velocity of the box just as it hits the ground? i have the answers but i need a second opinion a)50 watts
asked by Mexico 
World history
What was the foreign policy of William the 2nd?
asked by Demond 
math
Prove eachh mathematical statement for integers m,n,k,p,a,b 12. For every prime p and nonzero n we have n^2 is congruent to nMODp if and only if either n is congruent to 1MODp or n is congruent to 0MODp.
asked by Anna 
physics
A light ray parallel to the optical axis of a glass sphere of radius R enters the sphere at height H above the axis (H
asked by crystal 
Physical Geography, Earth Science
Who were the four other major contributors to the development of modern astronomy after Copernicus? Explain what those contributions were. Finally, why did it take so long for the geocentric view of the universe to be overthrown and what does that tell us
asked by Chaseone 
Science
what is biomass?
asked by Anonymous 
Physics
A 5.o kg box is lifted to a height of 10 meters at a constant speed. a)How much power is required to complete this task in 10 seconds? b)Calculate the velocity of the box just as it hits the ground? i have the answers but i need a second opinion a)50 watts
asked by Mexico 
math
a hotel chain charges $120 per room and rents an avg of 40 rooms per night at this rate. For each $10 reduction in price, they rent an avg of 10 more rooms. Find the rate they should be charging to maximize revenue. Help please! Thanks!
asked by cat 
math
a hotel chain charges $120 per room and rents an avg of 40 rooms per night at this rate. For each $10 reduction in price, they rent an avg of 10 more rooms. Find the rate they should be charging to maximize revenue. Help please! Thanks!
asked by cat 
Ap physics b
A piece of copper wire is formed into a single circular loop of radius 11 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.65 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 102 /m.
asked by christina 
Art Appreciation
Explain how Florence reflects the ideals of the dominant citystate and how some of the geographical, economical, social, and artistic forces shape this ideal. Use one example from Gardener’s Art through the Ages and one example from the Internet.
asked by Alice 
MATH
Im Struggling with this assignment here. Would like help ASAP. Consider following situation.. You are going to buy this laptop at $1294.00 plus HST. You can also pay $50 a month for 30 months with down payment of $100. Compare following 3 scenarios using
asked by Anonymous 
Physics
The Hubble Space Telescope orbits the Earth at an approximate altitude of 612 km. Its mass is 11,100 kg and the mass of the Earth is 5.97×1024 kg. The Earth's average radius is 6.38×106 m. What is the magnitude of the gravitational force that the Earth
asked by Denise 
Microbiology
What is the purpose of agar in media?
asked by Dakota 
Microbiology
How would you determine whether a colony was a containminant on a streak plate?
asked by Dakota 
Physics
The Hubble Space Telescope orbits the Earth at an approximate altitude of 612 km. Its mass is 11,100 kg and the mass of the Earth is 5.97×1024 kg. The Earth's average radius is 6.38×106 m. What is the magnitude of the gravitational force that the Earth
asked by Denise 
grammar
how can i rephrase this sentence WITHOUT using any personal pronouns do you think the dough will rise the fastest in the sample with the highest, lowest, or a moderate concentration of sugar? thank you!
asked by Sara! 
College Algebra
What is the difference between direct variation and joint variation and please put into words an example.
asked by Kathy 
trig
If an equilateral triangle has a side of 10 ft what is its altitude to two significant digits
asked by Michelle 
geometry
Consider the coordinates given and decide whether BC and DE are parallel, perpendicular, or neither B(3, 3), C(3, 7), D(6, 5), E(0, 4) B(4, 7), C(1, 2), D(2, 8), E(4, 10) B(4, 0), C(2, 2), D(1, 4), E(2, 7)
asked by Step 
Calculus (urgent!!)
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
asked by Claudia 
Workplace Hazards and Safety
Describe and explain 5 rights and/or responsibilities of the worker with regards to safety in the workplace. This is the information I have: Worker's responsibilites: Cooperate with the joint committee or worker health and safety representative,
asked by Anonymous 
geomery b
I need help understanding this so please help me?? 1. A table is 4 ft high. A small model of the table is 6 in. high. What is the ratio of the height of the model table to the height of the real table? 2 : 3 1 : 6 1 : 8 2 : 6 2. If a/b = 9/10, complete
asked by Jesicca 
Calculus (pleas help!!!)
Let f(x)=e^(2x)kx, for k greater than 0. Using a calculator or computer, sketch the graph of f for k=1/9, 1/6,1/3,1/2,1,2,4. Describe what happens as k changes. f(x) has a local minimum. Find the location of the minimum. x= ____ Find the ycoordinate of
asked by Eva 
Math
how does (2) / √[(2+√(2))] become (2√(2))√[(2+√(2))] steps too please
asked by Amy 
math
how to put weights in order from least to greatest
asked by tyana 
chemistry
The Ka for hydroflouric acid is 4.5 *10^4 at 298K. Calculate the amount of sold NaF that is required toprepare a 250. mL acidic buffer with pH = 2.75. The inital molarity of hydroflouric acid is .250M but you have only 75mL. Part 2 Recalculate the pH of
asked by John 
Finance
what would happen if i had a credit card with $2000 dollars on it with an interest rate of 10%.the minimum payment is $50 a month how long would it take to pay off
asked by dana 
English
Describe and explain 5 rights and/or responsibilities of the worker with regards to safety in the workplace. This is the information I have: Worker's responsibilites: Cooperate with the joint committee or worker health and safety representative,
asked by Anonymous 
Physics 20
Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?
asked by peter 
math
Consider the function f(x) whose second derivative is f''(x) = 5 x + 6 \sin (x). If f(0) = 4 and f'(0) = 2, what is f(x)?
asked by thomas 
accounting
a merchandising company wants to include the cost of operating its warehouse in the cost of inventory. The company’s controller argues that the cost of the warehouse is a reasonable and necessary cost of getting the inventory ready for sale and,
asked by nisa 
math
The density of a crystal is 2.65 grams per cubic centimeter. Ryan has a rectangular prism made of quartz. It measures 10 cm by 10 cm by 6 cm. Find the weight of this crystal in kilograms.
asked by Dan 
chemistry
How many molecules water are produced from 33 g lithium hydroxide? and work the slove
asked by Austin5 
English
Please check for comma errors. If I need to add any commas or take some out please show me where. Thank you!! You seem to be progressing nicely after your back surgery; however, I do want to remind you of the importance of the instructions that was give to
asked by Angela 
EnglishHelp
Please check for commas errors. If I need to add or take out any commas, please show me where. Have you quit trying to train your dog? Don’t be discouraged. We have the answer to your problem. Professional obedience training can make an amazing different
asked by Angela 
Calculus (urgent!!)
Find a formula for a curve of the form y=e^((−(x−a)^2)/b) for b greater than 0 with a local maximum at x=−5 and points of inflection at x=−8 and x=−2.
asked by Claudia 
Calculus Please Help
If 1100 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box. I'm supposed to type the answer in cubic centimeters... my answer was 2500 cm^3 but it's wrong... I have also
asked by Eva 
ENGLISH
Please check for commas errors and capilization. If I need to add or take out any commas, please show me where. Nashville, TN, November 9, 2011: Anisha Carter was named the new president of M& M Industries, and will take commands of the company on November
asked by Angela 
math
the density of a diamond is 3.52 grams per cubic centimeter. Sally has a diamond that has a volume of 20 mm^3. What is the weight of the diamond?.
asked by Dan 
chemistry
210 210 Pb > Bi + ? 82 83 60 0 Co > ? + e 27 1 I need an explanation on how to find the missing product.
asked by andrew 
EnghlishNow
Please read any if I need to add any commas or delete any, please let me kow where. Thank you!! Your presentation the Martin Managerial Conference in Chicago was excellent. While you were speaking, the audience was more attentive than they had been at any
asked by Angela 
Math
If you pay 3.5 % interest over 4 years and the interest earned is $498.40 what is the principal
asked by Michelle 
Help with English
Pleae check for any comma errors or capialization.If I need to add or delete any commas, please let me know where. Thank you!! You are invited to our private inventory sale, beginning on Wednesday, June 1 through Saturday, June 12. It is a Kingston
asked by Angela 
Calculus Please Help
Let f(x)=e^(2x)kx, for k greater than 0. Using a calculator or computer, sketch the graph of f for k=1/9, 1/6,1/3,1/2,1,2,4. Describe what happens as k changes. f(x) has a local minimum. Find the location of the minimum. x= ____ Find the ycoordinate of
asked by Eva 
English
1. The guide (lead, led) the hikers to the river. 2. Marlo has (passed, past) the fitness test with flying colors. 3. By the time we got to the store, it was (already, all ready) closed. 4.Honesty is just one of the (principals, principles) of Tamika's
asked by Hayley 
CALC
point on the hyperbola 9x^2−6y^2=10 closest to the point (0, 7). y coordinate of each point= ? positive x coordinate= ? negative x coordinate= ?
asked by Adrianna 
Chemistry
A vilatile liquid was allowed to evaporate in a 43.298 g flask that has a total volume of 252 ml. The temperature of the water bath was 100 degree Celsius at the atmospheric pressure of 776 torr. The mass of the flask and condensed vapor was 44.173 g.
asked by Linda 
Chemistry
Would the molar mass become high or low if the hole in aluminum foil was quite large?
asked by Linda 
physics 20
DYNAMICS: a skier starts at the top of a 30m hill ta an anle of 20 degrees. the skier goes straight down the firctionless slope. How long will it take the skier to get to the bottom?
asked by peter 
Chemistry
Would the molar mass become high or low if water vapors condensed under the aluminum foil before the final weighing?
asked by Linda 
physics
DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
asked by peter 
Physics 20
dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once moving, how much force is
asked by peter 
Calculus (pleas help!!!)
Let p(x)=x^2(a−x), where a is constant and a greater than 0. Find the local maxima and minima of p. (Enter your maxima and minima as commaseparated xvalue,classification pairs. For example, if you found that x=−2 was a local minimum and x=3 was a
asked by Claudia 
poetry
What form of poetry are Robert Frost's "The Road Not Taken," and "Saturday Night" by Alden Nowlan? Thanks!
asked by Misha 
psychology
the more people there are at the scene of an accudent, the less likely it is that individuals will step up to lend a hand this phenomeon is referred to as? a.)antiscoial behavior b.) diffusion responsibility c.)crowd apathy d.) diffusion of interest
asked by alisha s 
chemistry1
how much heat is needed to melt 25.4 grams of iodine at its melting point?(Hfusion+61.7J/g)
asked by kara 
Chemistry
Explain exactly how you would make 1 liter of a .10 M acetic acid solution using vinegar from the lab as the stock solution to be diluter.
asked by Haley 
chemistry
how much heat is needed to change 20 g of solid water at 0 c to liquid water at 15 c?
asked by Shawnie 
Physics 20
DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
asked by peter 
physics
A convex mirror has a focal length of 19.0 cm. Determine the object location for which the image will be onefourth as tall as the object. i really need help on this one. im completely stuck!
asked by julie 
math
If you triple 4 and subtract 2 each day, how many days until you have zero?
asked by JOE 
Finance
You have just placed $1,500 in a bank savings deposit and plan to hold that deposit for eight years, earning 5½ percent per annum. If the bank compounds interest daily, what will be the total value of the deposit in eight years? How does your answer
asked by cortesa 
algebra
Find f(x) and g(x) such that f(g(x))= square root of x over 6 square root of x+5 .
asked by marjorie 
Chemistry
An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured temperature of 99.8 C. The flask is sealed, cooled to room temperature, and weighed. The mass is now 129.225g. The measured P atm is 757.7 torr. The flask is
asked by Shannon 
physics
A canoe of mass 70 kg with a paddler of mass 55 kg are in a river. If the river's current exerts a force of 15 N [E] while the paddler is paddling with an average force of 22 N [N38degreesW], find the acceleration of the canoe and paddler. Use both a
asked by Jess 
Chemistry
Consider the reaction 2 SO2 + O2 in equilibrium with 2 SO3 . At 25°C Ho = 197.78 kJ and So = 187.95 J/K. Using this information, calculate the equilibrium constant for the reaction at 50°C. (R = 8.314 J/K) Enter your answer using TWO significant
asked by Laura