Questions Asked on
March 27, 2010

Chemistry
The equation for the complete combustion of ethene (C2H4) is C2H4(g) + 3 O2(g) ==> 2CO2(g) + 2H2O(g) If 2.70 mol C2H4 is reacted with 6.30 mole O2, identify the limiting reagent. show all work.
asked by Danny 
Buffer solution
Solve an equilibrium problem (using an ICE table) to calculate the pH. a solution that is 0.205 M in CH3NH2 and 0.110 M in CH3NH3Br. i used th Ka of CH3NH2 and set up the problem as Ka=[H3O][CH3NH2]/[CH3NH3Br], but that was wrong. So i switched the
asked by Kyle 
physics
A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre
asked by Edwin 
chemistry
Q.1 What will be the pH at the equivalence point during the titration of a 100 ml 0.2M solution of CH3COONa with 0.2M of solution of HCl?(Ka = 2*10^5) Q.2 Aniline behaves as a weak base.When 0.1M,50ml solution of aniline was mixed with 0.1M,25ml solution
asked by gaurav 
physics
An open tank holds water 1.25 m deep. If a small hole of cross section area 3cm^2 is made at the bottom of the tank, calculate the mass of water per second initially flowing out of the hole. (g=10m/s^2, density of water= 1000 kgm^3)
asked by Edwin 
chm152
When solid NH4HS is placed in a closed flask at 28 C, the solid dissociates according to the equation: NH4HS(s) NH3(g) + H2S(g) The total pressure of the equilibrium mixture is 0.766 atm. Determine Kp at this temperature. Choose one answer. a. 0.147 b.
asked by ami 
math(advanced algebra&trigonometry)
the expression cos4x cos3x + sin4x sin3x is equivalent to which one of the following is the answer: 1) sinx 2) sin7x 3) cosx 4) cos7x
asked by Rony 
physics
A small piece of cork in a ripple tank oscillates up and down as ripples pass it. If the ripples travel at 0.20m/s, have a wavelength of 15mm and an amplitude of 5.0mm, what is the maximum velocity of the cork?
asked by Edwin 
Chemistry
What is the percent yield if 4.65g of copper is produced when 1.87g of aluminum reacts with an excess of copper(II) sulfate? 2Al(s)+3CuSO4(aq)==>Al2(SO4)3(aq)+3Cu(s)
asked by Keith 
physics
A car initially traveling at 31.0 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires
asked by Kelsey 
astronomy
The great galaxy in Andromeda has an angular diameter along its long axis of about 5 degree. Its distance is about 2.2 millons light years. What is its linear diameter.
asked by b 
trig
Prove that tan4x=(4tanxtan^3x)/(16tan^2 x+tan^4 x) *note: the exponents are just numbers. there are no variables in the exponents.
asked by Anne 
chemistry 121
Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by moisture in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Suppose that the microwave radiation has a
asked by andrea 
physics
(a) What is the tangential acceleration of a bug on the rim of a 6.0 in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5.0 s? m/s2 (b) When the disk is at its final speed, what is the tangential velocity of the bug? m/s (c)
asked by Kelsey 
mathword problem
In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data
asked by KiKi 
window XP
Which of the following is true of the Encrypting File System (EFS)? a. The Encrypting File System provides encryption for data files stored locally using the file systems supported by Windows XP Professional. b. If the file owner loses the private key used
asked by John 
physics
A special prototype model aeroplane of mass 400g has a control wire 8cm long attached to its body. The other end of the control line is attached to a fixed point. When the aeroplane flies with its wings horizontal in a horizontal circle, making one
asked by Edwin 
algebra
A farmer decides to enclose a rectangular garden, using the side of a barn as one side of the rectangle. What is the maximum area that the farmer can enclose with 100 ft. of fence? What should the dimensions of the garden be to give this area? The max.
asked by Terri 
Physics
A converging thin lens made out of crown glass (n=1.52) has a focal length f=1.0m An identical lens (same radius for the spherical surfaces), made out of a highindex plastic with n=1.70 will be ... A. Converging with a focal length smaller than 1.0 m B.
asked by mm 
trig
solve the equation 2 tan^2(theta)sin(theta)tan^2(theta)=0 interval[0,360)
asked by stacey graham 
physics help!!!
particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a onedimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then
asked by beav 
astronomy
A light bulb radiates most strongly at a wavelength of about 3000 nanometers. How hot is its filament?
asked by b 
Statistics
How does the law of large numbers affect you as a gambler in a casino? As the owner of the casino? Why do people still patronize casinos? How is the law of large numbers relevant to healthcare studies?
asked by Liz 
math help plz!
DigiCom wants to drop the effective rate of interest on its credit card by 2%. If it currently charges a nominal rate of 8% compounded daily, at what value should it set the new nominal rate? Note: Please make sure your final answer(s) are in percentage
asked by Amy 
Business Law
Business Law Exam 210 True Or False questions. 1. Both "commom law: contracts and UCC contracts are subject to the plain menaing rule only if they are simple and plain contracts. 2.when a term in a contract is ambiguos, it is generally interpreted in favor
asked by Jason 
Chemistry
When you balance equations, do you treat polyatomic ions as one unit or treat the different elements in the ion separately? Because if you treat them as one unit, then what if the elements get separated in the products side of the equation?
asked by Emily 
macroenconomics
Between 1968 and 1980, the US economy experienced a slowdown in productivity growth. However, since the mid 1980s, the economy has experienced increases in the growth rate in productivity. Can you give reasons why US productivity growth started to increase
asked by Ismael 
math
Bert is planning to open a savings account that earns 1.6% simple interest yearly. He wants to earn exactly $240 in interest after 3 years. How much money should he deposit?
asked by melanie 
chm152
Consider the following equilibrium: 5.0 moles of are placed in a 10.0 L flask at 200 C and allowed to come to equilibrium. Analysis shows that 1.0 mole of is present in the equilibrium mixture. How many moles of Cl2 are present at equilibrium. Choose one
asked by ami 
Math
The radius needed to create a sphere with a given volume V can be approximated by the equation r = 0.6(V)^1/3. Find the radius of a sphere with a volume of 729 cubic meters. Round the answer to the nearest hundredth.
asked by Anonymous 
English
1. Why do you not like becoming a journalist? Because I want to become an office worker. 2. Why don't you not like becoming a journalist? Because I want to become an office worker. (Are both questions the same? Are the answers suitable for each question?)
asked by rfvv 
English
What do you think about the movie. 1. I thought it was really fun. 2. I thought it was real fun. 3. I thought it was really funny. 4. I thought it was real funny. 5. I thought it was great fun. 6. I thought it was really fun. 7. I think it was a great fun.
asked by rfvv 
Calculus
Use differentials (or, equivalently, a linear approximation) to estimate the given number. sqrt100.4
asked by Morgan 
math help plz!
j=6.50% m=Daily(365) f(effective rate)=? f=(1+i)^n =(1+(.0650/365))^365 =1.0671528481 =0.067152848 =6.72% i know how to find the "f" but if its j=? m=Quarterly(4) f=3.25% how do i find the "j"???
asked by Amy 
business law
. John, Lesa, and Trevor form a limited liability company. John contributes 60% of the capital, and Lesa and Trevor each contribute 20%. Nothing is decided about how profits will be divided. John assumes that he will be entitled to 60% of the profits, in
asked by Anonymous 
Physics 121
A bicycle wheel has a radius R = 32 cm and a mass M = 1:80 kg which you may assume to be concentrated on the outside radius. Assume that you apply a force F to a sprocket so that the wheel has an angular acceleration ® = 4:50 rad/s2. A resistive force f =
asked by claudia 
Statistics for Decision
Calorie Level Fiber Type High Calorie Low Calorie Totals High Fiber 18 4 22 Medium Fiber 23 6 29 Low Fiber 12 21 33 Totals 53 31 84 1. What is the probability that the cereal would be high calorie? In other words, what is P(high calorie)? 2. What is the
asked by megan 
mathword problem
In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data
asked by KiKi 
window XP
Windows XP Professional can accommodate the addition and removal of many types of devices. The installation of a device results in the installation of drivers and allocation of resources. Subsequent removal of the device can result in this information
asked by John 
statistics
Use the Standard Normal Distribution table to find the indicated area under the standard normal curve. Q1: Between z = 0 and z = 2.24 A1: 0 = 0.5000 2.24 = 0.9875 0.9875 – 0.5000 = 0.4875 Q2:To the left of z = 1.09 A2: 0.8621 Q3: Between z = 1.15 and z
asked by looking for someone to varify my work please 
Math
Mary brought home 1/2 dozen eggs. He accidently dropped the carton on the flor and 1/3 of the eggs broke. How many eggs does she have left?
asked by Rene 
astronomy
Retrograde motion describes the backward motion of the stars relative to earth
asked by b 
chemistry AP
methyl red has the following color changes red 4.2 8.3 yellow a)write the ionic equilibrium equation b) If a small quantity of methyl red is placed in a solution with a pH of 4.5 . calculate the approximate value of [In]/[HIn]. What colour would be
asked by maya 
chm152
Consider the equilibrium of water with gaseous hydrogen and oxygen: Give the value of for this reaction, if it is written as: Choose one answer. a. 7.8 x 10^16 b. 3.9 x 10^16 c. 1.3 x 10^15 d. 6.4 x 10^14 e. 3.6 x 10^2
asked by ami 
Algebra 1A
1.You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within
asked by Anonymous 
physics
Are fat fish more likely to have broad stripes than thin fish? 7. Answers: Yes No 8. Reasons: Some fat fish have broad stripes and some have narrow stripes. 3/7 of the fat fish have broad stripes. 12/28 are broad striped and 16/28 are narrow striped. 3/7
asked by Gina 
Physics
Hey I'm lost on this physics problem can anyone tell me which equations i'm suppose to use in these questions a) A skier inhales a breath of air at Tempair = 3.9 ¢XC and exhales it as Volumeair = 1.92 liters of air at Tempbody = 37 ¢XC and atmospheric
asked by Andrew 
math
6x4y=20 and 4y6x=20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions
asked by KiKi 
Chemistry
Predict the products and write a net ionic reaction for the reaction of cadmium chloride and ammonium sulfide.
asked by Mary 
Math
Solve 9(w2)=18 9w18=18 9w=0 w=0 Is this correct?
asked by KiKi 
plz help=math
Early last year, the Zoe Growth Fund ran advertisements in the financial pages of major newspapers. The "ad" had primarily empty space containing the simple message: $20,000 INVESTED IN ZOEINVESTMENT GROWTH FUND IN 1962 WOULD BE WORTH $9.40 MILLION TODAY
asked by Amy 
physics
The diffusion coefficient for calcium ions crossing a biological membrane 10nm thick is 300 micrometers squared/second and the concentration difference of calcium ions across the membrane is 400 mol/m^2 (Molar mass of calcium is 40 kg/mol) Determine the
asked by Kelly 
7th grade
If a nickel contains 3.0 gram of copper and 1.2 gram of nickel How many kilograms of copper must be combines with 500 kilograms of nickel to make nickel coins?
asked by Anonymous 
PreCal(Please help)
Use synthetic division to show that x is a solution of the thirddegree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3  28x  48 = 0 Value of x = 4 Please help!!Thank you
asked by Abbey 
mathword problem
Media Services charge $20 for a phone and $30/month for its economy plan. The equation C=30t +20 describes the total cost, C of operating a media service phone for t months. The total cost for 10 months of service is... My answer is $320 for 10 months
asked by KiKi 
Math
use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this.
asked by Mark 
science
I have these pictures and i have to say which gestalt lawis illustrated, i know some of them are examples of figure/ground which is considered a principle but i don't know if principles are concidered laws(laws which includes similarity, continuity,
asked by Jon 
english
I am trying to do a definition paragraph and was wondering if this would be good on A FRIEND TO ALL topic. please help. A friend to all is essential in all friendships and is someone we can share our thoughts, feelings and gives us support. My opinion on a
asked by deborah 
solving polynomial equations
please help 3(n+1)=5(n3) thank you
asked by dan 
math
The equation y = 1777x+27153 can be used to predict the number y of gun deaths in the United States x years after 20000, that is, x=0 corresponds to 2000, x=3 corresponds to 2003, x=5 corrresponds to 2005 and so on. Predict the number of gun deaths in
asked by KiKi 
trig
(tanx+cotx)over(tanxcotx)=(1) over sin^2xcos^2x)
asked by stacey graham 
math
5x+2y=8 2x+5y=1 is this parallel, perpendicular or niether?
asked by KiKi 
chemistry AP
You have to design a buffer based on one of the systems below System 1: HA1 and A11 K= 4 E3 System 2: HA2 and A21 K= 5 E4 System 3: HA3 and A31 K= 6 E5 For the following parts assume that the buffer above in system2 has been constructed with [HA] =1M
asked by maya 
Accounting
At October 31, Nathan Company made an accrued expense adjusting entry of $1,400 for salaries. Prepare the reversing entry on November 1, and indicate the balances in Salaries Payable and Salaries Expense after posting the reversing entry.
asked by Julia 
physics
In the design of a passenger bus, it is proposed to derive the motive power from the energy stored in a flywheel. The flywheel, which has a moment of inertia of 4.0 x 10^2 kgm^2, is accelerated to its maximum rate of rotation 3.0 x 10^3 revolutions per
asked by Edwin 
Math
If a nickel contains 3.9 gram of copper and 1.2 gram of nickel How many kilograms of copper must be combines with 500 kilograms of nickel to make nickel coins?
asked by Heather 
soc 402
What are some of the major causes of illiteracy and how can they be avoided?
asked by meshelle 
Statistics
A gas station manager thinks the average motorist changes their oil less than the recommended two times per year. In a survey 15 car owners were asked how many times they changed their oil in the past year. Here are the results: 1 1 2 1 2 2 0 1 0 1 2 3 1 3
asked by Hank 
paralegal
What are the similarities and differences of federal and state systems?
asked by Kelly 
math
solve the compound inequality 4>2x+3 or 12
asked by KiKi 
Physics
A small fish is inside a spherical bowl filled with water (n=1.33). The bowl has a diameter of 30cm and the fish is at a distance of 5cm from the surface that separates water and air (ignore the effects of the glass of the bowl). The image of the fish is
asked by mm 
Math
Swan Furnace Cleaners wants to add 0.50% to the effective rate of interest on its credit card. If it currently charges a nominal rate of 4.25% compounded semiannually, at what value should it set the new nominal rate? The answer for this question is
asked by Amy 
math
4,000,000[(300,000)+x] = 147,000
asked by gregory 
Math / Algebra
I would like to know if I got my answer right. I am supposed to find the LCM of 11(t5)and 55(t5). I thought that the answer was 11t55 but I am a little bit lost can you please help me. Thanks
asked by Learner 
Math
give the domain of the function and identify any vertical or horizontal asymptotes. g(x)= 1 / x3 + 1 My answer was x = o and y=3 but this was wrong. Please explain!!
asked by Hannah 
Math
Solve 5/2X + 1/4X = 5/4 +X
asked by KiKi 
science
How to find oxidation number on redox reactions
asked by Gena 
college
Bayside insurance offers two health plans. Under plan A, Giselle would have to pay the first $160 of her medical bills, plus 25% of the rest. Under plan B, Giselle would pay the first $200, but only 20% of the rest. For what amount of medical bills will
asked by Anonymous 
physics
Entropy of melting A block of a certain substance (m = 0.3 kg) sits in a cold room at its melting point 170 K. A lab demonstrator supplies heat at a rate of 200 W for 140 seconds by focusing light on the block to (just) completely melt the block. (a) What
asked by michael 
Math
Solve the equation: (3/p+2) = (8/p3) Can someone please show me how to do this? I have a whole page of these to do but I don't really know what to do. If I could just see one done, I'm sure I can figure the rest out. Thank you.
asked by Chad 
PHYSICS
A steam turbine operates between hot and cold reservoir temperatures of 538.0 ¢XC and 92.1 ¢XC, respectively. If heat is supplied at a rate of 238.0 MW, what maximum amount of power could the turbine deliver?
asked by melvin 
social studies
Rhetorical devices on a person idea or ideology
asked by Reshma Sreehari 
science
Exercise 2. Starting with a hypothetical population of 14,000 people and an even age distribution (1,000 in each age group from 15 to 6670 years), assume that the population initially has a total fertility rate of 2.0 and an average life span of 70
asked by sarah 
Chemistry
A sample of gas exerts a pressure of 5.12 atm. What is the pressure of this gas expressed in torr? (3 significant figures, n.nnEn)
asked by Monica 
mathsimplify
Simplify 9[15(4512)]=
asked by KiKi 
chemistry
The mercury cell is still sometimes used in industry to prepare chlorine, Cl2, and caustic soda, NaOH. (a)In the first stage of the process a solution of sodium chloride is electrolysed using a voltage of 4.00V. Chlorine gas is obtained at one of the
asked by Anonymous 
mathelimination
3x+4y=5 6x+8y=10
asked by KiKi 
math(advanced algebra&trigonometry)
find, to the nearest minute, the angle whose measure is 3.45 radians.
asked by Rony 
microeconomic
please show me how to calculate price elasticity of demand of $3.00 increase to $3.50
asked by susie quick 
Compound Interest
Swan Furnace Cleaners wants to add 0.50% to the effective rate of interest on its credit card. If it currently charges a nominal rate of 4.25% compounded semiannually, at what value should it set the new nominal rate? The answer for this question is
asked by Amy 
College Admission
I am currently outside USA. Now in Asia we follow the Cambridge igcse curriculum. If I move to USA can I still get into an Ivy League college?
asked by Amir 
Marketing
There are 1000 students in the University of A. A sample of 10 observations was obtained regarding the rating of the service quality of dining hall. Here is the sample: Observation Rating 1 5 2 6 3 7 4 3 5 8 6 5 7 6 8 3 9 4 10 7 calculate the confidence
asked by JL 
soc 402
In what ways is the health problem affected by the family, the economy, and the polity?
asked by meshelle 
math!
j=6.50% m=Daily(365) f(effective rate)=? f=(1+i)^n =(1+(.0650/365))^365 =1.0671528481 =0.067152848 =6.72% i know how to find the "f" but if its j=? m=Quarterly(4) f=3.25% how do i find the "j"???
asked by Amy 
PreCal
Express the function in the form f(x) = (xk)q(x) + r for the given value of k. f(x) = 15x^4 + 10x^3  6x^2 + 14 Value of k = 2/3 I do not understand what I am suppose to do!
asked by Abbey 
science
What is the definition of Gestalt theory, and whats the main facts about it?
asked by Jon 
math!
Swan Furnace Cleaners wants to add 0.50% to the effective rate of interest on its credit card. If it currently charges a nominal rate of 4.25% compounded semiannually, at what value should it set the new nominal rate? The answer for this question is
asked by Amy 
Equation
E=mc2 involves the conversion of matter into energy during the thermonuclear process in the center of stars The equal sign indicates the energy and light are equivalent Is this correct or not?
asked by b 
algebra
E = ic sq, solve for c
asked by Terri 
algebra
give exact and approximate solutions to three decimal places (x5)sq = 18
asked by Jerry 
business
Complete the table below for both the United Nations and World Trade Organization by providing a description of the Purpose, Major Functions, and Current Members for each organization.
asked by Anonymous 
mathmultiplying
3/1 * (6/5) = 3 and 3/5 is this the correct answer?
asked by KiKi 
Math
What is the midrange of {6,7,8,9,10,12,15,15,20,28}
asked by Hannah 
math
Solve for the indicated letter c=9d, for d I am not sure I understand this question can someone help
asked by KiKi 
Math(Please help)
use the given information to solve the triangle. C= 85 degrees 20' a = 35 c = 50 I know that I have to find A,B,b but I do not know how to do this.
asked by Mark 
Spanish
Rita lleva al aeroporta y tambien lleva a Tomás. I don't understand what is meant by this sentence. Lleva means he or she carries, aeroporta means airport. Is Rita carrying something to the airport? How would I know this? How can she carry Tomás? Thanks!
asked by Jean 
English
How do you pronounce 'Eminem'? Is it a male name or a female name?
asked by rfvv 
statics
One force of 10k going NEtowards a point(A) at an angle of 40 degrees another force (F2) going SE from pt(a) at slope of 3,4,5 triangle and F1 horizontal going W towards pt (a) find F1 and F2 i was using force triangle but got off track wasn't able to get
asked by stacey graham 
letter format help
what is the format for an appeal letter for college disqualification.
asked by jen 
Microeconomics
Consider the market for taxi rides in a particular metropolitan area. a) Suppose that, when the price per mile increases by 40%, total miles demanded falls by 30%. Solve for the price elasticity of demand. b) Is the demand for taxi rides elastic or
asked by Kelis 
Microeconomics
Consider Good E, which, when sold in a particular country, has an equilibrium price = $10.00. The government of that country decided that it doesn’t like that equilibrium price, and so passes a law which prevents the product from selling for $10.00.
asked by Lacy 
Environmental Sci 275
· Post your response to the following: Reflect on your own worldview and compare it with the worldviews presented in the text. Provide examples of the benefits of your view to defend your position.
asked by Kay 
Psychology
Which color arrangement wouldcreate the deepest senseof space? A. red,orange,blue B. Green violet, blue C.Yellow, orange,yelloworange D. Violet, blueviolet, redviolet What are the double split complement colors for bluegreen?
asked by Jake 
business
Explain how these parts of your organizations function, including the virtual communications equipment you use, the types of events—teleconferences, training, routine testing, and so forth–that are carried out via virtual communications and what works
asked by mesha 
HSM240
I need an opinion please. My assignment says write 1,750 to 2,100word proposal paper on a social program that you create. Pretend that you have the power and capacity to create an agency or organization and decide to create a new social program. Can you
asked by Kim 
English
Hi, i would like to ask How was Gatsby killed? He was floating in the swimming pool and George Wilson shot him but where
asked by Ameena 
3rd grade
if you have a math problem that says which model correctly shows 2/3 of 12 circled? what does it look like?
asked by Anonymous 
Algebra
5(r9)+3>6(r+3)26 {r/r_____ ______
asked by Liz 
microeconomic
how to calculate price elasticity of demand of $3.00 to a increase to $3.50 and explain your reasoning and interpret the results
asked by susie quick 
U.S. History
What was the human hisory between North American Asia Eurasia and Europe before the 1450's?
asked by Jamal 
math(advanced algebra&trigonometry)
A circle has a radius of 4 inches. In inches, what is the length of the arc intercepted by a central angle of 2 radians? which of the following is the answer: 1) 2 radian 2) 2 3) 8 radian 4) 8
asked by Rony 
social studies
what sre the landforms, climate, and vegetation of the baltic coast?
asked by terry 
ORGANIC CHEMISTRY
Why do geminal protons that are adjacent to a stereogenic center give rise to two separate signals?
asked by CAMCAM 
Statistics
Does setting alpha at .01, rather than at .05, increase or decrease the likelihood of rejecting Ho?
asked by KLM 
Chemistry
How does the molar mass of molecules affect the boiling points? e.g MOlar masses HI>127.9 HF>20.07 HCl> 36.45 Boling points HI>35.55 HF> 20 HCl>114.17 can it be said that except for HF molecule, as molar mass increases the boling points
asked by LALA 
math
50% of what number is 35 would the answer be .50N=35?
asked by KiKi 
physics
A steam turbine operates between hot and cold reservoir temperatures of 538 degrees celcius and 92.1 degrees celcius respectively. If heat is supplied at a rate of 238 MW, what maximum amount of power could the turbine deliver?
asked by Mark 
Chemistry
Are the intermolecular forces that are acting ont the molecule HF as follows: dipoledipole, ionic and hydrogen bond
asked by LALA 
math
Figure the mean, median and standard deviation for the number of words learned by seven infants. I beleive the mean is 45.5 and the median is 10.The numbers are 10,12,8,0,3,40,and 18.
asked by Tammy 
astronomy
Explain the cause of the Earths' season. I need a diagram for my explanation
asked by b 
probability
what is the chance of getting the same number twice in a row, if there are 1000 numbers to draw from. what is the formula for this?
asked by steve 
science
When astronauts travel into space, they can still see Earth and the moon. why is this possible? A. The sun shines in the windows of their space vehicle. B. They view earth and moon through a telescope. C. The sun's light reflects off earth and the moon. D.
asked by Anonymous 
trig
find the exact value given that cosA=(1/3) in quad I, sin B=(1/2) in quad 4, and sin C=(1/4) in quad 2 tan(B+C) ? At the end of my equation I had (sqrt45/15) over (1sqrt15/15) , how do I rationalize or did I make an error in calculation
asked by stacey graham 
Astronomy
The precession of the Earth its causes, and its ramifications
asked by b 
Physics
An ideal gas is squeezed slowly from state A (pressure600 kPa, volume 1 L) to B ( pressure400kPa, volume 0.5 L). What is the work done or received by the gas?
asked by Chris 
Math
Can someone help me solve 0.7x+7
asked by KiKi 
Astronomy
Does the = sign in the equation E=mc2 mean that energy and light are equivalent
asked by b