Questions Asked on
November 20, 2010

Chemistry
The retina of a human eye can detect light when radiant energy incident on it is at least 4.0x10^(17)J. For light of 535nm (5.35x10^(7) m) wavelength, how many PHOTONS does this energy correspond to?
asked by Anonymous 
8th grade math
there are 3500 species of bees and more than 600,00 species of insects. how many insects are bees. write an inequlity.
asked by Anonymous 
graphing linear equatios
I am really confused...can someone help me with this? I am supposed to graph solution of given system of linear inequality: y is greater than 4x3 y is less than or equal to x+2
asked by Lynne 
chemistry
A 47.7g sample of SrCl2 is dissolved in 112.5 mL of solution. Calculate the molarity of this solution.
asked by Jessica 
Chemistry
If you mix 40.0 mL of a 0.389 M solution of K2CrO4 with 40.0 mL of a 0.389 M solution of AgNO3, what mass of solid forms?
asked by Angela 
chemistry
how to balance chemical equations
asked by Linda 
Chemistry
Suppose that a 10mL sample of a solution is to be tested for Cl ion by addition of 1 drop (0.2mL ) of 0.15 M AgNO3 . What is the minimum number of grams of Cl that must be present in order for AgCl(s) to form?
asked by Josh 
Chemistry
Calculate the pH at the equivalence point in titrating a 0.120 M solution of NaHCrO4 (sodium hydrogen chromate) with 7.0×10−2 NaOH.
asked by Josh 
algebra
During the first part of a rip a canoeist travels 43 miles at a certain speed. The canoeist ravels 19 miles on the seond part of the trip at a speed 5 mph slower. The total time for the rip is 2 hours. What is the speed on each part of the trip?
asked by Kim 
English
There is a host of reasons... or There are a host of reasons.... Which is correct?
asked by Ann 
algebra
how can 2 boys weighing 100lbs each and a man weighing 200lbs cross the river in a boat that only holds 200lbs safely?
asked by d 
English
The packet of biscuits has passed its expiry date or The packet of biscuits has past its expiry date. Or both sentences correct?
asked by Ann 
Chemistry
Which has the higher [H+], 0.40 M RbOH or 0.20 M Ca(OH)2?
asked by Jane 
physics
In 8.6 s a fisherman winds 2.7 m of fishing line onto a reel whose radius is 3.0 cm (assumed to be constant as an approximation). The line is being reeled in at a constant speed. Determine the angular speed of the reel.
asked by mackenzie 
chemistry
why is dilute nitric acid not used in manufacture of hydrogen sulphide instead of dilute sulphuric acid?
asked by sanjeet 
trig
graphs of trignometry
asked by zainab 
English
1. A cow can make about 12kg of waste in a day. ( Is a cow a female? Can a cow mean both male and female ones? What about in this sentence?)
asked by rfvv 
physics
A heavy ball A of mass 10kg is moving at a velocity of 10m/s to the right. When it hits a stationary ball B of mass 5kg, ball B moves at a velocity of 10m/s to the right. a) explain whether it is inelastic collision or not.
asked by Anonymous 
physics
Q 2) A particle executes simple harmonic motion with an amplitude of 10 cm. At what distance from the mean position are the kinetic and potential energies equal ?
asked by Pronab 
ICD classification reimbursement
what are the four main steps that should be followed to make sure that the code is an accurate description of the diagnosis
asked by marisha 
physics
Consider a simple haemonic motion of time period T . Calculate the time taken for the displacement to change value from half the amplitude to the amplitude.
asked by Pronab 
Earth Science
What are the sequences of weather events a city goes through when an idealized, middle latitude,mature cyclone that hasn't developed an occluded front passes over it. Assume the center of the wave cyclone passes, west to east, at 150 to the north of the
asked by Frick 
physics
In a panic stop, a 109 ton train can slow down with an acceleration of 0.08 g's. What is the time required to stop a train from a speed of 53 mph?
asked by sandhu 
fin571
B1. (Choosing financial targets) Bixton Company’s new chief financial officer is evaluating Bixton’s capital structure. She is concerned that the firm might be underleveraged, even though the firm has largerthanaverage research and development and
asked by Anonymous 
Physical Science
force of a toy jeep if the mass=50kg & is traveling at 4m/s& the radius is 50 centimeters.
asked by Val 
Physical science
determine the velocity of a toy jeep if it has a distance of 80 meters and a time of 8 seconds?
asked by Val 
Physical science
Acceleration is F/S A=F/M this is: direct inverse not sure both direct &inverse
asked by Val 
physical science
change 85 kilograms to grams change 45 meters to centimeters change 70 nanometers to meters
asked by Val 
statistics
Machines are used to pack sugar into packets supposedly containing 1.20 kg each. On testing a large number of packets over a long period of time, it was found that the mean weight of the packets was 1.24 kg and the standard deviation was 0.04 Kg. A
asked by srinu 
math
solve the simultaneous equation 2x+2y=7 x^24y^2=8
asked by fardeen 
Computer Programing & Logic Design
Submit pseudocode and a flowchart for the following programming exercise: Test Average and Grade Write a program that asks the user to enter five test scores. The program should display a letter grade for each score and the average test score. Design the
asked by Anonymous 
Computer Programing & Logic Design
Submit pseudocode and a flowchart for the following programming exercise: Largest and Smallest Design a program with a loop that lets the user enter a series of numbers. Theuser should enter 99 to signal the end of the series. After all the numbers have
asked by Anonymous 
physics
Years ago, a block of ice with a mass of about 22kg was used daily in a home icebox. The temperature of the ice was 0.0 degrees Celsius when delivered. As it melted, how much heat did a block of ice that size absorb? The latent heat of fusion of water is
asked by Norah 
physics
An unclothed student is in a 27 degree Celsius room. If the skin temperature of the student is 37 degree Celsius, how much heat is lost from his body in 18 minutes, assuming that the emissivity of the skin is 0.91 and the surface area of the student is 1.7
asked by Ashleigh 
physics
two charges +1.2*10^8 C and 1.6*10^8 C are placed at the corners A and B of a right angled triangle ABC in which AB=3cm, AC=5cm. find the electric field at C.
asked by sanjeet 
english
I wrote this for my class and I just want to make sure I have it right. The role of education plays a very big part in the financial world. It's a big part of becoming successful. It can help with learning basic math skills in order to better your
asked by stacey 
English
Can some one proof read my short essay for gramatical errors, or just the anything in general. heres the question i am answering: Popular media from magazines to movies to television offer images, stories, and information that influence our prejudices and
asked by Sara 
Chemistry
Calculate the pH at the equivalence point in titrating a 0.120 M solution of NaHCrO4 (sodium hydrogen chromate) with 7.0×10−2 NaOH. Please help!
asked by Josh 
Chemistry
Suppose that a 10mL sample of a solution is to be tested for Cl ion by addition of 1 drop (0.2mL ) of 0.15 M AgNO3 . What is the minimum number of grams of Cl that must be present in order for AgCl(s) to form?
asked by Josh 
Macroeconomics
You want to start a company, and are trying to decide between two different industries. You are doing your final research before you write your business plan. Industry A has 20 firms and a Concentration Ratio (CR) of 20% * What is the name for this type of
asked by Need Help 
US History
Evaluate the administrations of Presidents Hayes, Garfield, Arthur, Cleveland, and Harrison in reference to their conceptions of the office and the use of executive power.
asked by jessica 
chemistry
What can we use to put out a fire that involves sodium or any alkali metals. I know we can't use water as sodium reacts violently with water, then what else can we use?
asked by Javal 
7th grade
Hi I know this isn't on the subjects or anything but how do I improve my grades in geography class
asked by jesse 
chemistry
What are the partial pressures for all gases in 4NH3+O2>4NO+6H2O that remained at the end, if the reaction took place in a sealed 50.0L tank and the final temperature is 345K?
asked by anne 
7th grade
is there a way i can be one step ahead of my teachers so im never behind
asked by the hat is back 
7th grade math
how do i subtract intergers
asked by oh noes he didnt 
Health ins
Course project,to research a healthcare facility How do i write a Outline
asked by Kristina 
college
I need to write a net ionic equation for Sr{2+}+ Hg2 + NaCL =
asked by Susan 
sociology
How can the three sociological perspectives (e.g., social functionalism, social conflict, and symbolic interaction) be used to conceptually understand social deviance?
asked by me 
CHEM
a 3 liter flask at 25 C is filled with a mixture of N2 AND O2 to a total pressure of 8 atm, there were 10 grams of N2. How many grams o2 were present?
asked by MAX 
algebra
5y/12y3/6=2y1/2
asked by Beverly 
Math
I posted these 2 questions a couple of days ago and although the help I received would have been more appreciated if it didn't come with an underhanded comment, I did see where I made my mistake with the first question, however I would like to know with
asked by Dania 
physics
Three vectors, A, B, C have the following x and y components: Ax = 6.7, Ay= 2.3; Bx = 5.5, By = 4.5; Cx = 3.2, Cy = 7.2. What is the magnitude of A + B + C ?
asked by Isabell 
chem
is An antacid neutralizes stomach acid. a chemical reaction?
asked by hannah 
Math
The side length,s, of a cube is related to its volume, v, by the formula s=v^1/3. A cube box when filled with materials has a volume of 729 cm2. What is the side lenth of the cube box used? Please help me step by step with this. I don't know where to start
asked by Andre 
physics
A cup of coffee (with lid) is enclosed in an insulated cup 0.5 cm thick in the shape of a cube 9.7 cm on a side. The thermal conductivity of the cup is 0.0002 cal/s x cm x C. The temperature of the coffee is 71 degrees Celsius and the temperature of the
asked by Isabell 
college chemistry
I need to understand how to make a net ionic equation using the following elements: Sr++, Hg2, NaCl Or these: NH4, Ca++, K2SO4 I was not given the products of the reactions.
asked by Susan 
improving grades
1. Never impersonate a teacher, steal ideas, nor plagiarize, nor copy others homework/tests. 2. Change your habits. This hard to do. Study, notetaking, and work habits are nearly always the problem. You have to change, be more efficient, and learn to
asked by bobpursley 
Math
Not clear about this, please help me understand the steps: (5b^2c^1/4)^3
asked by Dexter 
chemistry
What is the pH of an aqueous solution at 25°C in which [H+] is 0.025 M?
asked by richy 
comp
what is the verb tense in this sentence? Education is contributing a good role of successful financial planning.
asked by richard 
Science
What salts are there within potato cells and what percentage of salts are there in them?
asked by Rrezarta 
CHEM
a cyinder with a volume of 5.37 liters contains N2 at a pressure of 2.82 atm at 26 celcius. how many grams Ne must be added to raise the total pressure to 7.5 atm
asked by MAX 
Literature/short story,2
An author's purposein using rhetoric is to?
asked by Anonymous 
physics
Spring scale A is attached to the floor and a rope runs vertically upward, loops over the pulley, and runs down on the other side to a 99 N weight as shown (in original problem). Scale B is attached to the ceiling and the pulley is hung below it. What are
asked by anonymous 
chemistry
calculate the molarity of each of the following solutions. Help!! (a) 0.36 mol of LiNO3 L of solution (b) 70.7 g C2H6O in 2.25 L of solution (c) 11.56 mg KI in 114.2 mL of solution
asked by Stacy 
chemistry
A chemist wants to make 5.5 L of a 0.250 M CaCl2 solution, what mass of CaCl2 (in g) should the chemist use?
asked by Lisa 
College Algebra
Problem: In certain signal detection problems (e.g. radar or sonar) the probability of false alarm (FA) (i.e., of saying that a certain signal is present in the data when it actually is not) is given by: ∞ pFA = ∫ _______1_______ x^p/21 ex/2 dx η
asked by Anonymous 
Spanish
27. No es mi carpeta. La carpeta es _________ Susana. a. con b. en c. de d. mas o menos C 28. Yo tengo quince años. Mi hermana es mayor. Ella _________. a. tiene veinte años b. tiene catorce años c. es profesora también d. tiene amigos que son
asked by mysterychicken 
physics
50.0 kg stoplight hangs from wire over middle of an intersection. wire makes 15 degree angle with horizontal. find tension in each end of the wire
asked by vic 
physics
How hard would you have to push a snow shovel over the sidewalk if you wanted to maintain a constant velocity if the shovel had a mass of 12 kg and the coefficient of friction between the sidewalk and the shovel was 0.33?
asked by anonymous 
Math pplication of Sin and Cos&thier derivative
An oceanographer measured a set of sea waves during a storm and modelled the vertical displacement of waves in meters using the equation h(t)=0.6cos2t+0.8sint, where t is the time in seconds. a) Determine the vertical displacement of the wave when the
asked by Farah 
physics
Find the acceleration down the ramp: skateboarder starts from rest at the top of a 12.5 m slick ramp that makes a 25 degree angle with the horizontal. (coefficient of rolling friction is negligible). Combined mass of skateboarder and skateboard = 75 kg.
asked by chelsie 
chemistry
This question has three paarts: 1. Determine the mass of water formed when 14.5L NH3 (at 298K and 1.5 atm) is reacted with 19.3 L of O2 (at 321K and 1.2 atm) 4NH3+O2>4NO+6H2O I got the answer of 19 g H2O 2.What are the partial pressures for all gases
asked by anne 
6th grade Math
If 7 out of 11 ballons are red, what fraction of ballons are not red?
asked by Sarina 
9th grade
if 478 watts of power are used in 14 seconds, how much work was done?
asked by michelly 
physics
how long does it take to do 432 joules of work with 75 watts of power?
asked by michelly 
math
Slope the Intercept form of the Equation....yy1=m(xx1) (3,2) m=6/5 (8,8)
asked by monica 
College Chemistry
How many milliliters of 1.55 M NaOH must be added to 125 mL of .19 M NaH2PO4 to make a buffer solution with a pH of 6.90? I have attempted to solve this with no success, as this is an online homework assignment that requires an exact answer. Hoping that
asked by Elizabeth 
Chemistry
Why, in terms of atomic structure, is the radius of an Na atom larger than the radius of an Na+ ion?
asked by danny123 
chemistry
If 4.0 L of a 4.9 M SrCl2 solution is diluted to 40 L, what is the molarity of the diluted solution?
asked by Lisa 
chemisty
what is the molarity of ZnCl2 that forms when 30.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL. Zn(s) + CuCl2(aq)> ZnCl2(aq) + Cu(s)
asked by melissa 
analytical chemistry
How much ammonium sulfate should be added to 500mL of .30M ammonia to make a buffer with a pH 9.0?
asked by joey 
ethics
Where would you find a "normative" organizational culture?
asked by Anonymous 
college chemistry
Which of the following would make the best buffer solution and explain. HF and NaF or NaC2H3O2 and CH3COOH
asked by Mic 
Financial Math
Initial deposit of $1100.00 on June 1. APR of 2.0%. What is the amount of interest earned on December 31? What is new balance?
asked by Jerome 
physics
Two fan carts with different fan speeds and different accelerations are started from rest some distance from one another. Cart A begins at position 0 with a velocity of zero and an acceleration of aA to the right. Cart B begins at position xB with a
asked by Punita 
Biology
What is the targeting pathway from translation until the protein reaches it's final functional destination for PFK and insulin? Choose from the following choices for each: a) golgi > ER > outside of cell b) ER > golgi > cytoplasm c) cytoplasm only d)
asked by Katy 
finance
Firm L has debt with a market value of $200,000 and a yield of 9%. The firm's equity has a market value of $300,000, its earnings are growing at a 5% rate, and its tax rate is 40%. A similar firm with no debt has a cost of equity of 12%. Under the MM
asked by Anonymous 
Algebra 2/Math
Can you check these thanks. Solve the system by substitution or elimination. 2x+y=1 3xy=14 Answer: (3,5) x3y= 12 2x + 11y= 7 Answer: (39,17) 4x+2y=8 12x+6y=24 Answer: no solution 4x2y=5 2xy= 1 Answer: no solution 4a+3b =6 8ab= 9 Answer: no
asked by Karen 
Chemistry
A quantity N2 of occupies a volume of 1.4L at 290K and 1.5atm . The gas expands to a volume of 3.1 L as the result of a change in both temperature and pressure. I have the find the density of the gas at these new conditions?
asked by Kate 
physics
A rocket of mass 4.50 105 kg is in flight. its thrust is directed at an angle of 64.0° above the horizontal and has a magnitude of 7.50 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the
asked by megan 
Chem
A scuba diver creates a spherical bubble with a radius of 4.0 at a depth of 30.0 where the total pressure (including atmospheric pressure) is 4.00 . What is the radius of the bubble when it reaches the surface of the water? (Assume atmospheric pressure to
asked by Jess 
ESL
How is the ELL Proficiency Standards similar as well as different to the Arizona Language Arts Academic Standards?
asked by Laura 
Physics
Trying to beat the heat of summer, a physics grad student went to the local toy store and purchased a child's plastic swimming pool. Upon returning home, he filled it with 154 liters of water at 25°C. Realizing that the water would probably not be cool
asked by BG 
physics
if 478 watts of power are used in 14 seconds, how much work was done?
asked by michelle quendarsv 
geometry
in triangle PQR ~  ~  if m
asked by crystal 
Spanish
38. "_______" "Ramon, Esteban y Teodora." a. ¿Cómo son? b. ¿Cómo se llama? c. ¿Cómo te llamas? d. ¿Cómo se llaman? D? 39. Mi perro es guapo; _____ ojos son negros. a. sus b. tiene c. su d. mis A 40. La amiga de mi abuela tiene ____ años. a.
asked by mysterychicken 
Chemistry
A scuba diver creates a spherical bubble with a radius of 4.0cm at a depth of 30.0m where the total pressure (including atmospheric pressure) is 4.00 atm. What is the radius of the bubble when it reaches the surface of the water? (Assume atmospheric
asked by Jess 
physics
if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step by step help please? asap. thanks, michelle .
asked by michelle quendarsv 
geometry
in triangle PQR,line segment PQ is = and congruent to line segment QR. if m
asked by crystal 
ALgebra word problem
a coffee shop sells a cup of espresso for $2.00 and a cup of cappuccino for 2.50. on friday, rachel sold 30 more cups of cappuccino than espresso, and she sold $178.50 worth of espresso and cappuccino together. how many cups of each were sold?
asked by mike 
math
Hi  please help me with this one: (5b^2c^1/4)^3 is the answer: 125b^6 3c ^ 3/4
asked by Dexter 
physics
Two fan carts with different fan speeds and different accelerations are started from rest some distance from one another. Cart A begins at position 0 with a velocity of zero and an acceleration of aA to the right. Cart B begins at position xB with a
asked by Punita 
physics
The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a constant speed of 15m/s . 1)If the tension in the tow rope is 90.0 , how much work does the rope do on the skier in 30.0 ? 2)How
asked by JC 
college physics helpasap
The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a constant speed of 15m/s . 1)If the tension in the tow rope is 90.0N, how much work does the rope do on the skier in 30.0s ? 2)How
asked by JU 
Math
[w^1 / w^3] = w3 ? is this correct?
asked by Joshua 
Math
4x^3y^2 / 2x^1y^4 is the answer: 2x^4y^6 ?
asked by Tia 
Math
A colony of bacteria increases according to the law of unihabited growth. a) If the number of bacteria doubles in 5 hours, find the function that gives the number of cells in the culture. I have the answer to this one. It is N=No e ln2/5 (t) b) If there
asked by Hannah 
Math
A bone is found to have 45% of the original amount of carbon 14. If the half life of carbon is 5600 years, how old is the bone. Would I use the formula N=No e^kt?
asked by Hannah 
VB 2008 Programming
HELP!!!! I'm not sure How to get started nor the steps to design this project. The file MEMBERS.TXT contains the names of the 100 members of a club. Write a program to randomly select people to serve as President, Treasurer, and Secretary. Note: A person
asked by Lee 
US history multiple choice
1. Lydon Johnson's ultimate reaction to public opinion regarding the Vietnam War was to: A. run on his growing popularity. B. not seek reelection because he was so popular. C. admit an error and lower the number of troops in Vietnam. D. not seek reelection
asked by anthony 
physics
a dog sits 1.34m from the center of a merrygo round with an angular speed of 1.26rad/s. if the magnitude of the force that maintains the dog's circular motion is 43.8N, what is the dog's mass? answer in units of kg?
asked by vanessa 
Physics/chem
Trying to beat the heat of summer, a physics grad student went to the local toy store and purchased a child's plastic swimming pool. Upon returning home, he filled it with 154 liters of water at 25°C. Realizing that the water would probably not be cool
asked by BG 
English
Discuss how you see the theme of creating art developing in stories and poems.
asked by vickie johnson 
physics
Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step by step help please? asap. thanks, michelle . physics  bobpursley,
asked by michelle quendarsv 
chemistry
The magnesium ion has an electron configuration like that of which noble gas?
asked by Rayniya 
PHYSICS
A 0.49 kg object is attached to a spring with a spring constant 167 N/m so that the object is allowed to move on a horizontal frictionless surface. The object is released from rest when the spring is compressed 0.12 m. Find the force on the object.
asked by KIM 
PHYSICS
A 0.181 kg mass is attached to a spring and executes simple harmonic motion with a period of 0.21 s. The total energy of the system is 1.2 J. Find the force constant of the spring. b) Find the amplitude of the motion.
asked by JACK 
physics
A 95.5 g mass is attached to a horizontal spring with a spring constant of 11.2 N/m and released from rest with an amplitude of 35.8 cm. What is the velocity of the mass when it is halfway to the equilibrium position if the surface is frictionless? Answer
asked by raerae 
Math
[w^1 / w^3]^4 = w3 ? is this correct?
asked by Joshua 
HSM220
How do I concider the 1000 students in my matrix budget?
asked by pam 
Thanks on thanksgiving
With all the help you did for me i want to give a treat. here are some thanksgiving poems I found. Thank You For Inviting Us Thank you for inviting us To your Thanksgiving dinner. A day spent in your company Is invariably a winner. Thank you for the time
asked by Erin 
Finance
Kilsheimer Company just paid a dividend of $ 4 per share. Future dividends are expected to grow at a constant rate of 6% per year. What is the value of the stock if the required return is 12 %?
asked by rb 
I don't know what Subject!!
Why do we celebrate Thanksgiving Day?
asked by Erin 
Algebra
5x+2y=11, 7x3y=13, find x and y
asked by Sandra 
math
[w^1 / w^3]^4 = w3 ? is this correct?
asked by Joshua 
Grade 10 Math
Could you please help me with this question: A diver dives from the 3 m board at a swimming pool. Her height, y, in metres, above the water in terms of her horizontal distance, x, in metres, from the end of the board is given by y= x2 + 2x + 3. What is
asked by Gianluca 
Math
Hi Sorry I'm reposting this question, I think the answer that was provided was not correct because of the ambiguity of the original question but if I could have someone workout the question as written it would be much appreciated: See below discussion.
asked by Tia 
chem class
What is the pH of an aqueous solution at 25° that contains 3.98 × 109 M hydronium ion?
asked by jessie 
physics
Two fan carts with different fan speeds and different accelerations are started from rest some distance from one another. Cart A begins at position 0 with a velocity of zero and an acceleration of aA to the right. Cart B begins at position xB with a
asked by Punita 
Math
estimate a 15% tip on a $42.65 check
asked by Marissa 
math
An artisan can sell 120 garden ornaments per week at $4 per ornament. For each $0.50 decrease in price, he can sell 20 more ornaments. a) determine algebraic expressions for the price of a garden ornament and the number of ornaments sold. b) write an
asked by Gianluca 
physics
Posted by michelle quendarsv on Saturday, November 20, 2010 at 5:26pm. Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step
asked by michelle quendarsv 
PHYSICS
Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being
asked by JJ 
Statistics
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24hour cycle of sleeping and waking¡ªeven if they are not exposed to the usual pattern
asked by student 
Statistics
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24hour cycle of sleeping and waking¡ªeven if they are not exposed to the usual pattern
asked by student 
Chemistry
What is the only positive ion found in H2SO4(aq)? a. ammonium ion b. hydronium ion c. hydroxide ion d. sulfate ion The answer's b, but I don't understand why.
asked by danny123 
social studies
How do elections in a singlemember district differ from elections in states that fill their seats atlarge?
asked by confused 
Early childhood
1.withdrawing or withholding reinforcement 2.incompatible behaviors 3.catch the child being good 4.reminder,redirection,reprimands could someone give me example of how this relates to the developmentalbehavioral approach
asked by anonymous 
CHEMISTRY
what is the volume of oxygen gas at stp from decompostion of 10.8 meruric oxide
asked by BEST 
Chemistry
At STP, a 7.49gram sample of an element has a volume of 1.65 cubic centimeters. The sample is most likely (1) Ta (3) Te (2) Tc (4) Ti How do you get the answer?
asked by danny123 
ENGLISH
Did I use the word sublimate correctly in the following sentence? "His stories served as a way to sublimate his anger for his childhood and improve the conditions for nineteenthcentury adolescence."
asked by KATIE 
chemistry
Determine the mass of water formed when 14.5L NH3 (at 298K and 1.5 atm) is reacted with 19.3 L of O2 (at 321K and 1.2 atm) 4NH3+O2>4NO+6H2O
asked by lorah hilpolep 
chemistry
Three gases (8.00 of methane, 18.0 of ethane, and an unknown amount of propane, were added to the same 10.0L container. At 23.0 C , the total pressure in the container is 3.60 atm. Calculate the partial pressure of each gas in the container.
asked by Jamie 
physics
A football on the moon (1/6 earth's gravity) is kicked straight up with an initial velocity of +14.5 m/s. If it starts 2.7 m above the surface, how much time has passed until it is 16.8 m above the surface and on its way down?
asked by sandhu 
Physics
if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step by step help please? asap. thanks, michelle . physics  bobpursley, Saturday, November 20, 2010 at 4:06pm power= work/time=
asked by michelle quendarsv 
Chemistry
The molar solubility of lead iodide is 1.45*10^3M at 20 degrees C and 6.5*10^3M at 80 degrees C . What are the values of delta H not and delta S not for dissolution of PbI2 ? PbI2(s) > Pb2+(aq) + 2I (aq) You may assume that delta H and delta S are
asked by Tal 
Chemistry
When a vehicle is parked in the sunlight on a hot summer day, the temperature inside can approach 55 deg C. one company has patented a nonCFC propelled aerosol that can be sprayed inside a vehicle to reduce the temperature to 25 deg C within seconds. the
asked by Rayana 
geography
What is the significance of this and what are the consquences. I don't understand the world of economics. Maybe a little help to get started. Thank you. Canacol Energy, an oil firm listed in Toronto and Bogota has a goal to increase its output to 35,000
asked by Sarah 
health management
As a healthcare manger what two strategies would you consider to help build internal and external relationships that could benefit your organization?
asked by Mary 
Physics
if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step by step help please? asap. thanks, michelle . physics  bobpursley, Saturday, November 20, 2010 at 4:06pm power= work/time=
asked by michelle quendarsv 
Spanish 1
46. Mañana voy al parque con _________ abuelos. a. ochenta años b. mi c. mí d. mis B 47. "¿Quién está es casa?" "No hay _______." a. gemelos b. cuántos c. nadie d. personas pelirrojas Not sure... 48. As in the United States, hyphenated surnames are
asked by mysterychicken 
West virginia mining accident.. can someone help
What does orgaizational leadership have to do with the WV mining accident?
asked by bobbi 
trig
In ΔXYZ, ∠X=47° and ∠Y=29°. ∠XWZ=90° and XY=3.9. Find the length of WY to the nearest 100th.
asked by calous 
ALGEBRA
I need to find a slope and y intercept of the line and write the fractional answers in lowest terms. 2y+8x+3=12+8x; I would like to try this one and get your input. 2y+8x8x123; 2y/2 = 9/2; y = 9/2 however I did not find the slope. I don't think there is
asked by CANDY 
health,safety and nutrition
Why health, safety and nutrition strategies are important ti identify and practice in an early childhood education programs.
asked by Ann 
algebra
How can I find the equation in standard form using only integers for the line through (1,3) and (2,1)?
asked by Lady T. 
Composition and Communication I
write a one paragraph analysis of about 150 words, in which you do the following: oIdentify which of the two selected paragraphs was more effective, focusing on the writing elements rather than the opinions presented. oAnalyze why one paragraph was more
asked by Anonymous 
English 12
Okay, for English 12 im doing a semiar on Yann Martel's book, "Life of Pi" The topic of my essay is "martel depiction of Canada and India= the role of setting" My main body paragraphs are Setting in Canada Setting in India Setting in the Ocean what im
asked by Andy 
world geography
can anyone help me compile a list of facts about all the continients
asked by jesse 
Math
1.A job hotline service charges $25 plus a 4% commission c on the first month of earnings if it finds work for a client. Write an equation that represents the total cost T to find a job through the hotline. What is the cost if a client earns $1500 the
asked by Shadow 
Anatomy
Why is it helpful for our sense of smell to adapt rapidly?
asked by Harjot 
EDU310
What are the major issues that perpetuated the evolution of the American education system in the United States? How did they impact the changes that have taken place?
asked by Anonymous 
US history multiple choice
1. The staff of President Nixon: A. demonstrated how much the government had grown in the previous fifty years. B. was not as large as it should have been, but it allowed Nixon to exert as much control over each person as possible. C. was generally a group
asked by anthony 
chem class
What is the pH of an aqueous solution at 25°C in which [OH] is 0.025 M?
asked by jessie 
Early childhood
Sit and watch and timeout what are some example that relates to the developmentalbehavioral approach help.
asked by Theresa 
Cognitive psycology
o Define language and lexicon. o Evaluate the key features of language. o Describe the four levels of language structure and processing. o Analyze the role of language processing in cognitive psychology
asked by Anonymous 
Spanish
se viste ustede rápidamente o despacio? for this question would I answer in the present, imperfect, or preterite?
asked by Amy 
hcr220 college
I have done my cms 1500 form but I want to make sure that I did it correctly. Here it goes: i tried to post it but it will not allow
asked by kristina 
history
1. Nixon's policy regarding Vietnam was: a. very popular. b. becoming very unpopular, particularly among Senators. c. becoming increasingly unpopular among ordinary voters, but the president and Congress generally ignored these concerns. I'm undecided
asked by sara 
french
I need a paragraph telling about myself but i need someone to check it for me. Bonjour mis amis. Je m'applle lisa. Je suis vingt ans. Mon couleur preferee est le bleu. Mon saison preferee est l'automne. Je suis drole, actif, et intelligent. J'ai un
asked by lis 
Math (Calc 1)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle (as shown in the figure below). (pictures of a pentagon) If the crosssectional area is A, determine the
asked by Craig 
chemistry
What is the rate of the following reaction (M/s) if the rate constant for the reaction is 0.500 L•mol1•s1 and the concentration of each reactant is 0.0628 M. (The units for the rate constant depend upon the rate law). CO + NO2 > CO2 + NO
asked by Confused 
Concentration and Reaction
The rate of the following reaction: Radioactive decay of 90Sr, is characterized by the rate constant k = 0.024 year1. What is the halflife (in years) for this reaction at the same conditions when the initial concentrations are 0.0356 M? (Round your
asked by Confused 
Reaction rates
The reaction, C2H5Br > C2H4 + HBr, has a rate constant k = 0.0000100 s1 at 363 °C and k = 0.000479 s1 at 427 °C. What is the rate constant for the reaction at 725 K? Round your answer to 3 significant figures.
asked by Confused 
Early childhood
#2 Discuss the following concepts and provide an example for each as it relates to th dvelopmentalbehavioral approach
asked by Theresa 
physics
A firetruck is traveling at a velocity of +20 m/s in the x direction. As the truck passes x=63m it shoots a tennis ball backwards with a speed of 20 m/s relative to the truck at an angle of 39° from a height of 1.4 m. Neglect air resistance. At what x
asked by sandhu 
Astronomy
The apparent brightness of a Cepheid variable star in a faraway galaxy is measured to be 640,000 times fainter compared to an equivalent star 2,000 light years away from the Sun in our Galaxy. Assuming that there is no light absorption between galaxies,
asked by Anonymous 
Early childhood
#3 Discuss the following concepts and provide an example for each as it relates to th dvelopmentalbehavioral approach when it comes to sit nd watch and timeout
asked by Theresa 
pomona
Can a hypothesis test yield a statistically significant (say p
asked by gianni 
chemistry
What products would you expect from acidcatalyzed hydration of the following alkenes? a. propene b. 2methylpropene
asked by Jada 
statistics
How is the pvalue of a hypothesis test related to type I and type II error?
asked by taylor 
Math
If Betsy leaves Town A traveling due east for 6 miles to Town B, then turns due north and travels 9 miles to Town C, how far will her trip home be to Town A as she travels directly southwest?
asked by Megan 
Math
If Betsy leaves Town A traveling due east for 6 miles to Town B, then turns due north and travels 9 miles to Town C, how far will her trip home be to Town A as she travels directly southwest?
asked by Megan 
chem
I got through the first part easily, got 352.9kJ Having trouble with the second part "The mealsreadytoeat (MREs) in the military can be heated on a flameless heater. The source of energy in the heater is shown below. Mg(s) + 2 H2O(l) Mg(OH)2(s) + H2(g)
asked by Anonymous 
organic chemistry
What is the major product when 2methyl1butene is treated with BrF. Explain your answer.
asked by Jada 
chemistry (combustion and heat)
How much heat is evolved when 5.00g of propane C3H8 burns completely. I got the formula down, now what? C3H8 + 5O2 > 3CO2 + 4H2O
asked by Anonymous 
physics
an antifreeze solution is made by mixing ethylene glycol (density= 1116 kg/m^3) with water. suppose that the specific gravity of such a solution is 1.0730. assuming that the total volume of the solution is the sum of its parts, determine the volume
asked by kai 
physics
Spending a long time in weightlessness is unhealthy. One of the most important negative effects experienced by astronauts is a loss of muscle and bone mass. Since an ordinary scale won’t work for an astronaut in orbit, what is a possible way of
asked by john 
statistics
i have a question regarding statistics. i just don't know how to do it and would really appreciate if someone could tell how i can solve it. the question is; a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11 a) there are 5x5=25 different
asked by ash