Questions Asked on
April 11, 2012

physics
a ball striking a horizontal plane with a velocity v rebounds with a velocity 256v/625 after 4th collision. the coefficient of restitution is?
asked by srikala 
chemistry
What would the final freezing point of water be if 3 mol of sugar were added to 1 kg of water (Kf = 1.86C/(mol/kg) for water and i = 1 for sugar)?
asked by james 
physics
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 104°C−1). At room temperature (20.0°C), the frames have circular lens holes 2.27 cm in radius. To what temperature must the frames be heated if lenses 2.28
asked by anthony 
physics
28. A 20N force applied to the handle of a door produces a 44N output force. What is the AMA of the handle? Show your work.
asked by Ms. Simpsonizer 
Chemistry lab
1) Using the 1st equivalence point from part a calculate the molarity of the phosphoric acid. Molarity of NaOH = .1523 M Volume of phosphoric acid used 10.0mL Volume at equivalence point 7.410 mL and 14.861 mL 2) Using the 2nd equivalence point from part
asked by Maura 
College physics
A 0.006 00kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00m wide door is free to swing on its frictionless hinges. At what
asked by johnny 
Accounting
Identify whether each description best applies to a periodic or a perpetual inventory system. a. Provides more timely information to managers. b. Requires an adjusting entry to record inventory shrinkage. c. Markedly increased in frequency and popularity
asked by Mar 
math
Suppose T varies directly as the 3/2 power of x. When x=16, T=160. Find T when x=4
asked by Anonymous 
physics
A 40g block of ice is cooled to −71°C and is then added to 590 g of water in an 80g copper calorimeter at a temperature of 27°C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts,
asked by anthony 
physics
If a simple machine provides an increased output force, what happens to the output distance? Can someone please help
asked by kevin 
PreAlgebra
Write a rule for the linear function in the table. x f(x) –4 16 0 0 4 –16 8 –32 A. f(x) = –4x B. f(x) = x + 16 C. f(x) = 4x D. f(x) = x
asked by nay nay 
math
if you tossed two number cubes, what sum has the greatest probability of occuring? Explain.
asked by Alex 
physics
A hollow aluminum cylinder 22.0 cm deep has an internal capacity of 2.000 L at 21.0°C. It is completely filled with turpentine at 21.0°C. The turpentine and the aluminium cylinder are then slowly warmed together to 87.0°C. (The average linear expansion
asked by anthony 
physics
A 40kg block of ice at 0°C is sliding on a horizontal surface. The initial speed of the ice is 7.0 m/s and the final speed is 4.7 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction
asked by anthony 
prealgebra
you play a CD that has 11 songs using the random setting find the probability that the CD player plays songs 3 first and then song 5.
asked by vivkvivkf 
mathinequalities
graph solution set of system of inequalities x+y< 4 x2y>6
asked by Anonymous 
physics
a pendulum consists of a wooden bob of mass m and length l. A Bullet of mass m1 is fired towards the pendulum with a speed v1.the bullet emerges out of the bob with a speed v1/3 and the bob just completes motion along a vertical line ,then v1 is?
asked by srikala 
physics
How do you know that a sealed calorimeter is a closed system? because temperature is consurved because the masses of the sample and water are equal because thermal energy is not transferred to the environment because work is done on the test sample Please
asked by kevin 
Math
Find a counterexample to show that the conjecture is false. Any number that is divisible by 5 is also divisible by 3. A. 45 B. 60 C. 30 D. 25
asked by China 
microsoft excell 2007
when working with predefined formulas in excel,what category contains the boolean functions? (a)math and trig (b)recently used (c)logical (d)auto sum my answer is c debbie needs to print her table.which of the following is not an excel print program?
asked by susue 
AP CHEMISTRY
A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH] is 1.0 x 10^2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^10. A. Assuming that the hydroxide is 1.0 x
asked by DAN 
microsoft excell 2007
helga needs to lay out her newly created pivot table.what are the two ways she can set up a pivot table? (a)when helga created the pivot table ,excel automatically put the fields to the appropriate cells of the pivot table.there are not two ways to set up
asked by susue 
physics
Which of the following statements is a consequence of equation E=mc^2? Energy is released when matter is destroyed Mass and energy are equivalent The law of conservation of energy must be modified to state that mass and energy are conserved in any process
asked by kevin 
physics
You need to determine the density of a ceramic statue. If you suspend it from a spring scale, the scale reads 35.4 N. If you then lower the statue into a tub of water, so that it is completely submerged, the scale reads 12.4 N. What is the density?
asked by Kristen 
physics
Please decide which of the following statements for car collisions are true or false. 1)Crumple zones on cars are parts of the front of the car that are designed to receive maximum deformation during a headon collision. The essential safety benefit of
asked by Marc 
Chemistry
At a certain temperature the vapor pressure of pure benzene is measured to be 322. torr . Suppose a solution is prepared by mixing 138.g of benzene and 91.2g of heptane . Calculate the partial pressure of benzene vapor above this solution. 3 sig figs!
asked by Elizabeth L. 
chemistry
When 50.0 mL of 0.050 M formic acid, HCHO2, is titrated with 0.050 M sodium hydroxide, what is the pH at the equivalence point?
asked by chamy 
Chemistry
The triation of 50.00 mL of 0.025 00 M MES with 0.100 0 M NaOH. MES is a weak acid with pKa=6.27. Compute Ve, first. Show what happens at the four stages of the titration: Va = 0,2,5,10,10.1,11,12, and 12.2 mL. I NEED HELP!!!!
asked by Lance 
physics
what effect did scientists originally think that the intensity of light shining on a photosensitive surface would have on electrons ejected from that surface?
asked by aaa 
U.S. History
Which one of these was not the causes of the Great Depression? excessive income taxes speculative stock purchases risky banking practices severe drought I think it is excessive income taxes or severe drought. But I don't think it is severe drought because
asked by Ricky 
the answer to ms.sue
the answer isantigua and barbuda, dominica, and palau. they add up to 157000 and i did by hand.
asked by Celest 
physics
The angle of incidence of light passing from air to a liquid is 38 degrees.The angle of refraction is 24.5 degrees. What is the index of refraction of the liquid
asked by ******tasha****** 
intermediate algebra
Essay.Show all work. A gardener wants to create a rectangular garden with the length of 3x2y ft. and the width of 3x3y ft. What is an algebraic expression for the area of the garden.Be sure to multiply this out.Express in the simpliest correct
asked by Lueshelle 
Math
a map of a country uses a scale of 2 inches = 19 miles. If the country is 76 miles wide, how wide is the map?
asked by Anna  Marie 
math
1. You want to survey people about their favorite exercise. Which sample below is more likely to be random? (1 point)You ask people on a jogging track in a park to name their favorite exercise. You ask people on their lunch hour at a downtown intersection
asked by NIKE 
chemistry
the molar heat capacity of water at 25 degrees celsius is 75.29JK/mol. an exothermic reaction with 5.00kJ proceeded to completion in a 200mL dilute aqueous solution,initially at 16.0 degrees celsius. what is the final temperature of the solution ? clearly
asked by ayanda 
ALGEBRA
If possible, completely factor the expression. (If the polynomial is not factorable using integers, enter PRIME.) x^25 x6
asked by Randy 
Social Sudies
I can't find the answer to my crossword puzzle! Here it is: A nation's factories, machines, etc. are it's____________capital. I know it's an 8 letter word, but that's all!
asked by Tori 
ALGEBRA
Solve the inequality. (Enter INFINITY for infinity and INFINITY for infinity as needed.) 3
asked by Randy 
ALGEBRA
Solve the inequality. (Enter INFINITY for infinity and INFINITY for infinity as needed.) 9x>=4 x + 34
asked by Randy 
chem 101
A one pound piece of iron was heated to 1000 °C and then quenched in a bucket containing one gallon of water at 25 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium? correct answer is 37C
asked by Anonymous 
physics
A charge of 2.1 nC and a charge of 4.7 nC are separated by 57.90 cm. Find the equilibrium position for a 4.7 nC charge. ____ cm from the 2.1 nC charge. what is the answer? and how did you get it? thaanks
asked by brittney 
Physics
An auto race is held on a circular track. A car completes one lap in a time of 19.2 s, with an average tangential speed of 39.8 m/s
asked by Loweri 
Math
a rectangle of integer dimensions is filed with 1x1 tiles. Each tile that touches the perimeter is colored red, while all the "interior" tiles are left white. Let R be the number of red tiles and W the number of whites tiles find R and W for a 3x10
asked by Jennifer 
chemistry
Nitrogen monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). Write a balanced equation for this reaction. the reaction is experimentally found to be (approximately) firstorder in H2 and secondorder in NO. Write down the form of the
asked by Kenzie 
physics
Where must an object be placed to have a magniﬁcation of 3.74 in front of a converging lens of focal length 14.1 cm?
asked by mark 
political
In the United Kingdom, the Queen represents which role? 1. Head of Government 2. Chief of State. which one is right? please help.
asked by shama 
physics
On a long journey if 10% of the distance is covered at an average speed of 40 km/h and 90% of the distance is covered at an average speed of 90 km/h. What is the average speed for the entire journey? How does this answer change if the percentages relate to
asked by tanmay bhoite 
Chemistry
a 3.67L flask is filled with carbon monoxide at 27 degrees !@#$%^&il the pressure is 1.27 atm. Calculate the total pressure after 3.42 moles of carbon dioxide has been added to the flask. (R=0.082 Latm/K mol)
asked by Randy 
health
I'm doing a health project on family. My question is how does your dad support you? I need ideas thank you
asked by laila 
Chemistry
The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and (delta) E for melting 1.00 mol of ice at 0 deg. C and 1.00 atm pressure.
asked by AChem 
chmistry
the volume of a sample of helium is 4.5ml at 20.0c and 203.0kpa. what will its volume be in the figure?
asked by Anonymous 
maths
an arc of a circle subtends a central angle of 5pi/6 radians.if the radius of the circle measures 10.6cm, determine the approx measure of the arc leanth
asked by sayan 
Albebra I
bayside insurance offers 2 plans: plan A: pay the 1st $60 + 0.30 of the rest of the bills; plan b = pay 1st $140 + 0.25 of the rest of thebills. For what amount of medical bills will plan B save money? Assume there are over $140 in bills
asked by Michelle 
physics
a simple pendulum of length 0.2m has bob of mass 5gm, it is pulled aside through an angle 60 degrees from the vertical. a spherical body of mass 2.5gm is placed at the lowest position of the bob. when the bob is released it strikes the spherical body and
asked by srikala 
math
A map has a scale of 1/2 inch to 4 miles. The shortest distance between two cities on the map measures 8 inches. If d represents the shortest distance between the two cities, what is d?
asked by sarah 
chem
The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+. Titrating with 0.0220 M KMnO4 requires 41.38 ml to reach the
asked by lara 
physics
a man of 50kg is standing on one end on a boat of length 25m and mass 200 kg .if he starts running and when he reaches the other end ,he has a velocity 2m/s with respect to the boat .the final velocity of the boat is?
asked by srikala 
Math
ok so the point are A(3,0) and B(4,6) and the question asks : the images of points A and B after a reflection in the line y=x. what im trying to ask is what axis does it go over the y or x axis?
asked by Jessica 
geometry
Find the height of a rectangular prism with a surface area of 286 inches squared, and a base measuring 63 inches
asked by Anonymous 
Life Orientation
Describe the life style disease Lack of Physical Fitness and Proper Nutrition in the Adolescent and explain 5 or more factors that contribute to the disease.
asked by Nehasen 
to ms.sue
i need help on #2 and #4
asked by Celest 
math
james said that it would cost him $6.55 per day to ski each of the five days if he bought a weekday pass. Why is his answer incorrect? type of ticket cost days used weekday $327.50 monfri
asked by stephanie 
Physics
Volume of 1200 L of helium at 4000 Pa is heated from 45.0°C to 75.0°C increasing the pressure to 6000 Pa. What is the resulting volume of gas?
asked by Madison 
AP CHEMISTRY
A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH] is 1.0 x 10^2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^10. (A) Assuming that the hydroxide is 1.0
asked by DAN 
to ms.sue
why does it have to be half of 315,00. i don't get #4 and #2. i still have a lot of homework
asked by Celest 
Algebra 2
What is the first term of a geometric series with a summation of 800, 4 terms and a common ratio of 3?
asked by Greg 
physics
Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
asked by Jason 
physics
a ball bounces directly upon another ball at rest and it self brought to rest by the impact.if half of initial kinetic energy is destroyed in the collision ,the coefficient of restitution is?
asked by srikala 
crjs101
how to present the processing requirements and the mandated pretrial measures required by law.
asked by Jason 
Math
Jamaal is planning to invest up to $23000 in City Bank or State Bank. He wants to invest at least $4000 in City Bank, but not more than $16000; since State Bank does not insure more than $8000, he wants to invest no more than this amount in State Bank. The
asked by Anonymous 
chemistry
The formate ion, (CHO2), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium
asked by bill 
to ms.sue
now i get it .later ill post you back to check the answer,okay?
asked by Celest 
artist
did Copley like the rich
asked by Anonymous 
sCIENCE PLZZZZZZZZ HELP
1. The surface tension in a cup of water is caused by ____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its container
asked by jhai9 
math
Select the equation that solves this problem: Eight coins (dimes and quarters) are worth 170 cents. How many dimes are there? a. 10d + 25(11  d) = 170 b. 10d + 25(8  d) = 170 c. 10d + 5(8  d) = 60 d. 10d + 5(11  d) = 60
asked by Cheril 
physics
a neutron of mass 1.67*1o power of (27) is moving with a velocity 10 to the power of(6) collides with a deuteron of mass 3.34*10 to the power of (27) kg at rest .after collision if both have single particle find its velocity
asked by srikala 
Chemistry
To produce 3.00 L of a 1.9 M solution of NaOH, how many grams of NaOH must be dissolved?
asked by Jessica 
statistics
For a sample size of 10 from a population whose standard deviation is not known, which type of probability distribution is used to help calculate a confidence interval for the mean?
asked by Anonymous 
MATH
a basketball player strikes out 3 times for every 2 hits he gets. If the player strikes out 15 times, how many hits does he get? If the player gets 46 hits, how many times does he strike out?
asked by MS. SUE HELP PLEASE 
Math
Truck A is carrying 2.5 tons of cargo. Truck B is carrying 4,500 pounds of cargo. Which truck is carrying more? (*Hint: 1 ton=2,000lb)
asked by Candy Corn 
chemistry
how many grams of ammonia (NH3) will react with 27.8 grams of nitric oxide (NO)? 4NH3 + 6NO d 5N2 + 6H2O
asked by Anonymous 
English
i writing a process analysis essay on topic staying healthy in winter and i making it a directional type of process analysis essay because it be easy to direct people on how to do things. the only points i get for staying healthy in winter be wearing warm
asked by Mohammad 
Math  Trig
A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? I just can't figure it out.
asked by Amy 
to ms.sue
can you give me an example of an invitation . i need to make one for homework. For: Date: Time: Place: description: RSVP: I don't know where to put my name!
asked by Celest 
Chemistry
How many moles of ammonium sulfate were released in 25.3 kg?
asked by sue 
math
A stack of 24 workbooks weighs 14 2/5 lb. How much does each workbook weigh?
asked by sam 
Reading for Ms. Sue please answer
1. What are two ways earn money? 2. What are six jobs at a newspaper? 3. What is the purpose of the Associated Press and the United Press International?
asked by Consquela 
geometry
the ratio of a length on a scale drawing or model to the corresponding length on the real object....is called what?
asked by Sage 
Phys
Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
asked by Sara 
phy
Some air at 275 kPa absolute pressure occupies 50.0m^3. Find its absolute pressure if its volume is doubled at constant temperature.
asked by Ricky 
intermediate algebra
short answer. fin the following quotient.x^236/x+6
asked by Lueshelle 
calculus
find the absolute minimum value on (0,infinity)...f(x)= x(1/x)+(2/x^3).. The example given is x(1/x)+(10/x^3) which is F(sqrt5)=(6/sqrt5)
asked by Rochelle F 
Algebra
9X+y=2 4Xy=17
asked by Jade 
7th grade history
who was the frist dutch priest in eurpoe
asked by caitlyn 
Physics
Volume of 1200 L of helium at 4000 Pa is heated from 45.0°C to 75.0°C increasing the pressure to 6000 Pa. What is the resulting volume of gas?
asked by Alexa 
to ms.sue
what do i write on the RSVP. my teacher said put my phone number there.
asked by Celest 
Math
Jake spent 3/8 of his money on a book and 1/2 of what was left on a magazine. He now has $6.25. How much money did he start with?
asked by cliff Stern 
science
2. An electric fan having a radius of 0.5 m is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 83.8 rad/s in 17.5 s. the deceleration is 42.0 rad/s2. Determine a) The initial angular speed of the fan b) the
asked by Jeff 
mental
The work ofis the foundation of psychotherapy. Can someone please help?
asked by kevin 
math
find the number of two digit natural numbers such that the tens digit is greater than the units digit.
asked by tanzima 
Maths
The Giant Ferris Wheel has a radius of 30meters. Assuming that a time t= t_0 , the wheel rotates counterclockwise with a speed of 40m/min, and is slowing at a rate of 15m/min^2 . Find acceleration vector for a person seated in a car at the lowest point of
asked by Thongfye 
Science  Physics
Some helium at 20.0psi gauge pressure occupies 40.0ft^3. find its volume at 32.4 psi if the temperature remains constant.
asked by Sharon 
English
Would this be a good start to a short story? And what do you think i should say next?? This is for two things, my English class, and my blog. Annabelle is a bright, smart and outgoing young twelve year old. Clifford is a easy going, adventurous eight year
asked by Paisley Jane 
chem
The pH of the nitrite buffer has changed from 3.00 to 2.80 by adding 11.0mL of 12.0M HCL. How many grams of solid sodium Hydroxide would the chemist add to the buffer to change the pH from 3.00 to 3.80?
asked by nicole 
physics
Consider 3 liters of an ideal (monatomic) gas at a pressure of 34 atm and a temperature of 356K. Call this state of the system A. Using the ideal gas law, calculate the number of moles of gas present in the system. 3.49 The temperature of the system is
asked by anonymous 
mental maths
what is 15 degrees lower than 7c
asked by jade 
Dynamics Maths
The Giant Ferris Wheel has a radius of 30meters. Assuming that a time t= t_0 , the wheel rotates counterclockwise with a speed of 40m/min, and is slowing at a rate of 15m/min^2 . Find acceleration vector for a person seated in a car at the lowest point of
asked by Thongfye 
physics
Ok, so I know I already posted another really long question but we have not learned this yet and are expected to do homework on it. Please help me. An ideal monotonic gas is compressed at a constant pressure of 0.9 atm from 14 L to 3.5 L. Note: Atmospheric
asked by anonymous 
physics
Which has the greater IMA: a screw with closely spaced threads or a screw with threads spaced farther apart? Can someone answer this
asked by kevin 
physics
Again, I know I keep posting questions but I'm begging you for help. At 25°C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr. What is the mole fraction of pentane in a pentanehexane solution that has a vapour pressure of
asked by anonymous 
to ms.sue
thank u so much?
asked by Celest 
English
I still have to check a few other sentences on the same subject. Thank you very much in advance,Writeacher. In particular sentences 456. 1) If I work at the passion, then it is the job itself that motivates me. 2) I will take up working tomorrow. (is
asked by Matthew 
prealgebra
you play a CD using the random setting. Are the selections of the first two songs that are played independent or dependent event?
asked by vivkvivkf 
geometry
What is the total surface area of a regular square pyramid with a base side length of 18cm and a height of 12cm?
asked by Piggy 
ALGEBRA
If possible, completely factor the expression. (If the polynomial is not factorable using integers, enter PRIME.) x^2+17 x+70
asked by Randy 
geometry
A cylindrical tank is being constructed to hold 10,000 ft^3 of water. The diameter of the tank is 36ft. What is the minimum height needed for the tank?
asked by Piggy 
algebra 2
b/3 + 6=82
asked by dee 
chemistry
what is the density of carbon dioxide at 26.5 degrees C and 755 mm Hg?
asked by randi 
geometry
A cone with a diameter of 7.2 meters and slant height of 8.8 meters is being filled with water at a rate of 2.5 m^3 per minute. How many minutes will it take to fill the cone?
asked by Piggy 
ALGEBRA
6y + 11x = 9 (a) Solve the equation for y. (Do not use mixed numbers in your answer.) y =
asked by Randy 
physics
Write down a halfreaction that explains the change that occurs on the surface of the copper spoon during electrolysis.
asked by Dludlu 
ALGEBRA
Let x = 1, y = 3. Find the value of the given capital letter. N = x**2 + 2 xy + y**2 + 3
asked by Randy 
World History
During the Columbian Exchange what diseases were brought from the new world to Europe?
asked by Jake 
prealgebra
you play a CD using the shuffle settings are the selections of the first two songs are played independent or dependent events???
asked by vivkvivkf 
Physics
A submarine called the DeepView 66 is currently being built to take tourists on undersea tours along tropical coral reefs. According to the guidelines of the American Society of Mechanical Engineers, to be safe for human occupancy the submarine must be
asked by Madeleine 
math
I have a surface area? my base is 18m, height is 4m and wisdth is 14m  do not understand the equation given by teacher of: top bottom, both sides and front and back to get answer  this does not make sense to me  please explain
asked by dj 
ALGEBRA
text((a) ) (4 L)/(5) = 3 L = Incorrect: Your answer is incorrect. text((b) ) 3 = (4 M)/4 + 11
asked by Randy 
Econonics
people join tennis clubs for a fixed free per year, which entitles them to play as much as they want without charge. because people who pay these feeds play more tennis than others( who can use free public courts), this means sucnk cost matter for
asked by michelle 
Physics  Matter
The buildup of plaque on the walls of an artery decreases its diameter from 1.1 cm to 0.60 cm. If the speed of the blood flow is 0.15 m/s before reaching the region of plaque buildup, find the speed of blood flow within the plaque region. [3 marks]
asked by Madeleine 
ALGEBRA
Solve the equation. 2(W + 4)  3(W + 2) = 0
asked by Randy 
Culture Diversity
Throughout most of U.S. history in most locations, what race has been the majority?
asked by Private 
Chemistry
The pressure of an unknown gas is measured with a manometer. Instead of mercury the manometer is filled with a liquid (X) whose density is 0.553 g/cc. The pressure is measured as 653 mmX. What is the pressure in mmHg?
asked by Alex 
chem 101
Biphenyl (C1 2H1 0) burned in a bomb calorimeter in order to determine its heat of combustion. The heat capacity of the calorimeter was 5.86 kJ/°C When 0.514 g of biphenyl was burned, the temperature of the calorimeter increased from 25.8 °C to 29.4 °C.
asked by Anonymous 
Physics  Matter
Wind blows around a skyscraper with a speed of 18 m/s outside a large pane of plate glass. What is the difference in air pressure between the inside and outside of the skyscraper? Take the density of air to be 1.3 kg/m3 and assume the air inside the
asked by Madeleine 
chem 101
Biphenyl (C1 2H1 0) burned in a bomb calorimeter in order to determine its heat of combustion. The heat capacity of the calorimeter was 5.86 kJ/°C When 0.514 g of biphenyl was burned, the temperature of the calorimeter increased from 25.8 °C to 29.4 °C.
asked by Anonymous 
prealgebra
you play a CD with 11 songs using the shuffle settings. find the probability that the CD player plays song 3 first then song 5.
asked by vivkvivkf 
ALGEBRA
x2  5x + 5 = 0
asked by Randy 
math
if 8 counters are 6/12, then what is the one?
asked by kwadwo 
chem 101
How much heat is required to raise the temperature of exactly one liter of water fro m 60 °F to 180 °F? answer: 279 kj/mol
asked by Anonymous 
ALGEBRA
Factor the expression by using areas. x^2+2 x8
asked by Randy 
chem 101
Determine the heat of combustion of ethyl alcohol (C2H6O). the right answer is 1238.43 kj/mol. Help with process thank you
asked by Anonymous 
chem
An experimental alloy contained by copper and tantalum. 3.7950 g of the alloy was dissolved and analyzed gravimetrically. The copper was precipitated and weighed as CuO, a mass of 0.1805 g was obtained. Calculate the %w/w Cu in the alloy. [Answer in 2
asked by lara 
SS7R  Bill of Rights Project
Why does everyone need to have a lawyer? What are the benefits?? I want to include this in my paragraph for the 6th amendment. Please make sure itâ€™s on a 7th grade regentâ€™s level. 6th Amendment The Sixth Amendment (Amendment VI) to the United
asked by Laruen 
English
I still have a few sentences to check. Thank you very much, Writeacher. 1) I would worl at a passion (my passion), because even if I know it is difficult to take off, I think that the job itself can motivate me. In fact, I'd prefer to have a job in which I
asked by Matthew 
chemistry
which are ionic compounds? SO2 PCl3 NaBr PbO AlF3
asked by haley 
chem
0.1802 g sample of a chlorocarbon compound was analyzed by burning in oxygen and collecting the evolved gases in a solution of sodium hydroxide. After neutralizing, the sample was treated with 39.50 mL of a 0.025 M AgNO3. This precipitated the Cl as AgCl
asked by lara 
physics
What are two general types of energy that can be used to classify many forms of energy? Can someone help
asked by kevin 
Physics
A charge of 3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.120 m). The charges on the circle are 4.40 µC at the position due north and +5.00 µC at the position due east. What is
asked by Adie 
math
when jason arranges his toy soldiers in rows of 6, he has left 1.when he arrahges them in rows of 8, he has 3 left over. when he arrenges in rowsof 10 then 5 left over. what is the smallest possible number of toy soldiers that jason plays with/
asked by mima 
Social Studies
A nation's factories, machines, etc. are it's_______capital. _ _ y _ _ _ A _
asked by Anmol 
math
14z^2 + 6z + 8 ————————————— = ? 2
asked by Cheril 
s.s help
1. In a typical rural village in Mexico, you might expect to find that most people living on farms get their food by (1 point)growing their own. buying what they need at large supermarkets. buying what they need at small markets. gathering nuts and wild
asked by NIKE 
English  ms. sue
ms. sue what i name this process analysis essay? i not want to say how to stay healthy in winter.
asked by Mohammad 
physics
A 1.4kg copper block is given an initial speed of 2.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in
asked by Anonymous 
English
Hello. I will really appreciate some help. 1)Which preposition is correct in the context "to work at/in a company"? 2)Is it "a vacancy at" or "in our company"? 2)Which is the correct word order in the following wordgroup: "British TV dance show" or
asked by Ilma 
Algebra I
Please show me how to solve: The value of a $20,000 car decreases every year, t. The equation below models this situation: 20000(10.04t)=13,000. After how many years will the car be worth $13,000. Round to the nearest tenth if necessary.
asked by Jane 
math
a standard deck of playing cards contaons 52 cards in for suits of 13 cards each. two suits are red and two suits are black. find each probability. assume the first card is replaced before the second is drawn. (balck,Queen) (black,Diamond) (jack,Queen)
asked by Anonymous 
english
I need a title for an essay I am writing on Oliver sacks. Any suggestions?
asked by Karen 
english
Hi I have to compare Mending Wall by Robert Frost to modern day time. I was thinking about comparing it to a song or movie, but I'm not sure of any. Do you have any ideas?
asked by jack 
chemistry
At room temperature (about 20C) milk turns sour in about 64 hours. In a refrigerator at 3C, milk can be stored for about three times as long before turning sour. (i) Determine the approximate activation energy for the reaction that causes milk to sour, and
asked by Kenzie 
math
2. A bullet is fired from the ground at an angle of 45o above the horizontal. What initial speed vo must the bullet have in order to hit a point 550 ft high on a tower located 600 ft away (ignoring air resistance)?
asked by nady 
SS7R  Billf of Rights  7th Amendment
The Seventh Amendment to the United States Constitution, which was ratified as part of the Bill of Rights, codifies the right to a jury trial in certain civil cases. We have the right to trial by jury for civil trials. What do the 7th amendment means and
asked by Laruen 
math
can you show me step by step how to factor 15x^214x8
asked by sam 
calculus
2. A bullet is fired from the ground at an angle of 45o above the horizontal. What initial speed vo must the bullet have in order to hit a point 550 ft high on a tower located 600 ft away (ignoring air resistance)?
asked by nady 
math
Which of the following equations represents the equation for the line that is parallel to the given line and passes through the given point? y= 1/5 x  10; (15, 16) A. y = 5x +19 B. y = 1/5x + 91/5 C. y = 1/5 x  19 D. y = 5x  19 I do know that to be
asked by Jane 
Chemistry
What amperage is required to plate out .250 mol Cr from a Cr+3 solution in a period of 8.00 h?
asked by Alan 
Chemistry
50.00 mL samples of 0.200 mol/L potassium phosphate with an excess of 0.120 mol/L lead II nitrate solution. what is the minimum volume of lead II nitrate solution required? What volume of lead II nitrate solution should the instructor tell the students to
asked by Michelle 
math
what is the percent of 12 and 15
asked by haylea 
Science
A weight lifter lifts a barbell from the ground, raises it at a constat velocity and holds it motionless over his head. How does the force of the lifter compare with the wieght of the barbell at different stages of the lift?
asked by Sally 
Math
A new school has opened with fewer than 500 students. 1/3 of the students is a whole number. So are 1/4, 1/5 and 1/7 of the students. How many students go to this school?
asked by Tin 
math
Select the equation that solves this problem: Eight coins (dimes and nickels) are worth 60 cents. How many dimes are there? a. 10d + 25(11  d) = 170 b. 10d + 25(8  d) = 170 c. 10d + 5(8  d) = 60 d. 10d + 5(11  d) = 60
asked by Cheril 
World History
For a project I'm doing for world history, I have to include 2 "VIP's" for Winston Churchill. Does anyone know of a person who contributed to Churchill's fame or someone who was important to Churchill that I could research to include as one of my VIP's?
asked by Ellie 
Accounting
Our company bought the fullydepreciated personal car of our General manager. What is the proper and correct journal entry?
asked by Benjo 
SCIENCE
describe the preparation of 100mls of 1,0M from concentrated HCL?
asked by LT 
English
Hello. Please help me with a question. Will you use an article in the context: "his task was to monitor (the?) information on the trial in the press"? Thank you very much.
asked by Ilma 
physic
a bullet is fired from the ground at the angle of 30 degree above the horizontal,What initial speed must the bullet have in order to hit a point 250 ft high on a tower located 400 ft away (ignoring air resistance),what the solution?
asked by aisya 
chemistry
Calculate the mass of Li formed by electrolysis of molten LiCl by a current of 7.5X10^4 A flowing for a period of 24 hours. Assume the electrolysis is 85% effective.
asked by Nikolai 
Chemistry
Household vinegar is acqueous 5.00%,acetic acid solution(by mass),if its density is 1,01 g/ml.calculate the mole fraction!molarity,and molality of the solution.
asked by Marcia 
math
Wendy found a rule for a table. The rule she made is y = x + 2.She says that means every yvalue will be even.Is she correct?
asked by Bebe 
chemistry
For the titration of 50.00 mL of 0.1000 M ammonia with 0.1000 M HCl, calculate the pH (a) before the addition of any HCl solution, (b) after 20.00 mL of the acid has been added, (c) after half of the NH3 has been neutralized, and (d) at the equivalence
asked by chamy 
1980's la
Im writing a paper on the 1980 's but having trouble with coming up with 1 word to describe that decade? Can u help. ??
asked by Marko 
Science
1. The surface tension in a cup of water is caused by ____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its container
asked by jhai9 
Algebra 2
Evaluate the expression. 10x^3y^5z^2 if x=3, y=2, z=5
asked by Nancy 
Chemistry
Which of the following is the most effective buffer system for a pH value of 7.45? Assume all are 1M A. Carbonic acid and sodium bicarbonate B. Sodium bicarbonate and sodium carbonate C. Sodium dihydrogen phosphate and disodium hydrogen phosphate D
asked by Linda 
Chemistry
The pH of vinegar is 2.40. Calculate the concentration of hydronium ions and hyrdroxide ions in vinegar.
asked by Autumn 
physics
Devise a method for measuring the coefficient of friction between two surfaces using an inclined plane
asked by myra 
physics
Two equal weight monkeys each hang from the ends of a rope passing over a weightless, frictionless pulley. If one accelerates up the rope, what happens to the other?
asked by myra 
chemistry
Write a balanced equation showing the solubility equilibrium reaction of solid calcium hydroxide??
asked by Anonymous 
physics
A wet bar of soap slides freely down a ramp 2.0 m long inclined at 6.8o. How long does it take to reach the bottom? Neglect friction.
asked by myra 
algebra
The length of a rectangle is 4 times its width. If the length of the rectangle is cut in half, the new perimeter is which percent of the original perimeter
asked by Anonymous 
Maths
how would you factorise this: (p+q)^2+5(p+q) to get this answer:(p+q)(p+q+5)
asked by Remy 
Chemistry
The pH of vinegar is 2.40. Calculate the concentration of hydronium ions and hyrdroxide ions in vinegar.
asked by Autumn 
SS7R  Bill of Rights Project  8th Amendment
8th Amendment The Eighth Amendment to the United States Constitution is the part of the United States Bill of Rights prohibiting the federal government from imposing excessive fines or cruel and unusual punishments. Excessive hail shall not be required nor
asked by Laruen 
enviromental science
what are the two causes of density in deep current waters.
asked by blue 
Chem Lab
Can the NH3/NH4Cl system be sued to prepare a buffer of a pH 9.5? why or why not? Can it prepare a buffer of pH 5? There were two buffers, 0.2 M and 0.1M.
asked by Logan 
physics
A circus a dog is traned to run a stranght path of length 50m/s in the direction AB as shown in the accompanying diagram.the dog starting from rest can attain a maxium speed of 5m/s in 10sec when released from any point along the path AB .the after it
asked by Nelson 
physics
a ball of mass m , moving with uniform speed, collides elastically with another stationary ball.the incident ball will lose maximum kinetic energy when the mass of the stationary ball is?
asked by srikala 
Reading
What is the scene illustrationreflective plot
asked by Natalie 
social studies
What are words that start with Z and X and have to do with the Revolutionary War?
asked by Jaron 
to ms.sue
the table below shows the approximate population for the 10 least populated countries in the world.use the data to estimate answers to the problem. vatican city 900 tuvalu 11,000 nauru 13,000 palau 20,000 san marino 28,000 manaco 32,000 liechtenstein
asked by Celest 
physics
a ball falls vertically onto a floor , with momentum p,and then bounces repeatedly.the coefficient of restitution is e.the total momentum imparted by the ball is
asked by srikala 
math
Please solve and explain how to solve the compound inequality: 4 < 4a +3 < 18
asked by Jane 
physics
two perfect elastic balls of same mass m are moving with velocities u1 and u2 . they collide elastically n times. the kinetic energy of the system finally is?
asked by srikala 
to ms.sue
why divide it by 69,000
asked by Celest 
physics
A spring whose spring constant is 650 N/m is compressed 0.300 m. What speed (in meters/second) can it give to a 0.300 kg ball when released
asked by peter 
math
Observe the first three sets of numbers to determine the missing value in the fourth set. Are you sure you know the value? {5, 23, 12, 16} {1, 39, 14, 52} {17, 47, 42, 12} {25, ?, 11, 31}
asked by Rae 
physics
You need to determine the density of a ceramic statue. If you suspend it from a spring scale, the scale reads 35.4 N. If you then lower the statue into a tub of water, so that it is completely submerged, the scale reads 12.4 N. What is the density?
asked by Kristen 
physics
What is the minimum work in joules needed to push a 1540 kg car 44.0 m up a 12.5 degree incline?
asked by michelle 
health
Children and adolescents are considered to be reflected in which age group? A. 617 years old B. 317 years old C. 517 years old D. 1017 years old
asked by emily 
maths
Angle a lies in the second quadran and angle b lies in the third quadrant such that cos a = 3/5 and tan b = 24/7. Determine an exact value for cos (a+b), sin(ab)
asked by sayan 
physics
An object of mass 200.0kg is moving from rest under the influence of net force 1.0Kn.Find the acceleration of the object and work done within 20.0s.What is the velocity of the object at the end of 20.0s interval of time? Calculate the kinetic energy
asked by ******tasha****** 
math
Show the formula correctly being solved for the variable c. W = (c + m +y)/z
asked by Jane 
Speech
I am going to be giving a demonstration speech that has to be between 310min, but i am not sure what to do it on. I was showing how to make an item/ product that you normally buy from the store but can easily make at home but am not sure. It either has to
asked by rebekah 
Chemistry help!!!
The class will react 50.00 mL samples of .200 mol/L potassium phosphate with an excess of 0.120 mol/L lead II nitrate solution. what is the minimum volume of lead II nitrate solution required? What volume of lead II nitrate solution should the instructor
asked by Anon 
geometry
Given that AB is a tangent of the circle with the center at X, AB = 12, and XD = 2.5, which is the length of DB?
asked by Anonymous 
chemistry
The formate ion, (CHO2), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium
asked by bill 
government
Using the Internet, encyclopedia, and/other reference material for research, write a 1,000word report on feudalism in the history in one of the following countries: •France •England •Germany Include the approximate years when feudalism began and
asked by greg 
tax
If the proceeds of a pension plan are being distributed and the original beneficiary dies, the: A. person who inherits the plan assets can elect to be treated as the original beneficiary if that person is the spouse of the original beneficiary. B. person
asked by Andy 
English
Writeacher, here are some sentences I'd like you to revise. Thank you. 1) The teacher let the students off with a warning (let off the students is a mistake?) 2) I'm looking forward to my sister's letter. (I'm waiting impatiently for my sister's letter;
asked by Matthew 
physics
A space shuttle orbiting Earth at an altitude of 295 km completes an orbit in 90.0 min. Calculate its acceleration and compare it to the acceleration at Earth’s surface.
asked by myra 
reasearch paper
what activities are in the pre writing stage of the writing process?
asked by layton 
physics
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 104°C−1). At room temperature (20.0°C), the frames have circular lens holes 2.27 cm in radius. To what temperature must the frames be heated if lenses 2.28
asked by greg 
physics
A motorcycle stunt rider wants to do a looptheloop within a vertical circular track. If the radius of the circular track is 10.0 m, what minimum speed must the motorcyclist maintain to stay on the track? Suppose the radius of the track was doubled. By
asked by myra 
English
I left out the following sentences. Thank you very much, Writeacher. 1) I think everybody would work at a passion but many times (mistake) this is often not possible. 2) If I worked, I would work at a job because I'll need (I need) to put aside money for
asked by Matthew 
physics
You want to design a curve, with a radius of curvature of 35.0 m, so that a car can turn at a velocity of 15 m/s on it without depending on friction. At what angle must the road be banked?
asked by myra 
English
I left out two sentences. Thank you very much. 1) My father took a day off to bring (better take/drive) me to the beach. 2) She is looking through the data on her monitor.
asked by Matthew 
Physics
A cylindrical 7.00kg reel with a radius of 0.60 m and a frictionless axle, starts from rest and speeds up uniformly as a 3.00kg bucket falls into a well, making a light rope unwind from the reel (Fig. P8.36). The bucket starts from rest and falls for
asked by Julia 
Physics. PLEASE HELP!!
A ball bounces to 45 percent of its original height. What fraction of its mechanical energy is lost each time it bounces? What is the coefficient of restitution of the ballfloor system?
asked by Amber 
Environmental Science
23. During the period of human history known as the ____, human populations grew rapidly because of advances in farming methods. a. Industrial Revolution b. "Tragedy of the Commons" c. agricultural revolution d. huntergatherer period C? But it could also
asked by mysterychicken 
microsoft excell 2007
entering the formula=SUM(C5:C18)is cell C19 will resolve in which of the following? (a)cells C5 and C18 will be added together (b)cells C5 and C18,and C19 will be added together (c)the total of cells C5 to C19 will appear in cell C19 (d0the total of cells
asked by susue 
SS7R  Bill of Rights Project Check
Please check my project to see if it's good. LET ME KNOW IF THERE ANY GRAMMERS, OR ERRORS!!! I hope you love my project I had been working hard on this. BTW  For those teachers who don't know about my project ask Ms. Sue or check on my name to see my
asked by Laruen 
Physics
Given that acceleration due to gravity at the surface of the earth is 9.8N/kg, estimate a value for the mass of the earth. G=6.7x10^11
asked by Amponsah 
Physics. PLEASE HELP!!
A ball bounces to 45 percent of its original height. What fraction of its mechanical energy is lost each time it bounces? What is the coefficient of restitution of the ballfloor system?
asked by Amber 
Physics
Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
asked by Madison 
Physics
Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
asked by Madison 
Physics
Some air at 275 kPa absolute pressure occupies 50.0m^3. Find its absolute pressure if its volume is doubled at constant temperature.
asked by Madison 
Analy Chem
Consider the titration of 100.0 mL of 0.110 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va:Va = 0,2,5,8,10,10.1,11,11.1, and 12mL. Compute Ve, first.
asked by curtis 
Basic Algebra
The width of a rectangle is x inches long. The length of that rectangle is 5 inches less than Twice the width. If the perimeter measures 26 inches, what is the measure of the length and width of the rectangle. Show all the work and the algebra you used to
asked by KP 
Physics
A welding tank has a gauge pressure of 2000psi at 40.0°F. What is the new gauge pressure if the temperature rises to 100°F?
asked by Madison 
math
A crate full of sugar cubes has a volume of 3 cubic feet. The volume of each sugar cube is 0.5 cubic inch. How many sugar cubes are there in the crate?
asked by solangie 
Intermediate Micro economics
A firm with a kinked demand curve experiences an increase fixed costs. Explain how the firm's price, output and profit change.
asked by Loini 
Microeconomics
What is the definiton of marginal proficiency consumer?
asked by Margaret 
biology
Predict the expected change to blood flow should norepi act on arteries of the abdominal cavity? A. Blood flow increases B. Blood flow decreases C. Blood flow stays the same but pressure increases D. Blood flow stays the same but speed decreases E. None of
asked by Jim 
biology
What must the systolic blood pressure be valued at for adequate mean arterial pressure if the diastolic pressure is 75? (Assume resting conditions) A. at least 90 B. at least 95 C. at least 100 D. at least 105 E. at least 110 F. at least 115 G. at least
asked by Jim 
chemistry
26 g of methane CH4 has a pressure of 450 kPa at 250 degrees celcius find the volume occupied by the gas
asked by db 
Physics
Given 435 in^3 of nitrogen at 1340psi (absolute) at 72.0°F. Find the volume at 1150psi at 45.0°F.
asked by Madison 
Math
If theta is a standard position angle and cot theta=1.85, in which quadrant(s) could theta lie?
asked by Person 
government
Which branch of the law regulates wrongful acts involving injury to one’s person, property, or reputation in a situation not covered by the terms of a contract
asked by Anonymous 
intermediate algebra
short answer.Find the quotient.6x^35x^213x+13/2x+3
asked by Lueshelle