Questions Asked on
March 5, 2012

Chemistry
At equilibrium, the concentrations in this system were found to be [N2] = [O2] = 0.100 M and [NO] = 0.500 M. N2(g) + O2(g) 2NO(g) If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is
asked by David 
Chemistry
In which direction will the net reaction proceed. X(g) + Y(g) Z(g) .. Kp = 1.00 at 300k for each of these sets of initial conditions? 1) [X] = [Y] = [Z] = 1.0 M a] net reaction goes to the left [this one?] b] net reaction goes to the right c] reaction is
asked by Tracy 
physics
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The freefall acceleration on the moon is 1/6 of its value on earth. Suppose he hits the ball with a speed of 25 m/s at an angle of 28°
asked by Haley 
geometry
Which type(s) of symmetry does the uppercase letter H have? my answer i believe is reflectional symmetry Which type of symmetry is shown by the lowercase letter w? my answer i believe is rotational symmetry. Could someone please check and explain.
asked by Brandon 
Physics
Pilots can be tested for the stresses of flying highspeed jets in a whirling "human centrifuge," which takes 1.8 min to turn through 21 complete revolutions before reaching its final speed. 1. What is the angular acceleration?(rev/min^2) 2. What is the
asked by Ben 
Chemistry
Consider this system at equilibrium. A(aq) B(aq) Delta H = +750 kJ/mol .. What can be said about Q and K immediately after an increase in temperature? a] Q > K because Q increased.. b] Q>K because K decreased.. c] Q
asked by Tracy 
Chemistry
consider the following reaction: 2CH3OH(g) yields 2CH4(g) + O2(g) change in enthalpy= 252.8kJ Calculate the amount of heat transferred when 26.0 g of {\rm CH_3OH} (g) is decomposed by this reaction at constant pressure.
asked by Dylan 
geometry
In the graph below, point D is reflected across the yaxis. What are the coordinates of it's image? The graph looks like D is below the xaxis to the right 3 places from yaxis and down 1 place from xaxis. So would my answer be (3,1)?
asked by Brandon 
Chemistry
Did I answer this equilibrium question correctly? 2CO(g) + O2(g) 2CO2(g) 1) How will increasing the concentration of CO shift the equilibrium? a] to the right [i chose this] b] to the left c] no effect 2] how will increasing the concentration of CO2 shift
asked by Tracy 
ENGLISH 11
Richard Bone by Edgar Lee Masters: When I first came to Spoon River I did not know whether what they told me Was true or false. They would bring me an epitaph And stand around the shop while I worked And say "He was so kind," "He was wonderful," "She was
asked by JIM 
College Physics Help
A thin rod (length = 1.10 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from
asked by Angela 
Chemistry
consider the following reaction: 2CH3OH(g) yields 2CH4(g) + O2(g) change in enthalpy= 252.8kJ How many kilojoules of heat are released when 38.4 g of CH_4 g) reacts completely with O2 (g) to form CH3OH (g) at constant pressure?
asked by Dylan 
Statistics
5. Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. a. What is the probability that a randomly selected exam will have a score of at least 71? b. What percentage of exams will have
asked by Zac 
social studies
Label 2 bays that Hudson saw. I know the answer is Delaware Bay and Chesapeake Bay but I don't know where 2 label them.there's a map in my social studies book but it only talks about the Hudson Bay.There's a map in my book and it says AREA OF HENRY
asked by Gabby ( 5 grade) 
Mechanics
A 30.0kg block is resting on a flat horizontal table. On top of this block is resting a 15.0kg block, to which a horizontal spring is attached, as the drawing illustrates. The spring constant of the spring is 325 N/m. The coefficient of kinetic friction
asked by MLC 
Trigonometry
an airplane over the pacific sights an atoll at a 11 degrees angel angle of depression. if the plane is 410 m above water how many kilometers is it from a point 410 m above the atoll
asked by :) 
College Physics
Some bacteria are propelled by motors that spin hairlike flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.1x108m, and a tangential speed at the rim of 2.0x105 m/s. (a) What is the angular speed (the magnitude
asked by Angela 
Chemistry
At a given temperature, the elementary reaction A B in the forward direction is first order in A with a rate constant of 2.60 x 10^2 s^1. The reverse reaction is first order in B and the rate constant is 8.50 x 10^2 s^1. What is the value of the
asked by Jessica 
AP Chemistry
Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to synthesize adenosine triphosphate (ATP). At pH 7.0 the following reduction potentials pertain to this oxidation of CyFe2+:
asked by Radhika 
physics
A batter hits a popup straight up over home plate at an initial velocity of 29 m/s. The ball is caught by the catcher at the same height that it was hit. At what velocity will the ball land in the catcher's mitt? none of these 29 m/s 14.5 m/s 14.5 m/s
asked by Haley 
chem
a mixture of 0.156 moles of C is reacted with 0.117 moles of O2 in a sealed, 10.0L vessel at 500K, producing a mixture of CO amd CO2. The total pressure is 0.640 atm. what is partial pressure of CO?
asked by shery 
Geometry
Guy wires 80 feet long support a 65 foot tall telephone pole. To the nearest degree, what angle will the wires make with the ground?
asked by Jackie 
Business communication
I have to revise these sentences as if speaking to a 10th grade level in education. Can you tell me if these are correct: 1. We must terminate all deficit financing. Revision: We need to end all debts. 2. We must endeavor to correct this problem by
asked by Sue 
chemistry
How do you do the hybridization of CBr4?
asked by erin 
Physics
Two blocks, each with a mass = 0.168 kg, can slide without friction on a horizontal surface. Initially, block 1 is in motion with a speed = 1.28 m/s; block 2 is at rest. When block 1 collides with block 2, a spring bumper on block 1 is compressed. Maximum
asked by Lilly 
geometry
The coordinates of the vertices of triangle CDE are C(1,4), D(3,6), and E(7,4). If the triangle is reflected over the line y=3, what are the coordinates of the image of D? I think (3,6), but not real sure.
asked by Brandon 
physics
A box with a mass of 2 kg is lifted (without acceleration) through a height of 8.0 m in order to place it upon the shelf of a closet. (a) What is the increase in potential energy of the box? 1 . J (b) How much work was required to lift the box to this
asked by Sara 
Calculus
The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400) a)If the speed limit is 50 km/h, determine the legal speed that will maximize the fuel efficiency. Could someone explain to me why the legal speed
asked by Jessica 
Chemistry
I did a back titration with an unknown carbonate and using the average % carbonate (by mass) which I found to be 27.40% and appropriate calculation decided where the unknown is an alkali metal carbonate or an alkaline earth metal carbonate. I have no idea
asked by Laura 
Physics
Two converging lenses are separated by 23.40 cm. The focal length of each lens is 12.20 cm. An object is placed 35.00 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right.
asked by DCM 
Physics
A 73.3 kg man steps out a window and falls (from rest) 1.09 m to a sidewalk. What is his speed just before his feet strike the pavement? 4.62 m/s If the man falls with his knees and ankles locked, the only cushion for his fall is a 0.510 cm give in the
asked by Brett 
Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect
asked by Kathryn 
Chemistry
How many moles of nitric acid will be produced when .51 mole of dinitrogen pentoxide reacts
asked by Bob 
Trig
A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
asked by Unkown 
Chemistry
In phosphoric acid, why is it relatively easy to remove the first proton, considerably harder to remove the second proton, and extremely difficult to remove the third proton in chemical reactions? I'm not sure about this one is it because each time a
asked by Tina 
Chem 2
The following system is at equilibrium with [N2O4] = 0.55 M and [NO2] = 0.25 M. If an additional 0.10 M NO2 is added to the reaction mixture with no change in volume, what will be the new equilibrium concentration of N2O4? N2O4(g) 2 NO2(g)
asked by Beth 
physics
An egg is thrown nearly vertically upward from a point near the cornice of a tall building. It just misses the cornice on the way down and passes a point a distance 48.0 m below its starting point at a time 5.00s after it leaves the thrower's hand. Air
asked by aisha 
physics
A jet of water squirts out horizontally from a hole near the bottom of the tank, as seen in the figure below. Assume that y = 1.19 m and x = 0.544 m. What is the speed of the water coming out of the hole? The hole has a diameter of 3.06 mm. What is the
asked by Jackie 
Chemistry
1. As a research chimst, you are intrested in studying the extent and type of interactions in aqueous salt solution. As part of this study, you weight three samples of NaCl and dissolve each in 1.000kg H2O. You then measure the freezing temp. of each
asked by Liz 
Chemistry
Prepare a theoretical titration curve for titration of 25.0 mL of 0.1037 formic acid (HCOOH; pKa = 3.75) solution (diluted to 100 mL volume with deionized water) by 0.0964 M solution of KOH. I have to determine volume of KOH needed to reach equivalence
asked by Clint 
Physics
How far above the surface of Earth would you weigh 63.6 percent of your surface weight?
asked by Sarah 
physics
A meter stick is held vertically above your hand, with the lower end between your thumb and first finger. On seeing the meter stick released, you grab it with these two fingers. You can calculate your reaction time from the distance the meter stick falls,
asked by aisha 
physics
A race car accelerates from 0.0 m/s to 30.0 m/s with a displacement of 45.0 m. what is the car's acceleration ?
asked by blue 
physics
A ball thrown horizontally at 27 m/s travels a horizontal distance of 51 m before hitting the ground. From what height was the ball thrown?
asked by Haley 
3 grade english
subject and object pronouns write each sentence. replace the underlined words with subject or object pronouns. 1When some people visited the South Pole, the people wore heavy coats to keep the people warm. underline the word is (the people, the people) my
asked by dw 
Math
the design below grows each day, as shown. if the pattern continues to grow like this, how many tiles will there be in the design on the tenth day? on the fiftieth day? Day 1 1 tile Day 2 5 tiles Day 3 13 tiles
asked by Erica 
Chemistry
Suppose 50.0 mL of an aqueous solution containing an unknown monoprotic weak acid is titrated with 0.250 M KOH. The titration requires 31.52 mL of the potassium hydroxide solution to reach the equivalence point. What is the concentration (in molarity) of
asked by Chill 
physics
You are playing right field for the baseball team. Your team is up by one run in the bottom of the last inning of the game when a ground ball slips through the infield and comes straight toward you. As you pick up the ball 62 m from home plate, you see a
asked by Haley 
Trig
Please help. I can't get this problem at all. When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that
asked by HELP 
Chemistry
Hoe Many moles of each reactant are Needed to produce 3.60 x 10^2g CH3OH?
asked by Andrea 
Budgeting
A wellestablished coffee shop, the Hot New Café, wants to build a new café for increased capacity. It’s expected sales are $800,000 for the first 5 years. Direct costs including labor and materials will be 50% of sales. Indirect costs are estimated at
asked by Stacy 
Biology Science
Arrange the following in correct order in food chain Fish,Plankton,Shark,Crab
asked by Sweeny 
Trigonometry
a 30 feet ladder resting against a building makes a 60 angle with the ground . find the Height from the ground at which the ladder touches the building to the nearest foot
asked by :) 
chemistry
How do i calculate the concentration of H2O2 after 150 mL of distilled water is added to 30 mL of 1.0 M of H2O2?
asked by hayley 
Math
Please explain how this is set up and how to work it. thanks A rectangular box is 4cm wide, 4cm tall, and 10cm long. What is the diameter of the smallest circular opening through which the box will fit? Round to the nearest tenth of a centimeter.
asked by Jane 
physics
Atop a cliff, a projectile is fired horizontally with an initial speed of 10 m/s. Neglecting air drag, what is its speed 1 second after it is fired? A) 20 m/s.B) 14 m/s.C) 30 m/s. D) 28 m/s.E) 10 m/s.
asked by jim 
Trigonometry
A side 2.8m long makes an angle of 25 degrees with the ground how high is the top of the slide above the ground .
asked by :) 
Physics
A rollercoaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the
asked by Sara 
Physics help.
If a curve with a radius of 94.5 m is perfectly banked for a car traveling 72.4 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 96.4 km/h?
asked by Annie 
math
Joe plants a rectangular garden in the corner of his field. the area of the garden is 60% of the area of the field. what is the longest side length of Joe's field, in feet. Garden: 16ft x 12ft, Field: 2x ft by 2x ft.
asked by Jane 
social studies
Trace in blue the river Hudson sailed up.I know it's the Hudson river but,i don't know where 2 label it i need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ( the other question that i wrote, this is the same map that you need).
asked by Gabby ( 5 grade) 
physics
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 42 m/s and at an angle of 33°. A cannonball that was accidentally dropped hits the moat below in 1.6 s. (a) How far from the castle wall does the
asked by Haley 
physics
an experimental rocket plane lands on skids on a dry lake bed. it is traveling at 80.0 m/s when it touches down, how far does it slide before it comes to a stop? assume the coeffcient of kinetic friction between the skids and the lake is .600
asked by sarah 
Trigonometry
A lookout spots a fire from a 36 meter tower the angel of depression from the tower to the fire is 21 degrees . To the nearest meter how far is the fire from the base of the tower
asked by :) 
Physics
A lukewarm bottle containing 800 grams of water is placed in a refrigerator. How many calories of heat must be removed from that water to chill its temperature from 55 c to 4 c? Q = m(c)(delta t) Q = (100g)(1.0 c/g*c)(51c) = 40,800 Is the answer correct?
asked by Tracy 
Algebra
An algebra teacher drove past a farmyard that was full of chickens and pigs. The teacher happened to notice that there were a total of 70 heads and 200 legs. How many chickens and how many pigs were there?
asked by Amaris 
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 80 ft of fence? what should the dimensions of the garden be to give this area. The maximum
asked by Mary 
Calculus I
Sketch the graph of f by hand and use your sketch to find the absolute and local maximum and minimum values of f. 18. f(x) = 1/x , 1 < x < 3 I can graph it just fine, but for my answer I got that the function has none of the above. Is this correct?
asked by Emily 
Math
The room you want to paint has 2 doors,each 6.5 ft tall and covering 20.8 square ft.What is the width of each door? My answer is 3.2 ft,am i right?if not please explain.
asked by miki 
chemistry
What is the value of Kf for the formation of the ammine M(NH3)2+ ? Assume the concentration of M(NH3)n+ = 0.0020 M The data were graphed giving a straight line plot with an equation of y = 5.9484x  9.89. .
asked by Anonymous 
chemistry
I have two questions that I really don't understand. The first one is: A reaction proceeds with delta H=10kJ/mol. The energy of activation of the uncatalyzed reaction is 150kJ/mol, whereas it is 100kJ/mol for the uncatalyzed reaction. How many times
asked by kathryn 
Physics
A singly charged ion of unknown mass moves in a circle of radius 13.5 cm in a magnetic field of 2.9 T. The ion was accelerated through a potential difference of 3.0 kV before it entered the magnetic field. What is the mass of the ion? (hint: EPE=Vq=KE) kg
asked by Anonymous 
Chemistry
For A+2B 2C and Kc = 2.13 For 2C D and Kc = 0.254 Calculate the value of equilibrium contant for the reaction D A+2B I'm so sorry to bother anyone.. but am i only supposed to multiple 2.13 and 0.254 together in order to get the third value of Kc? That's
asked by Tracy 
math
Suppose the space needle in seattle washington casts a 220 ft shadow at the same time a nearby tourist cast a 2 foot shadow if the tourist is 5.5 feet tall how tall is the space needle
asked by help 
for ms.sue please answer
In 5 min, Peter completed 2 math problems. Yvonne says he did 3/5 of a problem each minute. Is she correct? Explain. Sorry I really didn't get my math homework.
asked by consquela 
Chem 2
Which of the following has the highest buffer capacity? A. 0.10M H2PO4/0.10M HPO4 2 B. 0.50M H2PO4/0.10M HPO4 2 C. 0.10M H2PO4/0.50M HPO4 2 D. 0.50M H2PO4/0.50M HPOr 2 E. They all have the same buffer capacity. Double checking I believe C is the
asked by Debbie 
Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect
asked by Katie 
chemistry
the value of ΔH° for the reaction of 2 C6H6 (l) + 15 O2 (g) = 12 CO2 + 6H20 is 6535 kJ. how many kJ of heat are released in the combustion of 16.0 g of C6H6 (l) ?
asked by Agnes 
math
Hank needs 3 quartes to play one video game each time. If he has 14 quarters, how many times can he play? Explain.
asked by consquela 
Algebra
A rectangle has width w and its length is 4 units longer than 2 times the width, or 2w + 4 . Write a polynomial for the area of the rectangle.
asked by John 
Precal
Find the length of side b to the nearest whole number if side a = 105, angle A = 65 degrees, and angle B = 37 degree.
asked by terry 
physics
What amount of heat is required to increase the temperature of 75.0 g of water from 22.3C to 36.1C? The specific heat of water is 4186 J/KgC.
asked by Anonymous 
chemistry
C2H4(g)+CO2(g)+H2O(g) interpret the equation in terms of relative numbers of moles,volumes of gas at STP,and masses of reactants and products.
asked by la la 
INTRODUCTION TO THE SHORT STORY, PART 1
In F. Scott Fitzgerald's story "Bernice Bobs Her Hair," we are very likely to A. decide that Bernice will never escape her dependent nature. B. think of both Marjorie and Bernice as painfully naïve. C. realize that Marjorie is sensitive to Bernice's
asked by abrahale 
trig
Q1: Prove cos^2t+4cost+4/cost+2=2sect+1/sect Q2: A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
asked by Katie 
Chemistry
A 0.035 M solution of a weak base has a pH of 10.88. What is the Kb for the acid? Where Di I even begun**???
asked by L.Bianchessi 
algebra 2
A pebble is tossed from the top of a cliff. The pebble's height in feet is given by y(t) = 16t2 + 6t + 200, where t is the time in seconds. Its horizontal distance in feet from the base of the cliff is given by d(t) = 5t. How far will the pebble be from
asked by Emily 
Dressmaking
as many alterations as possible should be made A)after sewing a garment B)on the pattern pieces C)immediately after cutting D)following the markings on the pattern pieces Im not sure if B or D is correct
asked by Ayesha 
Chemistry
Zn metal was allowed to react with hydrochloric acid to produce hyrdogen gas.This gave a total of 555mL of gas collected over water at 20C and a pressure of 747mm of Hg. How many moles of hydrogen were collected? The vapor pressure of water at 20C is 18mm
asked by Cynthia 
math
A rectangle has width w and its length is 4 units longer than 2 times the width, or 2w + 4 . Write a polynomial for the area of the rectangle.
asked by John 
Re post water in tanks problem
A./_\ B.\_/ C._ The three tanks shown above are filled with water to an equal depth. All the tanks have an equal height. Tank A has the greatest surface area at the bottom, tank B the least and tank C the middle. (Select TTrue, FFalse, GGreater than,
asked by Sasha 
Trig
A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
asked by Katie 
Physics
A singly charged positive ion has a mass of 3.20 1026 kg. After being accelerated from rest through a potential difference of 823 V, the ion enters a magnetic field of 0.820 T along a direction perpendicular to the direction of the field. Calculate the
asked by Anonymous 
algebra
f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and
asked by alyssa 
Physics
A mercury barometer reads 744 mm on the roof of a building and 769 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
asked by Jackie 
physics
If you stand next to a wall on a frictionless skateboard and push the wall with a force of 40N, how hard does the wall push on you ? If your mass is 80kg show that your acceleration is 0.5m/s^2
asked by kamish 
Chemistry
A solution containing Pb2+ and a solution containing IO3 are poured together and quickly mixed. After mixing, the solution contains 0.0030 M Pb2+ and 0.040 M IO3. Immediately Pb(IO3)2(s), which has Ksp=2.51013, begins to precipitate. Calculate the free
asked by Tanner 
Trig
Prove cos^2t+4cost+4/cost+2=2sect+1/sect
asked by Katie 
Physics
A particle is acted upon two forces given by the vector equations, F1=1.5i0.7j and F2=3.1i+3.6j, with values measured in Newtons(N). Calculate the resultant force, in N, acting on the particle, giving your answer to 3 dec places.
asked by Annoymous 
physics
A ball starts from rest and rolls down a hill with uniform acceleration, traveling 170 m during the second 5.5 s of its motion. How far did it roll during the first 5.5 s of motion? Express your answer using two significant figures. x= m
asked by aisha 
science
A 200mwide river flows due east at a uniform speed of 2.0 m/s. A boat with a speed of 8.0 m/s relative to the water leaves the south bank pointed in a direction west of north. What are the (a) magnitude and (b) direction of the boat’s velocity relative
asked by jaco 
Chemistry
Calculate the pH of a 5.90x103 M solution of H2SO4.
asked by Chris 
Math
Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four different digits to form a fourdigit number that is NOT divisible by 7. The digits 1238 cannot be arranged to create a fourdigit number that is divisible by 7. The digits 1389 also
asked by Please Please Help 
algebra
f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and
asked by alyssa 
math
Venietta read 4 books in 7 weeks. How many books did she read each week?
asked by consquela 
chapter 5: Ratios & Proportions
Out of the 248 seniors, 112 are boys. What is the ratio of boys to the total number of seniors?
asked by kaylah 
Statistics
A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about
asked by Lee 
Chemistry
If someone could please be kind enough to see me through this problem? Calculate the value of Kp for the equation C(s) + CO2(g) 2CO(g) Kp? Given that at a certain temperature.. C(s) + 2H2O(g) CO2(g) + 2H2(g) Kp1 = 3.03 and H2(g) + CO2(g) H2O(g) + CO(g) Kp2
asked by Tracy 
chemistry
What mass (in grams) of potassium acetate, KC2H3O2, must be added to 140 mL of 0.010 M acetic acid to form a buffer solution with a pH of 4.5? (Ka (HC2H3O2)= 1.8 x 105)
asked by Anonymous 
chemistry
If 29.0 mL of 0.10 M Ba(NO3)2 are added to 76.0 mL of 0.21 M Na2CO3, will BaCO3 precipitate? Calculate Q
asked by Tanner 
Trig
A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
asked by Katie 
science
The halflife of carbon 14 is 5730 years. if a 1 g sample of old carbon is 1/8 as radioactive as 1 g of a current sample, then the age of the old sample is about ___________years. 22,900 17,200 11,500 716
asked by chuck 
chemistry
the value of ΔH° for the reaction of 2 C6H6 (l) + 15 O2 (g) = 12 CO2 + 6H20 is 6535 kJ. how many kJ of heat are released in the combustion of 16.0 g of C6H6 (l) ?
asked by Agnes 
physics
A mercury barometer reads 744 mm on the roof of a building and 769 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
asked by Jackie 
Chemistry
Calculate the [H+], [OH ‾ ], and the pH of 0.16 M solutions of: hydroxylamine (HONH2, Kb = 1.1 108)
asked by Chris 
Chemistry
Using the van der Waals equation, determine the pressure of 436.0g of SO2(g) in a 7.30L vessel at 725k.? For SO2(g), a=6.865L^2•atm/mol^2 and b=0.05679L/mol. (R=0.0821L•atm/(K•mol))
asked by Cynthia 
American Government
Which statement does not accurately describe Committees on the Whole? 1.)It helps the House get around quorum requirements. 2.)It debates bills, offers amendments, votes, and passes them on to the entire House. 3.)It is a permanent fixture in Congress.
asked by Mackenzie 
Trigonometry
Liola drives 13 km up a hill that is at a grade of 10 Degrees what horizontal distance to the nearest tenth of kilometer has she covered
asked by :) 
Chemistry
Calculate the amount of heat transferred when 21.0 of CH3OH(g) is decomposed by this reaction at constant pressure.
asked by Brittany 
6th Grade History
in a.d 100's the roman empire surrounded what sea? Mediterranean Sea, Caspian Sea, Red Sea, or the Roman Empire was landlocked. I am not sure at all.... Please Help.
asked by running.from.myself 
geometry
What is the image of A(3,1) after a reflection, first across the line y=3, and then across the line x=1? I believe (3,1) but not real sure, doesn't the x stay the same?
asked by Brandon 
Trig
A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?
asked by Kathryn 
chemistry
An experiment was done to determine the formula and formation constant of a metal ammine. The data were graphed giving a straight line plot with an equation of y = 5.9484x  11.447. What is the correct forumla for this metal amine? M(NH3)2+ M(NH3)5+
asked by Anonymous 
physics
The human body can survive a negative acceleration trauma incident (sudden stop) if the magnitude of the acceleration is less than (m/s2) If you are in an automobile accident with an initial speed of 101(km/h) and are stopped by an airbag that inflates
asked by aisha 
English
Do you believe in love at first sight? Romeo and Juliet evidently did. The play covers the timespan of only a few days. In this short period of time, Romeo and Juliet fall in love so passionately that they are willing to die if they cannot be together.
asked by Teri 
Physics
A light ray in air is incident on a water surface at a 44° angle of incidence. Find each of the following angles. (b) the angle of refraction °
asked by DCM 
geometry
Marc is visiting washington dc he wants to know the height of the washington monument the length of the monument shadow is 111 feet long at the same time that marcs shadow is 1 foot long Marc is 5 feet tall using this data find the height of the monument
asked by :) 
chemistry
The kinds of interactions that exist between CH3COOH molecules include dipoledipole (including hydrogen bonding) interactions and London forces.True or False Its false there are no hydrogen bonds?
asked by krystal 
math
1writing to explain why might you need to measure a perimeter with a measuring tape instead of a ruler? 2how are a ruler, a yardstick , and a measuring tape the same? how are they different?
asked by jack 
Physics
A bicyclist traveling at 7 m/s rides around an unbanked curve. The coefficient of friction between the tires and the road is 0.38. What is the radius of the shortest turn that the bicyclist can safely make?
asked by Sarah 
Chemistry(Please check)
I completed a lab to find the determination of Kc. I have to find the concentrations of reactants at equilibrium using an ICE table. The equation that were are using is Fe^3+(aq) + SCN^(aq) > Fe(SCN)^2+(aq) I have to create 5 ICE tables because we used 5
asked by Hannah 
physics
Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.5 rad/s. The acceleration continues until t = 17 s, when the acceleration abruptly changes to 0 rad/s2. Through what
asked by Katie 
math
On each flight, an airplane is filled with 10 quarts of oil. The airline adds an additional (1/2) quart of oil for each planned hour of flying. Write an equation that can be used to determine the planned flying time, h , in hours, for an air plane filled
asked by Anonymous 
Trig
Prove (3cosθ4sinθ)^2+(4cosθ+3sinθ)^2=25
asked by Katie 
Health
The majority of alcohol in the blood stream is detoxified in the? A.heart B.liver C.kidneys D.brain I think it is D. I just need to know if the answer i chose is right.
asked by anonymous 
Math
The graph of f is shown. Apply Rolle's Theorem and find all values of c such that f '(c) = 0 at some point between the labeled intercepts. (Enter your answers as a commaseparated list.) f (x) = sin(2x)
asked by Reza 
trig
find the general solutions to the equations: 1) sec x = 2 2) 2 sin^2 x = 1 3) cos^2 x  2cos x + 1 = 0
asked by jenny 
math
CAN YOU PLEASE ANSWER MY QUESTION "MATH" AND "math".
asked by FOR MS. SUE consquela 
geometry
State a conclusion that seems reasonable. 6 + 0 = 6, 8 + 0 = 8, 9 + 0 = 9, 100 + 0 = 100. Conclusion:
asked by jasmine 
social studies
What is the difference between climate and weather?
asked by Nathaniel 
English
Try hard to succeed. (What is the part of speech of 'to succeed'? Is 'to succeed' the object of the verb 'try'? Or is 'to succeed' the adverbial phrase which modifies 'try'?)
asked by rfvv 
math
Determine the slope of a line passing through the points (2, 9) and (0.66, 9).
asked by bob 
algebra
A student opens a mathematics book to two facing pages. The product of the page number is 2352. Find the page numbers. The first page is__________ The secnd page is__________
asked by Mary 
Chem AP
Cytochrome, a complicated molecule that we will represent as CyFe2+, reacts with the air we breathe to supply energy required to synthesize adenosine triphosphate (ATP). At pH 7.0 the following reduction potentials pertain to this oxidation of CyFe2+:
asked by Radhika 
Algebra
give exact and approximate solutions to three decimal places. x^2+5x7=0
asked by Mary 
st xaviers
for the same value of an angle of an incidence of reflaction in three media A,B and C are 15 degree, 25 degree and 35degree respectively. in which medium would the velocity of light be menimum
asked by anupma 
Calculus I
Show that the equation x^4 + 4x + c = 0 has at most two real roots. I believe we're supposed to prove this by proof of contradiction using Rolle's Theorem, but I'm not quite sure how to do this problem.
asked by Emily 
life orientation
three checks and balances that are in place in south africa that control and regulate media
asked by koketso 
6th Grade History: Writeteacher
On my question earlier; What does "on the landward side" mean? A) away from the volcano B) toward the volcano C) on the far side of the bay D) on the sea floor there was not a picture or anything like that. What would you say it is? A or B
asked by running.from.myself 
Chemistry
At 389K, this reaction has a Kc value of 0.0682. 2X(g) + 2Y(g) Z(g) .. Calculate Kp at 389K. Kp= this is what I did.. can somebody confirm or find any mistakes in my thought process? Kp = Kc(R)(T)^Delta n Delta n = (1)(2+2) = 3 Kp =
asked by Tracy 
physics
When you roll a ball off the edge of a table, the component of velocity that doesn't change as it falls is the ____________________. A) None of these.B) vertical component.C) horizontal component.D) resultant.
asked by jim 
Math
Two hundred four students go to after school care at Ming's school. The students are divided into 12 equal groups. Six groups play on the playground while 6 gropus work on their homework. What is the greatest number of students that play on the playground
asked by Colton 
algebra2
simplify the following quotient of complex numbers into the form of a+bi 9+8i/1+2i
asked by melba 
Calculus
Find the orthoganal trajectories of the family. Use a graphing utility to graph several members of each family. y = Ce^x What am I supposed to do here? Can someone point me in the right direction?
asked by Hannah 
English
Thank you for helping me find a suitable topic for my reading comprehension. I included an extra exercise I would like you to check. 1) Answer these questions with either true or false. Then correct the false statements. a. Clark felt embarrassed because
asked by Henry 
chemistry
Liquid nitrogenpowered car students at the university of north Texas and the university of Washington built a car propelled by compressed nitrogen gas. The gas was obtained by boiling liquid nitrogen stored in a 185.0 L tank what volume of N2 is released
asked by Alex 
Physics
Sunlight strikes a fused quartz surface. At what angle of incidence is the reflected light completely polarized?
asked by DCM 
calculus
Find the volume of the solid S that satisfies the two following conditions. First, the base of S is the elliptical region with boundary curve 9 x2 + 4 y2 = 36, and second, the crosssections of S perpendicular to the xaxis are isosceles right triangles
asked by Kara 
English
In the book Frankenstein, the monster reads three books that he found in the forest. He learned about life from these books. My assignment is to come up with my one three books and explain why these would be important and what kind of lessons the monster
asked by Katie 
Chemistry
How many liters of hydrogen gas can be made from 65.5g of magnesium at STP? Magnesium reacts to sulfric acid according to this equation... Mg+H2SO4>MgSO4+H2
asked by Cynthia 
AVSC
Consider the lowspeed flight of the Space Shuttle as it is nearing a landing. If the air pressure and temperature of the shuttle are 1.2 atm and 300 K, respectively, what is the air density? Note: 1 atm = 101325 N/m^2. Hint: Use ideal gas law!
asked by Terri 
Physics
Take the radius of the earth at the equator to be 6380 km a. Find the speed the speed of an object at the equator due to the earth's rotation. ___m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour
asked by Sam 
American Government
Which statement is false? 1.)Most bills may originate in either house of Congress. 2.)To introduce a bill in the house, a representative drops a copy of the bill into a box called the hopper. 3.)After a bill is introduced, it can sit for weeks at a time
asked by Mackenzie 
6th Grade History
What does "on the landward side" mean? A) away from the volcano B) toward the volcano C) on the far side of the bay D) on the sea floor my answer: d) on the sea floor. Am I correct? Thanks for all and any help in advance.
asked by running.from.myself 
Gemotry
On a sunny day object a has a shadow of length 3 meters and a meter stick has a shadow of 1.5 meters while object b has a shadow of length 6 meter how tall are object a & B
asked by ahh help 
chemistry
Concentrated acetic acid, HC2H3O2 is 17.4 M. How many mL of concentrated acetic acid do you need to prepare 125 mL of a 0.150 M solution of acetic acid?
asked by Anonymous 
TO MS.SUE
now check this. THERE ONCE WAS A CLASS NAMED 210 THEY KEPT TALKING AND TALKING AGAIN MRS.BESDEN CAME INSIDE AND ALL THEIR EYES WERE OPENED WIDE AND THERE WAS SILENCE THEN
asked by Celest 
Chemistry
I wanted to calculate the average equivalent weight of an unknown acid for an acidbase titration experiment. The mass of the unknown that I had to obtain is 0.2 g and the equivalents of the acid is .001046 L x N. But is this equation right? Does the
asked by Priscilla 
precal
5 t values used to graph (called key pts or inflection pts) and primary cycle? 1) y=2sin(xpi) 2) y=sin3x2 3) 3cos(1/2x+pi/3)+1 4) cospi(x1)
asked by Kim 
statistics
The average middledistance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute. Find the percentage of a runners that will run the mile in less than 4 minutes?
asked by dw 
math
the three angle of trapezium are 110°,50°,and40°.find its fourth angle
asked by shubhang sharma 
geometry
by what factor must the radius of a circle be multiplied to make the area of the cicle 3 times as large?
asked by Anonymous 
physics
a motorized scooter starts from rest and accelerates for 4 s at 2 m/s2. it continues at a constant speed for 6 s . What is the scooter's average velocity for the interval 04 s ?
asked by blue 
English
Writeacher, I urgently need you to check these questions (and improve them). I need to prepare them for tomorrow. 1) Describe how Robinson keeps himself busy on the island before meeting Friday.How does he maintain an idea contact with his motherland? 2)
asked by Henry 
gemotry
On a sunny day object A has a shadow of length 3 meters and a meter stick has a shadow 1.5 meters while object b has a shadow of length 6 meters how tall is object A AND B
asked by :) 
geometry
Mr. Smith built a fence around a piece of land he wons. The piece of land is 30 yards long and 12 yards wide. How may feet of fencing did Mr. Smith use to build the fence?
asked by Adam 
Math
hello i need help for derivative: ( sin x ) / ( cos x ) thanks for your help
asked by Tom 
Bus
Write a 1,050word paper, explaining the concept of environmental accounting. Select an organization with which you are familiar, such as a past or current employer. Select one of the following environmental accounting applications: „h Budgeting „h
asked by janoah 
6th Grade History
1. What was the importance of the Dead Sea Scrolls and according to them who was to survive? 2. How did John the Baptist convert people? I will post my answers in just a sec.
asked by running.from.myself 
Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a
asked by Tracy 
simple math question
who is bigger 0.03 or 0?
asked by Kylie 
Algebra
Consider the following apportionment problem for College Town. Suppose each council member is to represent approximately 2,500 citizens. Use the apportionment plan requested in the problem, assuming there must be 10 representatives. North: 5,500 South:
asked by Anonymous 
math
In the number 268,743, how many times greater than the 3 is the 6?
asked by g 
algebra
f the distance the car traveled after applying the brakes equals 20 feet, what does that mean to the officer investigating the accident? (HINT: Let d = 20, bring 20 to the right so that the equation equals zero, identify the coefficients, A, B and C and
asked by alyssa 
English
Writeacher, could you please check the very last things. It's really late here and I need to go to bed. Thank you. 1) Unfortunately, we have just sent in our Comenius proposal for a science project on biodiversity in water with both a German and a French
asked by Henry 
Science
If a resting individual has a heart rate of 70 beats per minute and a cardiac output of 5.25 liters, then what is that individual's stroke volume?
asked by Sammie R 
Chemistry
A gaseous reaction occurs at a constant pressure of 50.0 atm and releases 69.8 kJ of heat. Before the reaction, the volume of the system was 8.80 L . After the reaction, the volume of the system was 2.80 L . Calculate the total internal energy change,
asked by Brittany 
American Government
A _____ can only be ended with _____. 1.)cloture, filibuster 2.)cloture, debate 3.)filibuster, cloture 4.)filibuster, an amendment
asked by Mackenzie 
English
Writeacher, I need you to check these sentences to be transformed into the passive. (the last two examples don't belong to the same exercise). I'm also looking for a short reading comprehension to be included in a test designed for preintermediate EFL
asked by Henry 
chemistry
287 mL of a 2.93 m solution of sodium bicarbonate reacts with iron (II) phosphate. How many moles of iron (II) bicarbonate are formed?
asked by Victoria 
Trig
prove sin(α+β)sin(αβ)=cos^2βcos^2α please help... this is the only one I didn't understand out of all my homework...
asked by Katie 
geometry
A prism has a right triangle as its base with a hypotenuse that measures 15 meters and legs that measure 9 meters and 12 meters. What is the surface area of this prism if the height of the prism is 11 meters?
asked by Anonymous 
Physics
Take the radius of the earth at the equator to be 6380 km a. Find the speed the speed of an object at the equator due to the earth's rotation. ___m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour
asked by Kelly 
geometry
A triangle has sides x,x+7 , x+ 8. The value of x must fall between what boundaries to make this an obtuse triangle?
asked by It 
CRJ
what are some of the benefits and dangers of police work?
asked by meshelle 
Algebra
The profit made from the sale of tiles is found by subtracting the costs from the revenue. (This is the money you take in minus the money you spent.) g. Find the Profit Equation by substituting your equations for R and C in the equation . Simplify the
asked by Fred 
math
How do you show this as a unit rate 360 jars in 18 cases I'm in sixth grade and need help now!!!!!!!!!!
asked by Britnie 
Math
6x3y = 6 and 5x + 7y = 41 I got stuck on this problem and my answers are outrageous so please help?
asked by Andres 
Calculus
Determine the point on the curve y^2=4x that is closest to the point (1,0) a) (0,0) b) (1,2) c) (0.5,sqrt of 2)
asked by Jessica 
Math
What is 11 times 4\9 times 1\4 ?
asked by Jada Lee 
math
david wants to buy a motorcycle for2500. He has no money in his savings. He gets a job where he earns $50 an hour. how many 8 hour work days will it take to reach his goal of 2500? Must write an equation to represent the situation then solve and explain.
asked by sam 
math
what is the probability of picking a yellow marble out of a jar of 27 marbles, if 20 of the 27 marbles are green?
asked by earl 
statistics
1. The average number of articles produced by two machines per day is 200 and 250 with standard deviation 20 and 25 respectively on the basis of records of 25 days production. Can you regard both the machines equally efficient at 1% level of significance?
asked by lokesh 
SpanishSraJMcGinPlease recheck
When I said the realizar in my earlier post, I was trying to ask if she liked to see them performI thought realizar was to perform which obviously it wasn't. If possible could you tell me what "to perform" would be in Spanish Thank you again for checking
asked by Mia 
math
Choose the statement that correctly lists equivalent ratios. A. 1 : 6 = 20 : 120 = 5 : 30 B. 1 : 6 = 4 : 18 = 6 : 36 C. 1 : 8 = 20 : 120 = 3 : 24 D. 1 : 8 = 3 : 32 = 5 : 48
asked by Anonymous 
algebra
grandma ploan to finance her grandchilds college education she has 50,000 to invest use a long range investment pln ,cd,saving bond etc. the plan is to earn compound interest.the principal is(p)50,000 interest rate is (r)3.60years for investment is(6)this
asked by mike 
Chemistry Help Please!!
How can you precipitate BaCrO4(s) from a solution of barium nitrate and potassium dichromate? I don't get it.. it's a question from a lab we did on chromatedichromate equilibrium.
asked by Chem Student 
CHEMISTRY!!!!
Write two reactions for NaHCO3, reacting with water in one NaHCO3 is acting as acid the other as a base. Is 0.10M solution going to be acidic or basic? Explain. I write the two rxns but what do I do with then...
asked by L.Bianchessi 
physics
a construction wo4rker uses a board and log as a lever to lift a heavy rock. If the input arm is 3 meters long and the output arm is 0.75 meters long, what is the mechanical advantage of the lever?
asked by Kayleigh 
English
Writeacher, I included a few sentences for you to check. I wonder if you coud help me organize my ideas more clearly. 1) Winston is tortoured by the Thoughtpolice and threatened that he will be attacked by rats, the thing which he hates most. 2) They make
asked by Henry 
Calculus
What values of x is there an absolute minimum for the function y= 1/3x^2 + 2x? I found the derivative of the function which is y'=2/3x + 2 set it to 0=y'=2/3x + 2 x=3 What do I do now?
asked by Jessica 
chemistry
the aciddissociation constanstant for acetic acid CH3COOH(aq)H+(aq)+CH3COO(aq) is known to be 1.8X10^5 at 25C Caclulate G0f forCH3COO(aq). G0f=396.56KJ/mol for CH3COOH (aq), 0 Kj/mol for H+ explain your answer
asked by o 
science
In the fissioning of uranium, a chain reaction is caused by? ejected neutrons. the enormous energy release. the kinetic energy of the decay products. the conversion of mass to energy.
asked by Frank 
astronomy
What is theratio of the luminosity per aquare meter coming from a part of the Sun that is 5800 K versus a sunspot where the temperature is 5000 K?
asked by Linda 
LIMERICK
I need you to help me check this, please. The Noisy Classroom By:Celest Declaint There once was a classroom named 210 They kept talking and talking again _____________________ ______________________ ______________________ ______________________ i need help
asked by Celest 
Physics
A spotlight on a boat is y = 2.6 m above the water, and the light strikes the water at a point that is x = 8.6 m horizontally displaced from the spotlight. The depth of the water is 4.0 m. Determine the distance d, which locates the point where the light
asked by DCM 
mathq
Please show me how to work this. A park has two walking paths shaped like right triangles. The first path has legs 75 yd and 100 yd long. the second path has legs 50 yd and 240 yd long. What is the total length of the shorter path, in yards?
asked by Jane 
Writing
What better time to kiss the Blarney Stone than March! Help your readers plan a trip to Ireland by writing a travel article with interesting facts about the country My Facts: Want a trip to Ireland? Well you should go because there is a lor of amazing
asked by Colton 
Chemistry
You are a lab technician and must create 250 ml of a 17% salt solution. You have available three stock solutions. You have a one liter container of a 5% salt, a 500 ml container of a 28% salt solution, and a 400 ml container of a 40% salt solution. Discuss
asked by Fatih 
Algebra
3x^23x8
asked by Erina 
Calc
Find the volume formed by rotating the region enclosed by: x = 8 y and y3 = x with y ≥ 0 about the yaxis
asked by Cait 
Math
The monthly car payments for Ted Nelson's last eight customers were $266, $285, $285, $285, $285, $315, $325, and $344. Decide whether the mode represents these data well. Explain. Please help, I think yes, because it has a mode and it makes up half of the
asked by Catherine 
Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a
asked by Tracy 
Math
The graph of f is shown. Apply Rolle's Theorem and find all values of c such that f '(c) = 0 at some point between the labeled intercepts. (Enter your answers as a commaseparated list.) f (x) = x^2 + 6x − 7
asked by Reza 
SpanishHelp
We learned different timeframes in We learned timeframes in Spanish today and I'm stuck with my homework.Please check 1.Yo pedí un taco el restaurante anteayer. I ate a taco in the restaurant the day before yesterday. 2.Bebí un batido en el Mexican
asked by Toby 
Trigonometry
Find the angle of elevation of the sun when a tree that is 10 yd tall cast a shadow 14 yds long
asked by :) 
math
Mr.River is driving from Hillsford to Dryden. The distance between the 2 towns is 1715 miles. Mr.River has already driven 580 miles. Which is the best estimate of how much farther he must drive in order to reach Dryden? A.2300miles B.1200miles C.1100miles
asked by Colton 
buisness
◦Summarize what you learned in this Orientation Workshop. ◦How will you apply what you learned in this Orientation Workshop to your educational, personal, or professional pursuits?
asked by Anonymous 
MaTH
Simplify the following: 1) 32^1.2 2) (216)^(2/3) 3) (27)^(4/3) Note: 32^1.2 is 32 raised to the 1.2 power
asked by Cheyanne 
Accounting
DATA: The 2011 employee performance bonus will be $10 mil. The bonus is paid in March of 2012 is $9 mil The 2012 employee performance bonus will be $12 mil. The bonus is paid in March of 2013 Exercise: What is the monthly accrual amount? What account is
asked by davve 
Chemistry
Calculate the pH of an aqueous solution containing 3.8 102 M HCl, 1.0 102 M H2SO4, and 3.3 102 M HCN.
asked by Ashley 
chemistry
287 mL of a 2.93 m solution of sodium bicarbonate reacts with iron (II) phosphate. How many moles of iron (II) bicarbonate are formed?
asked by Victoria 
Trig
prove sin(α+β)sin(αβ)=cos^2βcos^2α
asked by K.T. 
Human Relations
I would like to learn more about having "undue confidence" by creating examples. I understand that this term is related to selfsufficient.
asked by Alex L. 
INTRODUCTION TO THE SHORT STORY, PART 1
During what part of "Bernice Bobs Her Hair" does Bernice cut Marjorie's braids?
asked by abrahale 
math 2nd grade
what is 3/5 of 10? what is 1/3 of 12?
asked by ashley 
geom/trig
A 40 ft ladder leans against a wall so the base of the ladder is 11 feet away from the base of the wall . What angle does the ladder make with the wall?
asked by Tom 
Math
6x3y = 6 and 5x + 7y = 41
asked by Andres 
physics
An electron in a cathoderaytube (CRT) accelerates from 20300 m/s to 3.99 × 106 m/s over 1.34 cm. How long does the electron take to travel this distance?
asked by anmol 
bus 599
A group of economics students gathered to study for a test on the money and banking system in the U.S. During a fast and furious brainstorm session, Jill scribbled down several key phrases she will use to study tomorrow. Unfortunately, in her haste, all
asked by Anonymous 
precalc!!!!!
Let f(x)=3x4x^2 Find f o f o f So... F(f(x)) I got a really big answer..... I think I might have done something wrong when doing the distributing algebraic work.
asked by L.Bianchessi 
precalc!!!!!
Let f(x)=3x4x^2 Find f o f o f So... F(f(x)) I got a really big answer..... I think I might have done something wrong when doing the distributing algebraic work.
asked by L.Bianchessi 
English
I'm looking for a short summary of The Great Gatsby that is just a few sentences, but I can only find long ones!
asked by Katie 
7th grade math
My friend is in the 7th grade and broke his wrist so he cannot type. Wat is the square root of pi.He said he knows pi=3.14 but he doesn't know how to work it out. He said thanks.
asked by running.from.myself 
Math
The sum of the lengths of the sides of triangle ABC is 38in. The length of sides AB and BC are 14 inches and 11 inches. Find the length of side AC and classify the triangle.
asked by Elaina 
Math
Hello I need help for derivative this function: ( x²  3x + 2) / ( x² + x + 4 ) Thanks for your help .
asked by Sébastien 
astronomy
How fast must a spaceship travel to reachthe center of the Galaxy (26,000 ly away) in 100 years "ship time"?
asked by Linda 
Chemistry
I had to make a graph using lnK vs 1/T and find the slope. The slope was 1.23e4 and now I have to find Ea. Do I divide the slope by R?
asked by Hannah 
SpanishSraJMcGinplease check
I had to write a conversation about going to the circusI'm not sure if this is correct Me:¿Te gusta ir al circo? Emily: Sí, El circo es muy divertido. ¿Y tú? Andrew: Sí. Yo también. El circo es divertido. Emily: ¿Cuál es su cosa favorita en el
asked by Mia 
algebra
8r+7r=75
asked by sarah 
history
Both the Puritans and William Penn viewed their colonies as “holy experiments.” How Did they differ?
asked by ljessie 
math
a door was 6ft10in tall and 2ft 11in wid. estmate the area of one of the door
asked by leeann 
English
I need help writing a short story with these vocab words. 1. Discredit 2. disdain 3. Divergent 4. empathy 5. emulate 6. enervating 7. enhance 8. ephemeral 9. evanescent 10. exasperation
asked by Anonymous 
Math
SIMPLIFY 1.(3+√2)/√2 2. 4/(1+√3) 3.(3+√5)(12√5) 4.(3+√8)/((2√3)4)
asked by Leslie 
Calculus
Determine the absolute extreme values of f(x)=4√x 2x on the interval [1,4] I found the derivative of f(x)=4√x 2x f'(x)=2/x^(1/2)  2  I have no idea what to do now.
asked by Jessica 
science
which of the following is a physical change? Milk becomes sour An iron nails rusts All the water in a solution of salt water evaporates leaving a lot of crystals of salt in the bottom of the dish A wooden log is burned leaving ash in the fireplace
asked by Mary 
math
i need help here is the question. Leena bought 93 yards of wire. How many of wire did she buy
asked by jorge 
MATH
A name tag is 6.7 centimeters long. How many meters long is it
asked by jorge 
Math
What two numbers when multiplied = 16 and when added = 10, also one number is negative the other is positive in this answer.
asked by Jquez 
Irish history
Please help me unscramble the following letters pertaining to Irish. NLPCREEAH tHANK YOU fRANCES
asked by Frances 
Physics
Take the radius of the earth's orbit to be 1.5 x 1011 m. a. Using a year to be 365 days, find the speed of the earth as it moves around the sun. __m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour
asked by Kelly 
algebra
Use the following to answer the next three questions: the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the
asked by alyssa 
algebra
Use the following to answer the next three questions: the height, h, of a ball t seconds after it is released for a jump shot in a basketball game can be modeled with the equation h = −16t2 + 12t + 8. The rim of the basket is 10 feet high. Which of the
asked by alyssa 
Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at 3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely? Each gram of water will
asked by Tracy 
Chemistry
You are a lab technician and mix with water in order to create 250 ml of a 17% saltsolution. Discuss and explain the sources of error that may be occurring in creating the mixtures.
asked by Fatih 
Chemistry
After taking a medication its concentration in the bloodstream behaves as shown in the graph 650t/(t^3+200), where the x values are hours since first taking the medication and y is the concentration of the medication (mg/cc) in the blood stream after the
asked by Fatih 
English
I left out a few other things I would like to include in an email. Thank you very much. 1) Unfortunately, we have just sent in our Comenius proposal for a science project on biodiversity in water with a German and a French school. 2) However,being an
asked by Henry 
Math Lit
It takes 6hours to paint a bedroom a) How long would it take 2 men? B)how long would it take 4men? C)how long with it take 12men? Please show me the calculates to see how you get the answer
asked by Timi 
Chemistry
After taking a medication its concentration in the bloodstream behaves as shown in the graph 650x/(x^3+200), where the x values are hours since first taking the medication and y is the concentration of the medication (mg/cc) in the blood stream after the
asked by Fatih 
Algebra 2
(x^3+8) x ((x2)/(x^22x+4))/ (x^24)/(x6)
asked by Darren 
MATH
3 divided by 7 turned into a fraction and 4 divided by 9 turned into a fraction and 1 divided by 5 turned into a fraction
asked by consquela 
Englishb
What are some books that could instruct someone on the world we live in?
asked by Katie 
geometry
If you have a room that is 250 square inches and you are wanting to cover the floor using 5inx8in tiles how many tiles would it take?
asked by corena 
Chemistry
If the time elapsed is 4.26 min, what is the value of the rate constant, k? ln[R]t / [R]o = 0.0237 I am not sure how to slove this. Is Rt 4.26 min?
asked by Hannah 
Math
There are 10 marbles in a bag. 5 blue, 3 red and 2 green. If you draw 1 marble at random, What are the odds in favor of drawing a red marble? Is the answer 3/10 or 3/7 ???
asked by Anonymous 
chemistry
if initial pressure is 5 atm, initial volume is 6 liter what will be final pressure in atm when final volume is 10 lit?
asked by Anonymous 
Excel Graphs
i'm having trouble getting my graph to come out right in the legend its posting everythin and only need 2 mts to show up how can i fix it
asked by Linda 
Math 116
what are the answers to week seven checkpoint?
asked by lbanks 
Managerial Accounting 2025
The company applies manufacturing overhead on the basis of machinehours. The predetermined overhead rate is $10 per machinehour. Compute the unit product cost that would appear on the job cost sheet for this job.
asked by Debbie McDonald 
geomatry
I need to creat a parallogram,rectangle,square,rhombus,kite and triangle all should have the same area?
asked by manal HELP ME 
math
Hello, I need help finding the intersection points B and C of the tangent A with for horizontal axis B and the vertical axis C. hyperbola: f (x) = 1 / x A = (1, 1) Thanks for your help .
asked by Sébastien 
math
How do I draw a reflex angle ZYX so that it measures 255 degrees?
asked by Avery 
Math
Thomas is planning on redoing his bathroom floor with tiles measuring 5in by 8in. The floor has an area of 205in square. What is the least number of tiles he will need? I can't not figure this out, can someone please help?
asked by Kaylon 
geometry
There are six marbles in the bag and three of them are purple, three of them are black.
asked by jasmine 
trig
if sin 7x = cos x+10 find the value of x
asked by Anonymous 
math
1 writing to explain why might you need to measure a perimeter with a measuring tape instead of a ruler? 2 how are a ruler, a yardstick, and a measuring tape the same? how are they different? i don't 1 answer and i try 2 answer please check is it right
asked by jack 
Psychology
According to Howard independent intelligence:
asked by Jane 
Chemistry
Calculate the pH of a 5.90 103 M solution of H2SO4 I have tried doing this as pH=log[H+] and also by multiplying the Molarity by two because there are two hydrogens and then doing the log but both ways have gotten me the wrong answer is there something
asked by Ashley 
MATH
TO BUILD A SHELF NDS A BOARD 2 YARDS HAS A BOARD THAT IS 66INCHED LONG. HOW MUCH LONGERR OF A BOARD SHOULD HE USE TO BUILD THE SHELF?
asked by ABBIE 
HSPA REVIEW
Clue 1: I am a Real Number whose value is less than 1 Clue 2: I do not end Clue 3: My digits do not repeat. what kind of number am i?
asked by MELANIE 
science
What is broken up into about 30 sections that move around on the asthenosphere? I'm stuck between plates, crust, and lithosphere. Thanks!
asked by Victoria 
Physics
It takes 1110 calories of energy to melt a 185 gram lump of lead. What is lead's latent heat of fusion?
asked by Tracy 
science
Are there hydgrogen bonds between water molecules in the liquid phase No, and if there were, the water would just be ice (a solid). Yes, and they are continually breaking and reforming. Yes, but they rarely ocuur. No, otherwise the water molecules would
asked by Adam 
calculus
consider the integral [cos(x^3)dx,0,0.5]. Approximating it by the Midpoint Rule with n equal subintervals, give an estimate for n which guarantees that the error is bounded by 1/10^4
asked by ryan 
for ms.sue please answer
Explain how you know that 7 divided by 9 is less than 1.
asked by consquela 
education
According to Leeds, at snack time, children should be given ___ of each food for each year of their lives.
asked by Anonymous 
math
Whst is the elapsed time for 9:59 p.m. to 10:45 p.m.
asked by shion 
Math; PLEASE HELP
Solve for x. Provide an explanation, please. X^2+36=0
asked by Mari 
Trig
prove sin(α+β)sin(αβ)=cos^2βcos^2α
asked by Kathryn 
finance
Templeton Extended Care Facilities, INC. is considering the acquisition of a chain of cemeteries for $370 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will be able to borrow the
asked by kendall 
math
it takes dan 25 min. to walk to work. if he arrived at work at 6:40a.m when did he leave his house?
asked by Anonymous 
marketing
a 1,400 to 1,750word paper in which you describe the elements of the marketing mix (product, place, price, and promotion). Use at least 3 academic sources (nonacademic sources or text materials will not be counted) to support your work. In addition,
asked by nat 
life orientation
3 checks and balances that are place in south africa that control and regulate media
asked by kamogelo 
geometry
how long is a stage that is 6 meters wide with an area of 48 sq meters?
asked by dylan 
English
I left out a few last things I need to prepare. Thank you. 1) Who is Caliban? How did Caliban behave towards Prospero when he first arrived on the island? Does he regret his behaviour now? What does he wish? Caliban is the witch Sykorax’s son, a strange
asked by Henry 
theory to practice
can i get answer for test 40553400
asked by Anonymous 
Chemistry.
If 6.02 moles of potassium react with a 0.8 M silver acetate solution, how many L of silver acetate are needed?
asked by Victoria 
6th Grade History
What was Jesus arrested and crucified for?
asked by running.from.myself 
Chemistry.
If 6.02 moles of potassium react with a 0.8 M silver acetate solution, how many L of silver acetate are needed?
asked by Victoria 
math (Ms.Sue)
your room has 2 windows.Each window occupies 11.76 square ft of wall space.if the windows are each 2.8 ft wide,how tall is each window? my answer is 4.2 ft,am i right? if not tell why.
asked by miki 
math
Circular pool has a radius of 8ft. What is the longest distance a swimmer can swim without making a turn?
asked by crystal 
statistics
A continuously running washing machine receives jolts in a Poisson process at an average rate of 10 jolts per hour. The standard deviation of the number of jolts received in given 20 minute run is equal to
asked by Vijay 
HUM 111
Identify three approaches you will use to apply these techniques to effective writing and speaking skills.
asked by Lynn 
math
1. Suppose you are the owner of a tile company who purchases tiles from a supplier at a rate of $5 each. a. The variable cost is the cost that depends on the quantity, such as how many tiles are purchased. If you buy 100 tiles at $5 each, how much have you
asked by Fred 
College Physics
A 26.5 kg block (m1) is on a horizontal surface, connected to a 6.90 kg block (m2) by a massless string. The frictionless pulley has a radius R = 0.096 m and a moment of inertia I=0.080 kgm2 m2 is hanging straight down from the pulley over the edge of the
asked by Anonymous 
science
A 5kg object is resting on top of a 30m building. How much energy does the object have?
asked by James 
ENGLISH
could someone define and give an example of parenthetical citation
asked by JIM 
calculus
limx0 xsinx/xcube
asked by assignment 
History American Indians
I've been trying to do this homework problem for hours, and I am very confused on where I should start. Can I please receive some help. I am suppose to characterize the positions of assimilation, acculturation and cultural pluralism. I thought they were
asked by Svetlana 
chemistry
what is the balanced equation of ascorbic acid + citric acid +OH> water + ascorbate ion+ citrate ion
asked by Anonymous 
natural science
What is reproduction? What is pollination? What is fertilazation?
asked by omphemetse 
English
Sentence with: Locomotive revolting caricaturist contraband
asked by Amanda 
University Physics
Building A and Building B are 30m away from each other, on the 4th floor; 35m high, someone has set up a slingshot from the window on the 4th floor of building A and is trying to sling a balloon into the window directly across from them in building B. the
asked by Britt 
English
Thank you very much! Just one more thing. Should I evaluate the following sentence a mistake? 1) The journalist asked where I was going to sing ...... (istead of "asked me") The officer asked if I could show him my permit (instead of "asked me£) Thank you
asked by Henry 
Maths
find s given that v= 20, a= 10, u= 10 and v squared= u squared =2*a*s
asked by M 
Algebra
Suppose your tile company spends $ 195 each month, regardless of how many tiles are purchased as supplies. How much do you spend if you purchase 1000 tiles this month, taking into account this fixed cost? c. What is a possible reason for this fixed cost?
asked by Fred 
algebra 2
evaluate f(x) = x^2/3 + x^3 for each value of x. f(8)
asked by k 
Math
I Have to answer the game, "what's my rule" I've tried everything. I do not know if the teacher made a mistake in the problem. When x=1, y=3 x=2, y=6 x=3,y=12 x=4, y=24 I see that Y is doubling, but I need a rule to use with variable Thanks!
asked by Scott 
Statistics
A 82% confidence interval for a sampling distribution with a mean of 100, a sample standard deviation of 24 and a sample size of 36 will be based on a á= ______ and a corresponding Zá of ___
asked by Jeff 
Statistics
A 82% confidence interval for a sampling distribution with a mean of 100, a sample standard deviation of 24 and a sample size of 36 will be based on a á= ______ and a corresponding Zá of ___
asked by Jeff 
Chemical kinetics (chemistry)
if the activation energy is larger from the perspective of the reactants than the products, the reaction is ?
asked by Rose Bud 
Maths
Find 8 terms of the arithmetic progression if the second term is 2 and the sixth term is 5
asked by Great 
Chemistry
It is possible, although less accurate, to do a standard addition with only one sample. An unknown Fe sample was analyzed by AAS and gave an absorbance reading of 0.160. To the same sample we added 1.5ppm Fe and the new absorbance reading was 0.205.
asked by Mae 
arithmetic
a board 2 yards long. If 6 inches from one end was cut off. How many inches long was the shelf.
asked by Betty 
speech
Concerning dictionaries and their proper use, which one of the following statements is most accurate?
asked by janeth 
business law
A purchaser who is injured by a product has a cause of action by demonstrating all of the following are true except one. The exception is:
asked by Libra 
Chemical kinetics (theory)
Explain why a dust is much more explosive than is a stalk of grain.
asked by Rose Bud 
Chemistry
It is possible, although less accurate, to do a standard addition with only one sample. An unknown Fe sample was analyzed by AAS and gave an absorbance reading of 0.160. To the same sample we added 1.5ppm Fe and the new absorbance reading was 0.205.
asked by Ella 
geography
discuss the nature of economic geography.
asked by asnelia 
Trig
Prove sin(α+β)sin(αβ)=cos^2βcos^2α
asked by Katie 
kilakila secondary
convert and write in hindu arabic numerals
asked by karoline.ila 
Math
I'm in 5th grade and here's my question: I have to write which fraction represents the ratio of corresponding sides? There are 2 triangles. One triangle has the measurements 3in., 9in. and 6in. The other triangle is 18in., 54in. and 36in. Thank you.
asked by Isabelle 
to ms.sue
what should i name my limerick?
asked by Celest 
Physics
An audible standing wave is produced when air is blown across a pipe that is open at both ends. If the pipe is 29 cm tall, what is the frequency of sound produced?
asked by T 
algebra
factor monomial 64xcubic27
asked by Sandra 
world cultures
i need help on knowing that the cultural changes between Umayyad and Abbasid. pleaseee! thank you
asked by lauren 
6th Grade History
What is the crucifixion?
asked by running.from.myself 
physics
A rocket carrying a satellite is accelerating straight up from the earth's surface. At 1.25 s after liftoff, the rocket clears the top of its launch platform, 69 m above the ground. After an additional 4.80 s , it is 1.00 km above the ground. Calculate the
asked by aisha 
math
Mr lopez is putting a fence around his vegetable garden the garden is shaped like a rectangle. the larger sides are 14 feet long.and the shorter sides are 9 1/2 feet long how much fencing should mr lopez buy?
asked by luz 
English
I have an epal. (In this sentence, what does 'e' refer to? 'Pal' means 'friend.')
asked by rfvv 
chemistry
Give the concentration in meters when 3.51 moles of HNO3 are dissolved in enough water to make 1.2 liters of solution
asked by Evan 
math
Hello I have two questions pleae (1)what does it mean when it says measurement to an 8th of an inch, what will I be doing? (2) can you show me the steps for 10 inches = ________ ft, the answr is 5/6 but how do you get that? Thank you
asked by Patrizia 
Math
Which rectangle below has a perimeter 34 centimeters and area of 60 sqare centimeters
asked by Jamel 
English
i doing mobile (toy thing) for story sound of hollyhock. it have three string and each string be on different theme. one theme be mental illness, family problem, i not know what other theme be.
asked by Mohammad 
social studies
What are two ways the southeast and southwest cultural regions are similar and different?
asked by anoymous 
Science
good morning. i am looking for a science fair project for my son who is in kindergarten.
asked by Darnell 
Trig
Prove sin(α+β)sin(αβ)=cos^2βcos^2α
asked by Katie 
Heat Transfer
Air flows along a 1 m long plate. If the temperature of flow is 0 deg Celsius and the surface temperature of plate is maintained at 30 deg Celsius. Evaluate the heat flow from the plate to air. What are the maximum thickness of the velocity boundary layer
asked by Farant 
Math
Cindy is making labels for CDs. The diameter of each CD is 12 inches. In order to find the area of the label, Cindy needs to determine the radius. How can Cindy find the radius of the circle?
asked by Jon 
Algebra
I have an input / output machine I need a rule I can use for any value, like 10 or 100 input 1, output 3 input 2, output 6 input 3, output 12 input 4m output 24
asked by Andrea