Questions Asked on
October 5, 2012

chemistry
Acrylonitrile (c3H3N ) is the starting material for many synthetic carpets and fabrics. It is produced by the? following reaction: 2C3H6 (g) + 2NH3 (g) + 3O2 (G0  2C3H3N (g) + 6H2O (g) If 15.0 g C3H6, 10.0 g 02, and 5.00 g Nh3 are reacted, what mass of
asked by maz 
physics
The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?
asked by Anonymous 
Math(Please help, thank you)
For an experiement to test elastic collision, ball 2 was at rest and ball 1 was released from a certain height and distance and hit ball 2. A set of measurements were collected which was v1 and v2 prime for each ball. I need to calculate the kinetic energy
asked by Hannah 
physics
Two packing crates of masses 7.88 kg and 4.62 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 4.62 kg crate lies on a smooth incline of angle 40.0°. a) Find the acceleration of the 4.62 kg crate
asked by Anonymous 
Math
A piece plywood 24 inches wide is cut into strips 2 and a half inches wide, how many strips of this with can be cut. Please help,7th grade.
asked by Barry 
Math
what is the written form of .6045?
asked by Mary 
physics
A hockey puck is hit on a frozen lake and starts moving with a speed of 14.4 m/s. 3.0 seconds later, its speed is 7.3 m/s. (b) What is the average value of the coefficient of kinetic friction between puck and ice?
asked by Anonymous 
Math
If a^x
asked by Whizkid 
chemistry
The formulas for ethane, ethene and ethyne are C2H6, C2H4, and C2H2 respectively. Rank this chemicals 1,2,3 (highest)in terms of strength of IMF and explain the structures of the three molecules. I rank these three based on the bond length so I got C2H2,
asked by Lea 
math
How can knowing the multiplication properties help you evaluate 5x(20x63)?
asked by Kiera 
physics
A car is equipped with a bumper that is designed to absorb collisions. The bumper is mounted to the car using pieces of flexible tubing. The car is traveling at 1.5 m/s when it collides with a rigid black wall. If the wall exerts an average force of 44.1
asked by Vmel 
physics
If M and m are particles connected by light inextensible string. M is held at center and rotated about horizontal axis as M is in equilibrium.What is torque ABOUT ITS CENTER
asked by Anil 
chemistry
Rank C2H6O, C3H8O and C4H^10 O in terms of IMF and explain their structures? neeed heeelppp.thank you
asked by tracy 
math
A poster is 12 inches longer than it is wide. Find a function that models its area A in terms of its width w.
asked by monic 
math
The height of a cylinder is three times its radius. Find a function that models the volume V of the cylinder in terms of its radius r.
asked by monic 
math
A rectangle has an area of 15 m2. Find a function that models its perimeter P in terms of the length x of one of its sides.
asked by monic 
math
The sum of two positive numbers is 90. Find a function that models their product P in terms of x, one of the numbers.
asked by monic 
math
A right triangle has one leg four times as long as the other. Find a function that models its perimeter P in terms of the length x of the shorter leg.
asked by monic 
math
The volume of a cone is 190 in3. Find a function that models the height h of the cone in terms of its radius r.
asked by monic 
Physics
Two packing crates of masses m1 = 10.0 kg and m2 = 3.20 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 3.20kg crate lies on a smooth incline of angle 44.0°.
asked by Utsa 
Physics
4. A football player passes the ball. The ball leaves his hand and is caught 1.7 seconds later by a receiver 30 meters away. (You may assume the ball was caught at the same height from which it was thrown.) a) What is the vertical component of the velocity
asked by Anonymous 
college algebra
solve x^6  64 = 0
asked by Martha 
physics
Two blocks each of mass 3.65 kg are fastened to the top of an elevator as in the figure. (a) If the elevator accelerates upward at 1.48 m/s2, find the tensions T1 and T2 in the upper and lower strings. (p4.21a1), enter the answer for T2, the tension in the
asked by Anonymous 
physics
The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?
asked by Anonymous 
physics
A 5.20 package slides 1.57 down a long ramp that is inclined at 13.0 below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.305 Calculate the work done on the package by friction. Calculate the work done on the
asked by Matt 
French
So i have to answer questions from my french textbook called on y va! 1 and on page 34 theres this article about microbes and 3 called rhinovirus,lacotobacillus and bacillus cereus Heres the questions ________________________________________ Quel miscrobe
asked by Please Help ;D 
Mathematics
Two points P(32degree N, 47 degree W) nd Q(32degree N, 28 degree E) are on the earths surface. Find d radius of the parallel of latitude through P
asked by Blossom 
science
A prisoner that is funny would be what periodic table element?
asked by ashley 
business
What data and stats do you need to know in order to identify profitable nations in which to export.
asked by Lisa 
English
1. He wants to be a singer in the future. 2. He was a lawyer in the past. 3. He is a doctor in the present. 4. He is a doctor at present. 5. He is a doctor at the moment. 6. He is a doctor currently. 7. He is a doctor now. 8. He is a doctor at the present.
asked by rfvv 
Chemistry
In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.
asked by Charlie 
physics
a bomb of mass 5 kg explodes in to two equel fragments. At what angle these fragment fly apart ?
asked by an 
Chemistry
In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.
asked by Charlie 
physics
If motion of a particle of mass (m) is given by y=ut+1/2gt^2 (square).find force acting on it
asked by an 
math 5
why is two hundredths written as 1.02 and not as 1.2?
asked by tameka 
english
Which sentence is correct?Select one of the options below as your answer: A. One can never have two many friends. B. One can never have too many friends. C. One can never have to many friends.
asked by nick 
Precalculus
The owner of a horse stable wishes to set up 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The sides of each corral will be attached to the barn, fencing is not needed along the back wall.
asked by Cole 
HISTORY
Which of the following groups benefitted the least from the prosperity of the second industrial revolution?
asked by Anonymous 
manufacturing
state the application of theory and design consideration of turnig
asked by fatin 
chem
Write the complete ionic equation for Cu(NO3(aq)+K2S(aq)and namd write the formula for the spectator ions in this reaction? This is what I got pls. check it: complete ionic equation: Cu^19aq)+K^1(aq)+S^2(aq)=K^1(aq)+NO3^1(aq)+Cu2S(s) net ionic equation:
asked by Amanda 
chemistry
What two conditions necessary for molecules to be polar? Her's my answer pls check. First, at least one covalent bond in the molecule has to be a polar covalent bond. For a bond to be polar, there must be a difference in the electronegativities of the two
asked by shay 
math
A certain computer can perform 105 calculations per second. How many calculations can it perform in 10 seconds?
asked by Kate 
maths magic
here is a math trick i.e,4545=45.how is that explain me
asked by nanbala 
US History
In need of help, Who Did Alfred T Mahan Look Up To As A Child?
asked by Jon B 
physics
A 0.73 kg ball is thrown straight up with an initial velocity of 2.50 m/s. Taking the potential energy of gravity to be zero at the height from which the ball is thrown, determine its gravitational potential energy at the balls highest point. Ignore air
asked by nate 
chemistry
Water has a bent molecular shape, but what if water had a linear molecular shape would the molecule be polar or nonpolar? Explain This is what I know pls correct me if I'm wrong. It would be nonpolar because it is symmetric so the charge is equally
asked by lea 
US History
What Did Alfred T Mahan challenges He Faced Growing Up
asked by Jon B 
Calculus
Find the derivative of y=15x^7+7^x+22
asked by Jack 
chemistry
When will hydrogen bonding occur?Give an example of liquid other than H2O in which this type of force is important. In order for a hydrogen bond to occur there must be both a hydrogen donor and an acceptor present. The donor in a hydrogen bond is the atom
asked by tracy 
math
Fast Fact. Eight states border one or more of the five Great Lakes. Write a fraction representing the part of the 50 states that border a Great Lake. Write the fraction in simplest form.
asked by keem 
critical thinking/logic
use the direct and the counterexample methods to show that these arguments are invalid? For the counterexample method, display the form used. 1. There could be lightening without thunder. So, there could be thunder without lightening. 2. Nothing its better
asked by marien 
Chemistry
Muriatic acid is the common name of industrialgrade hydrochloric acid (HCl). One of its uses is to clean or etch concrete in preparation for sealing or painting. It is typically sold in 5.00 gallon buckets, with a concentration of 11.7 M. a.What volume of
asked by Amber 
Physics
Tarzan swings on a vine 6.8 m long. The tension in the vine is 1200 N if he's moving at 2.9 m/s when the vine is vertical. What is his mass?
asked by Chelsey 
Physics
An object of mass 1.4kg is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the object remains fixed on the turntable until a rate of 36 rpm is reached, at which point the object
asked by Chelsey 
Physics
When you're driving your 1200kg car, you go around a corner of radius 60.8 m. The coefficient of static friction between the car and the road is 0.67. Assuming your car doesn't skid, what is your speed if the force exerted on it is 5800N?
asked by Chelsey 
math
Original amount $ 90 New amount $84.50 find the percent of increase or decrease
asked by Anonymous 
math
what must be added to each of the following expressions to make it a whole square (i) 4x^2  12x + 7 (ii) 4x^2  20x + 20
asked by TUHITUHI 
physics
A 6.0 Kg object undergoes an acceleration of 2.o m/s squared. what is the magnitude of the net external force acting on it?
asked by ricky 
calculus
Integrate sinx+cosx/rootsin2x with respect to dx...plzz help me
asked by abhi 
health
The key to using a pedometer to meet the Physical Activity Guidelines for Americans is to _________. A. First set a time goal and then calculate how many steps are needed each day to reach that goal B. First set a time goal and then calculate how rigorous
asked by Madison 
physics
how long will it take a 1750watts motor to a lift a 285kg piano to a sixth storey window 1.6 meters above
asked by kyla 
Astronomy
If M is the mass of one body and m is the mass of another body, and their separation is d, then the gravitational force between them is proportional to
asked by Haley 
math
Integrate x^2/rootx1..
asked by abhi 
Math
_ _ x _ = _ _ _ = _ _ x _ use number 1  9 using each each number only once
asked by AB 
chemistry
25mL of tartaric acid solution is titrated against 31mL of NH4OH. What is the normality of the NH4OH? Please explain how to work this problem.
asked by Stephen 
Algebra 2
Find f(x), if f(2b1)=6b+2
asked by Sherina 
Physics
A 2000 kg car is slowed down uniformly from 18.0 m/s to 5.00 m/s in 4.20 s. (a) What average total force acted on the car during that time? (b) How far did the car travel during that time?
asked by Dee 
art 101
According to the author, a. the interpretation of a work of art is objective. b. a work of art may fall into more than one theme. c. it doesn’t make sense to compare art from different cultures. d. all of these are the case: the interpretation of art is
asked by elizabeth 
american history
Which of the following nineteenthcentury inventors is associated with Menlo Park in New Jersey? A. Cyrus W. Field B. Thomas Alva Edison C. Alexander Graham Bell D. Gustavus F. Swift
asked by tiffany 
history
In the Battle of _______, a disastrous charge against forces holding Cemetery Ridge led to Confederate defeat A. Cold Harbor B. Vicksburg C. Antietam D. Gettysburg
asked by tiffany 
history
As ratified in 1870, the _______ Amendment prohibited any state from denying the vote to any male citizen on account of race, color, or previous condition of servitude. A. Thirteenth B. Sixteenth C. Fifteenth D. Fourteenth
asked by tiffany 
Algebra 2
Find f(x), if f(2b1)=6b+2
asked by Sherina 
Chemistry
If 50.00mL of 1.10M NaOH is added to 25.00mL of 1.86M HCl, with both solutions originally at 24.70 degrees Celsius, what will be the final solution temperature? (Assume that no heat is lost to the surrounding air and that the solution produced in the
asked by Tasnim 
english
The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed. 6. Identify which one of the following sentences
asked by cathy 
english
Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed
asked by cathy 
english
Identify which one of the following sentences contains an unnecessary comma. Please correct the error and explain why the correction is necessary. a. I must have been completely absorbed in my work, because I totally forgot about the meeting. b. Because I
asked by cathy 
Chem
Potassium permanganate (KMnO4) solutions are used for the determination of iron in samples of unknown concentration. As a laboratory assistant, you are supposed to prepare 200. mL of a 0.300 M KMnO4 solution. What mass of KMnO4, in grams, do you need? I
asked by Anonymous 
math
if x^4 + 1/x^4 =42 .find x+1/x
asked by TUHITUHI 
math
x^2 + 1/x^2 = 47. find the value of x+ 1/x and x 1/x
asked by TUHITUHI 
Physics
when temperature are near absolute zero, what process causes atoms to begin to clump? Plasmology Condensate Cornell  Weizmann condensation BoseEinstein condensation Is it d?
asked by randomchik 
science
a puppy runs a distance of 20m to its mother ina time 5s.what is the puppy's speed?
asked by victor 
economics
f the US dollar depreciates dramatically relative to the Chinese yuan, what effect would this have on consumers and businesses in each country? When is a falling dollar good or bad for the US?
asked by jessica alva 
Economics
Which aspects of the Great Depression are echoed in the ongoing economic crisis that began in 2008? What is different about the two periods? Do they have similar theoretical explanations?
asked by jessica alva 
c programming
To see how the four steps of the software development procedure discussed in Section 1.7 can be applied in practice, you apply them to the following simple programming problem: The circumference, C, of a circle is given by the formula C = 2ðr, where ð is
asked by fatih 
Math(Algebra)
An arrow is shot vertically upward from the top of a cliff 80 feet tall, with an initial velocity of 64 ft/s, (the acceleration due to gravity is 16ft/sec). a. Write the quadratic equation representing this scenario when h is 0. b. Find the roots
asked by Joshua 
Chemistry
60.0 mL of 3.40 M sodium hydroxide is combined with 39.0 mL of 1.50 M magnesium chloride. What mass in grams of solid forms? (Hint: the total or overall reaction is most useful in doing calculations.) I got 485.1
asked by Anonymous 
play
if two child is using finger paints, they are engaging in what kind of play?
asked by Anonymous 
Functions
What is the inverse of h(x)= (1/4x^2)+x ?
asked by lola 
physics
Leroy, who has a mass of 90 , is skateboarding at 8.6 when he smacks into a brick wall and comes to a dead stop in 0.2 .find the force of impact
asked by Anonymous 
Chemistry
If 50.00mL of 1.10M NaOH is added to 25.00mL of 1.86M HCl, with both solutions originally at 24.70 degrees Celsius, what will be the final solution temperature? (Assume that no heat is lost to the surrounding air and that the solution produced in the
asked by Tasnim 
Chemesitry!
Sodium thiosulfate, Na2S2O3, is used as a fixer in photographic film developing. The amount of Na2S2O3 in a solution can be determined by a titration with iodine, I2, according to the equation: 2Na2S2O3(aq) + I2(aq) > Na2S4O6 +2NaI(aq). Calculate the
asked by Anonymous 
statistics
According to the book Are you Normal?,40% of all US adults try to pad their auto insurance claims to cover their deductible. Your office has just received 128 in insurance claims to be processed in the next few days, what is the probability that fewer than
asked by Lauren 
Math
If you are in a hotair balloon at a height of 100 meters, you can expect to see ____ km. Round your answer to the nearest kilometer and enter only the number.
asked by Jazy 
Chemistry
A 0.3120 g sample of a compound made up of aluminum and chlorine is dissolved in 150 mL H2O. When excess AgNO3 is added, 1.006 g of AgCl is precipitated. What is the number of moles Cl in the aluminum chloride sample?What is the number moles of aluminum in
asked by Anonymous 
chemistry
Would you expect a chemical change to be always accompanied by a physical change?Pls. Explain
asked by Amanda 
Skeletal System
what type of bone cell is very important in the healing of fractures? osteoclasts osteocytes osteoblasts osteosomas
asked by randomchik 
math
What does x equal when 7x+6= 5x+4
asked by Cheyenne 
college math
Classify the triangle as scalene isoceles or equlateral and as acute, right or obtuse
asked by Mom 
chemistry
When two solutions are mixed and a new color is observed, is this color change an indication that a chemical reaction has occurred? Explain. It is not possible to directly observe chemical bonds breaking and forming during a reaction, molecules and atoms
asked by chemdummy 
Science
How does the inner core differ from the outer core?
asked by Tiki 
math
A circular arc has measure 22ft and is intercepted by a central angle of 27 degrees . Find the radius of the circle.
asked by mavis 
ScienceBiology
why do plants grow better under certain lighting conditions than others?
asked by Lulu 
Business Math
2. The interest on $6,000 at 6 percent compounded semiannually for 8 years is: (Use table in the handbook) (Points : 1)
asked by Tanisha 
please help!
I'm having trouble with this word problem. Two friends Jodi and Abe go horseback riding on the same trail in the same direction. Jodi's horse travels at 5 miles per hour while Abes horse travels at a slower pace. After 2 hours they are 2 miles apart. Find
asked by kelly 
social(please help)
Hi, I don't wont home made clay.we would like to use playdoh.how to use social study with playdoh.create a model of one of the following LANDFORMS OR BODIES OF WATER :PENINSULA,MESA OR PLATEAU,MONTAIN,VALLEY,VOLCANO,LAKE,RIVER,OR ISLAND
asked by Lakshmi 
ap
Very small mercury batteries have been made and used in a multitude of applications. Why have they been replaced by other kinds of batteries for most applications? 1. These batteries cannot generate enough current for any modern devices. 2. Mercury is
asked by cheri 
ap
A battery has two electrodes labeled anode and cathode. Electrons flow from the (anode, cathode) to the (anode, cathode) through the external circuit and (an oxidation, a reduc tion) reaction occurs at the cathode. 1. anode; cathode; reduction 2. cathode;
asked by cheri 
ap
In a voltaic cell, electrons flow from the ? to the ? in the external circuit. 1. cathode; anode 2. products; reactants 3. anode; cathode 4. reactants; products
asked by cheri 
ap
Chlorine, bromine, and iodine are good 1. oxidizing agents. 2. reducing agents. 3. bases.
asked by cheri 
ap
For an electrochemical reduction process, electrons are 1. taken from solution species at the surface of the cathode. 2. added to solution species at the surface of the anode. 3. added to solution species at the surface of the cathode.
asked by cheri 
ap
What is a poor conductor of electricity? 1. mercury 2. molten NaCl 3. copper 4. potassium 5. sulfur
asked by cheri 
Physics
A harmonic wave is traveling along a rope. It is observed that the oscillator that gener ates the wave completes 38.9 in 27.4 s. Also, a given maximum travels 432 cm along the rope in 10.6 s. What is the wavelength? Answer in units of cm.
asked by AJ 
Physics
The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 0.51 m) is 305 N, and onehalf wavelength occupies the wire. What is the mass of m the wire? Answer in units of kg.
asked by AJ 
Physics
Standingwave vibrations are set up in a crystal goblet with four nodes and four antin odes equally spaced around the 26.3 cm cir cumference of its rim. If transverse waves move around the glass at 900 m/s, an opera singer would have to produce a high
asked by AJ 
ap
A saturated solution of which of the follow ing substances in water would be the best conductor of electricity? 1. CH4 2. Hg2Cl2 3. HCl 4. NH3 5. CH3COOH
asked by cheri 
ap
Sodium, potassium, and rubidium are good 1. oxidizing agents. 2. reducing agents. 3. bases.
asked by cheri 
Physics
To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern
asked by AJ 
ap
The reaction 2Na+ + 2Cl− ! 2Na + Cl2 is indicative of ? cell; the sign of the anode is ? ; and ? forms at the cathode. 1. an electrolytic; negative; Na+ 2. a voltaic; positive; Na 3. an electrolytic; positive; Na 4. an electrolytic; positive; Cl2 5. a
asked by cheri 
Chemistry
It asks:For each of the following atomic numbers, use the periodic table to write the formula (including the charge) for the simple ion that the element is most likely to form in ionic compounds. For example, they gave 56, and the answer is Ba(2+), but I
asked by Kaleen P 
Physics
The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin odes, and the string vibrates at 130 Hz. Find the wavelength. Answer in units of m. What is the fundamental
asked by AJ 
Physics
A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda mental frequency of 70 Hz? Answer in units of m.
asked by AJ 
Physics
A variablelength air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm
asked by AJ 
Math
what is the future value of $8000 a year for 28 years at 7.5%
asked by james 
science
what is the control in the following experiment  which brand of popcorn has the least amount of unpopped kernels after 3 minutes?
asked by Allison 
chemistry
colorless vinegar added to purple cabbage juice turns pink What is the reason behind and why is it considered a chemical change?
asked by chemdummy 
7th grade math Ms.Sue please
1. Which of these numbers can be classified as both real and irrational? 5.858585858 63.4 square root 21 square root 36 2. Which is both a real number and an integer? 23 1 over 4 square root 27 3.402538 3. Which of these numbers is classified as both real
asked by Delilah 
science
please tell me if you agree with the following: Which Brand of popcorn hs the least amount of unpooped kernels after 3 minutes. Brand 1 has 1 Brand 2 has 15 Brand 3 has 16 Brand 4 has 5 Brand 5 has 25 the answer is Brand 1 BUT is the: independent variable
asked by lori 
Physics
A person pushes a 19.5kg shopping cart at a constant velocity for a distance of 35.6 m on a flat horizontal surface. She pushes in a direction 25.4 ° below the horizontal. A 53.1N frictional force opposes the motion of the cart. (a) What is the
asked by Anonymous 
mathalgebra
one pump can empty a pool in 5 days, wheras a second pump can emtpy pool in 7 days. how long will it take the two pumps, working together, to empty the pool?
asked by amanda 
Physics
A dockworker applies a constant horizontal force of 90.0Nto a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.0min a time of 5.20s.If the worker stops pushing after 5.20s,
asked by Karina 
English ms. sue
ms. sue yesterday i write story abt independence in third person well i have to write another one in first person and i want to write in nonhuman perspective, which animal I be? or could i be something other than creature, but not human?
asked by Mohammad 
math
forty member of a parent organazation are making candles to raise money. one member drops out and the rest have to make 3 more candles each to make up. each member makes the same number of candles. how many candles do they make altogether.
asked by mili 
World History
1.What is an example of economic force? 2. What is an example of political force? 3. What is an example of social force?
asked by Anonymous 
Physics
A turbine is spinning at 3600 rpm. Friction in the bearings is so low that it takes 15 min to coast to a stop. How many revolutions does the turbine make while stopping?
asked by senko 
chemistry
The following reation has the following standard thermodynamic parameters: delta H= 33.6 kJ/mol delta S= 59.8 J/(mol*K). C(g) + D(g) > E(g) Calculate the temperature at which the reaction becomes nonspontaneous.
asked by Brunette 
Physics
A car starts from rest on a curve with a radius of 110m and accelerates at 1.2m/s^2. Through what angle will the car have traveled when the magnitude of its total acceleration is 2.1 m/s^2? Steps please.
asked by senko 
Alg 2
Today we learned how to solve systems of equations with 3 variables, however my teacher didn't go over how to do a problem where not every single equation in the system has the 3 variables. Can someone point me to a place that explains this? the kind of
asked by john 
physics
A small fish is dropped by a pelican that is rising steadily at 0.69 m/s. How far below the pelican is the fish after 2.4 s?
asked by Leslie 
College Physics
A ball of mass 620 g hangs from a spring whose stiffness is 195 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is
asked by Anabel 
statistics
A school adjustment inventory is administered to boys and girls of primary school.Find out weather two groups differ significantly from each other Number mean Std deviation Boys 100 32 10 girls 100 30 6
asked by Bhagya 
time and stress management
relaxation is a state of (a)low arousal (b)high arousal (c)increased blood pressure (d)rapid thought processes my answer is a to analyze exactly what to do with your time,you need to (a)write down everything that you do in a time inventory (b)videotape
asked by susue 
Precalculus
There are 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The diagram has 4 rectangular corrals attached together but fencing is not needed on the back wall of the barn. The barn is above the 4
asked by Cole 
Chemistry
What is the temperature of 0.45mol of gas at a pressure of 1.0at and a volume of 10.1L ? if anyone can tell me what i need to do to solve this problem it would be helpful
asked by Brittney 
time and stress management
progessive mmuscle relaxation is a technique used for (a)falling asleep (B)becoming aware of tension in muscles (C)prepping surgery patients (d)raising blood pressure my answer is b to achieve a low state of arousal,you need to (a)control breathing,thought
asked by susue 
time and stress management
am example of a longterm goal is (a)getting your hair done at your favorite salon (b)traveling to europe (c)finishing a term paper (d)reading a biography my answer is b which of the following is a direct benifit of practicing relaxation techniques (a)less
asked by susue 
Physics URGENT!!!
A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge
asked by Megan 
Math
. Identify each expression as a numerical expression or a variable expression. For a variable expression, name the variable. d + 43  9
asked by Von 
math
On a winter day the temperature at 6 a.m. was 9° F. At 2 p.m. it was 25° F. By how many degrees did the temperature change from morning to afternoon?
asked by julissa 
chemistry
calculate the standard molar entropy change for the combustion of methane gas using S naught values from standard thermodynamic tables. Assume that liquid water is one of the products.
asked by Bru 
Fifth grade English
What is the plural form of staff? Not sure if it should be staff or staffs. Thank you for helping. Britt
asked by Britt 
elementery
HI, MY dughter is studying 3rd grade.how to prepare Tsat test in math,english.can u tell me any links
asked by Lakshmi 
chemistry
at high temperatures, ammonia decomposes to N2 and H2. 2 NH3(g)> N2 (g) + 3H2(g) Delta H for the reaction is positive and delta S is positive. Estimate the temperature at which this reaction becomes spontaneous
asked by Brunette 
Sociology
Compare and contrast the theories of Daniel Levinson , Irene Frieze, and Esther Sales concerning adult development.
asked by Kristina 
science
determine the period of motion when a ball dropped from a height of 4.40m makes a perfectly elastic collsion with the ground without any mechanical energy lost
asked by Anonymous 
science
Hi, create one of the following weather instrument:we would like anemometer.please tell me which one is the best
asked by Lakshmi 
criminal justice
the amount of force used in self defense of another must, under the circumstances that exist, be: a: reasonable, B: correct C: identical D: less than the force being used by the aggressor I think it's D
asked by candy 
Physics
In a headon collision, a car stops in 0.14{\rm s} from a speed of 24{\rm m}/{\rm s} . The driver has a mass of 67{\rm kg} , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a
asked by Amanda 
chemistry
I have been knocking around this question for what seems to be an eternity. We have not gotten that far in this class so this is for extra credit. I have managed to get myself confused about something that should be easy. 25mLof tartaric acid solution is
asked by Stephen 
Physics
Two packing crates of masses 7.57 kg and 4.51 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 4.51 kg crate lies on a smooth incline of angle 40.0°.
asked by Anonymous 
Biology
A detective gathers cell evidence at a crime scene. The victim is a 37 year old man, killed by a blow to the head. Closer examination of the evidence leads the detective to conclude that firewoods was used. Which of the following kinds of evidence BEST
asked by Mary Beth 
Physics
A horse canters away from its trainer in a straight line, moving 130 m away in 13.0 s. It then turns abruptly and gallops halfway back in 5.4 s. a) Calculate its average speed. (b) Calculate its average velocity for the entire trip, using "away from the
asked by royaa 
Physics HELP!
A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical
asked by Samm 
chemistry
C4 H10 O or diethyl ether or with a formula of CH3CH2OCH2CH3 its stick structure is H H H H ! ! ! ! .. HCCCC OH ! ! ! ! .. H H H H I used the this ! sign as a sign for bond. pls help me to determine the geometry for each central atom in this
asked by chemdummy 
that link is not working
HI, MY dughter is studying 3rd grade.how to prepare Tsat test in math,english.can u tell me .can u send me links.Tennese state
asked by Lakshmi 
Kinematics
A 55.0kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is .300. What horizontal force must be applied to the box for it to start sliding along the surface? Please write out the solution. I am getting
asked by Jaybird 
physics
A spring has a length of 60cm when it unstretched. A load of 10N increases its length to 64 cm and a load of 20N increases its length to 68cm a)what extension is produced by the 20N load? b) What length would the spring have if a load of 15N were added to
asked by Maria