timmy
Most popular questions and responses by timmy
chemistry
In the reaction between formic acid (HCHO2) and sodium hydroxide, water and sodium formate (NaCHO2) are formed. To determine the heat of reaction, 75.0 mL of 1.07 M HCHO2 was placed in a coffee cup calorimeter at a temperature of 20.8 °C, and 45.0 mL of
asked on April 4, 2013 
physics
The body in Fig. 1037 is pivoted at O. Three forces act on it in the directions shown: FA = 13 N at point A, 6.4 m from O; FB = 17 N at point B, 3.6 m from O; and FC = 15 N at point C, 2.2 m from O. Taking the clockwise direction to be negative, what is
asked on March 26, 2012 
Chemistry
A weather balloon is inflated to a volume of 26.2 L at a pressure of 755 mmHg and a temperature of 32.5 ∘C. The balloon rises in the atmosphere to an altitude where the pressure is 360. mmHg and the temperature is 13.5 ∘C. Assuming the balloon can
asked on October 27, 2015 
science
how many grams of copper sulfate pentahydrate (CuSO4 5H2o) would you heat to produce 29.8 grams of water?
asked on March 18, 2009 
AP Chemistry
1.A compound consists of 65.45% C, 5.492% H, and 29.06% O on a mass basis and has a molecular mass of 110 g/mol. Determine the molecular formula of the compound. 2. What is the formula weight of iron (II) sulfate? Answer in units of g/mol. 3. What is the %
asked on September 22, 2012 
economics
perfectly competitive industry. Each firm having identical cost structures. longrun average cost is minimized at an output of 20 units. Minimum average cost is $10 per unit. total market demand is Q=150050P. What is the longrun equilibrium price? Total
asked on November 13, 2007 
Math
A cylindrical tin can has a radius of 4.5cm and a height of 5 cm (a)What is the surface area of the can (b)What is its volume? (c)What is the cans capacity could somebody please answer this question so i can get past with math
asked on February 29, 2012 
physics
3 points particles with masses 4kg,2kg,3kg are at the corners of equilateral triangle of side m =2m.
asked on November 28, 2012 
Calculus
An inverted conical tank is 3m tall and 1m in diameter at its widest point. The water is being pumped out of a spout 2m above the top of the tank. Recall that the density of water is = 1000kg/m^3 (a) Find the work needed to empty the tank if it is full.
asked on May 19, 2014 
Math
A ball has a radius of 56mm a)Calculate the surface area b)what is the volume of the sphere could somebody please answer for my math homework I need help
asked on February 29, 2012 
physics
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe's diameter is 56.3 cm (0.563 m) and the flow speed of the petroleum is 13.5 m/s. At the refinery the petroleum flows at 5.65 m/s. What is the volume
asked on December 10, 2014 
chem 2
methylamine is a weak base. calculate the pH of a .025 M solution of methylamine.
asked on November 4, 2014 
precalculus
find the additive inverse of the number 6 pi and 7
asked on September 9, 2009 
chemistry
a sample consisting 22.7g of a nongasous unstable compound X is placed inside a metal cylinder with a radius of 8Cm and a piston is carefully placed on the surface of the compound so that for all practical purposes the distance between the bottom of the
asked on April 21, 2008 
algebra/math
Find the smallest value of x such that x^2+6x + 9 = 24 Please help me! I am very confused. Thank you!
asked on April 12, 2016 
Physics
An Olympic diver performs a dive from the 10 m platform and achieves a speed of 14 m/s just before entering the water. Neglecting air friction, approximately how many times larger the diver’s speed than the diver would have achieved by performing from a
asked on March 15, 2012 
Physics
On vacation, your 1350 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.20 m/s2. (a) What is the net force exerted by the car on the trailer? (b) What force does the trailer exert on the car? (c) What is the net force acting
asked on October 20, 2016 
math
The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material? This is the last question for my homework could u answer this
asked on February 29, 2012 
chemistry
Calculate the value of DHo for the reaction 2 CH4 (g) > C2H6 (g) + H2 (g) given the following thermochemical equations: C2H2 (g) + H2 (g) > C2H4 (g) delta = – 175.1 kJ C2H6 (g) > C2H4 (g) + H2 (g) Delta = + 136.4 kJ C2H2 (g) + 3 H2 (g) > 2 CH4 (g)
asked on January 23, 2012 
geometry
Given: M is the midpoint of line segment PQ and line segment RS. Prove: line segment QR is congruent to line segment PS.
asked on March 11, 2011 
microeconomics
This is what I have, qi=20, AC(average cost)=10, and (total market demand) Q=150050p. What is the industry's longrun supply schedule?
asked on November 13, 2007 
science
The two sources of new materials involved in geologic processes are: magma soil erosion products deltas
asked on October 9, 2018 
chemistry
A graduated cylinder contains 17.0 mL of water. What is the new water level after 31.6 g of silver metal with a density of 10.5 g/mL is submerged in the water
asked on October 7, 2015 
Chemistry
The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(g°C), how much heat is
asked on July 8, 2013 
math
The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?
asked on February 29, 2012 
Physics
A tennis player places a 64 kg ball machine on a frictionless surface. The machine ﬁres a 0.051 kg tennis ball horizontally with a velocity of 36 m/s toward the north. What is the ﬁnal velocity of the machine? Answer in units of m/s
asked on November 30, 2011 
Rounding#'s
use a calculator to find each rounded to 4 decimal places. 1) sec 15.2 degrees 2) an acute angle theta if csctheta= 1.38
asked on September 2, 2011 
physics
What is the absolute pressure at the bottom of a storage tank of oil 18m deep that is open to the atmosphere? Take the density of oil to be 800 kg/m3.
asked on July 29, 2013 
Chemistry
A sample of naphthalene (C10H8) that has a mass of 0.7200 g is burned in a bomb calorimeter. The mass of the calorimeter is 1.580 kg, and its specific heat is 2.55 J/(g°C). As a result of the reaction, the temperature of the calorimeter increases from
asked on July 8, 2013 
chemistry
Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation, delta Hf? a) FeO(s) + CO2(g) > FeCO3(s) b) 1/2 N2(g) + 2 O(g) > NO2(g) c) 2 Na(s) + Cl2(g) > 2 NaCl(s) d) Ba(s) + N2(g) + 3
asked on January 23, 2012 
algebra1
how do you figure out this answer.15.6+xforx=17.9
asked on August 24, 2011 
Is anyone here a chemistry genuis?
The formate ion, (CHO2), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium
asked on April 9, 2010 
MATH
THE FRIST TERM OF AN A.P IS EQUAL TO TWICE THE COMMON DIFFERENCE D FIND IN TERM OF D THE 5TH TERM OF THE A.P
asked on October 10, 2018 
Marketing
Good marketing managers know that A.marketing strategies can't influence consumer "wants." B.marketers can't create internal drives in consumers C.it is not that difficult to develop a marketing strategy that gets consumers to do what they don't want to
asked on May 27, 2017 
Marketing
The goal of target marketers is to develop unique marketing strategies that find unsatisfied customers to whom they can then offer superior value through more attractive marketing mixes. True or False I pick true please check my answer.
asked on May 27, 2017 
Math
Write the equation of the line in the indicated form that meets each criterion below. A. A line with a slope of 2/3 and a yintercept of 4; in slopeintercept form B. A line with a yintercept of – 2 and an xintercept of 3; in standard form C. A line
asked on February 25, 2017 
Physics
A 0.15 kg baseball is moving at 35 m/s toward home plate when it is hit with the bat. The ball is in contact with the bat for 0.0019 s, and leaves the bat at 25 m/s directly away from home plate. Determine the average force exerted by the bat on the ball.
asked on October 20, 2016 
geometry
Triangle PQR has vertices P(0,12) Q(7,11) ans R(2,2) Find the eaquation of the triangles median through point Q
asked on January 17, 2011 
math
Bronze cocnsists of 6 parts tin to 19 parts cooper. How amny pounds of tin are there in a 500 lb. bronze statue? What is the formula for getting the answer?
asked on February 1, 2010 
MATH
Jenna always throws loose change into a pencil holder on desk and takes it out every 2 weeks. this time it is all nickels and dimes. There are 7 times as many dimes as nickels and the value of the dimes is $6.50 more than the value of the nickels. How many
asked on April 29, 2015 
math
Numbers that are palindromes read the same forward and backward. For example, 30203 is a five digit palindrome. If a single number is chosen randomly from the set of all threedigit numbers, find the probability that it will be palindromic. Answer 1/10??
asked on April 14, 2015 
finance math
A car dealer purchased 2 cars, one for $1500 and the other for $20000, He then sold the first car at a loss of 14% and the second car for a profit of 15%. Find the dealer¡¯s profit for the whole transaction and express the answer as a percentage of his
asked on August 27, 2012 
physics
A student laying on a building 54.0 m high shoots a pellet gun horizontally. If the pellet lands 156 m form the base of the building, what was the muzzle velocity of the gun?
asked on October 18, 2011 
Hard Calculus
f(x)= xsquared 2x for y= absolute value of f(x) does the derivitive exist at x=0 and explain why.
asked on September 22, 2010 
chemistry
in a lab experiment to obtain the molar mass of a voltaile liquid, the following data is obtained: volume of flask=225ml mass of flask=77.834gms mass of flask+gas=78.416gms temperature=100 degrees celsius pressure=714 torr What is the molar mass of the
asked on August 5, 2010 
Math
Andre left his campsite and paddled to a fishing hole 1.5 km downstream. He timed his trip and found that it took him 9 min, His return trip upstream took him 22.5 min. Determine the speeed at which he paddled and the speed of the river? what steps did u
asked on February 22, 2016 
Organic Chemistry
How many moles of hypochlorous acid are needed to react with 0.621 mol of 9fluorenol? please help
asked on February 1, 2012 
English
Pronoun case for who and whom 23a. Jon Bon Jovi, who is a wellknown singer and actor, also owns an arena football team. 23b. Jon Bon Jovi, whom is a wellknown singer and actor, also owns an arena Please what is the correct answer? I chose (A).
asked on April 27, 2008 
Math
The average debt for juniors exceeds the debt for sophomores by $ 458$458, and the average debt for seniors exceeds the debt for sophomores by $1165. The combined debt for a sophomore, a junior, and a senior is $6543. Determine the average debt
asked on March 18, 2017 
Yoruba
There is no animal without plant,there is no plant without water,there is no cloud without the sun,the sun is essential
asked on January 23, 2017 
Chemistry
Homework question? Colmanite [Ca2B6O11 * 5 H20] is a salt whose boron content gives glass high clarity. You are a buyer for an optical fiber manufacturer and want pure material. You have just received a Certificate of Analysis for a lot that is 12.8 +
asked on October 26, 2016 
Elementary Stats
A box contains two red balls, four green balls, and two white balls. You extract balls from the box with replacement 100 times. Eachh time you extract a red ball, you win $1; a green ball, you lose $0.50; a white ball, nothing happens. Make a box model of
asked on October 26, 2016 
math
Determine the number of odd, nonrepeating three digits numbers that can be written using digits from the set {1, 2, 3, 4}.
asked on April 14, 2015 
Math
There are 9 boys and 12 girls at a party,everyone is wearing a pair of shoes.How many shoes are there
asked on March 15, 2013 
Math
Fun video rents videos for $1 per video plus chafes a $5 membership fee. Your equation should represent the total cost for renting any number of videos. write an equation Function Table
asked on December 27, 2012 
math
i don't know but the question is to circle the object that is heavier(shoe,sock,feather,marble,brick and tape measure)i know a brick,and the tape measure is heavy but i'm not sure about the shoe and the marble
asked on October 27, 2012 
Physics
A man (80kg) jumps from a 17 storey balcony (51 metres). How long would it take for him reach the ground? ~Sorry for the morbid example, we were just having a chat about it lol
asked on July 3, 2012 
8th grade
A leaky faucet fills a 100 millimeter cup in 10 minutes. 1.how much water is wasted in a day?a week?a non leap year? 2.How long does it take to waste a kiloliter of water? (hint:1 kiloliter=1000000 milliliters)
asked on August 19, 2010 
social studies
hello, my homework page starts out with In 1979, muslim fundalists led a successful rebellion against the united statesbacked shah of iran and took control of that country? my question is what country? i think the paper printed wrong were doing 1979
asked on March 2, 2010 
3rd grade
why does a tennis ball go furthur than a beach ball? force and motion question
asked on October 8, 2009 
web 1
what do most virtual encyclopedias require after a trial period
asked on September 16, 2009 
MATH
What is the area of the region bounded by the lines x=1 and y=0 and the curve y= xe^x^2? A. 1e units squared B. e1 units squared C. (e1)/2 units squared D. (1e)/2 units squared or E. e/2 units squared if you can show me how to get that please
asked on February 23, 2009 
?
what happens the first time that buck answers the call of the wild? http://www.sparknotes.com/lit/call/ =)
asked on November 29, 2006 
Maths
Factorise 25k^220+(4/k^2)
asked on February 7, 2018 
Yoruba
Please help me translate : it burns the leaves,it dries the roots,it wither the flower,yet it is very useful
asked on January 23, 2017 
Algebra
Find an equation of variation in which y varies jointly as x and z, and y=4 when x=4 and z=1. Simplify
asked on May 9, 2016 
Science
What might be the functions of the chemical additives in body washes?
asked on February 17, 2016 
chemistry
what is thiosulphate
asked on February 16, 2016 
Chemistry
why is chemistry needed
asked on February 16, 2016 
algebra2
Please help me find the lcd (x+6)+(2x1)
asked on October 10, 2014 
Writing
What are the five features of a letter.
asked on March 13, 2013 
math
is a marble heavy more than 1 pound
asked on October 26, 2012 
physics
A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. How far down range will he land?
asked on October 18, 2011 
physics
A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. How many seconds will the teacher be in flight?
asked on October 18, 2011 
physics
A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. What is the maximum height the teacher will reach in his flight?
asked on October 18, 2011 
physics
A teacher is shot out of a cannon. He leaves the barrel at an angle of 25.0o to the ground with a velocity of 45.0 m/s. What is the teacher's horizontal velocity?
asked on October 18, 2011 
math
change ratio to lowest terms.
asked on November 4, 2010 
Hard Calculus
f(x)= xsquared  2x Determine whether y= f(IxI) is continous at x= 0 justify your answer
asked on September 23, 2010 
social studies
sorry to bother you again what does secular mean
asked on March 2, 2010 
Math
If a mixture requires 2 parts water to 3 parts of alcohol what percentage of mixture is water. How do I work this problem?
asked on February 1, 2010 
precal
solve cos(squared)x + sinx = 1 {0, 2pie)
asked on January 12, 2010 
Math
A train that is one mile long starts through a tunnel that is also 1 mile long. the train is traveling 15 miles per hour. how long does it take for the train to get completely through the tunnel?
asked on August 29, 2011 
Criminal law
"self induced intoxication negates mens rea, hence no crime is committed" justify the statement.
asked on February 18, 2008

English
BBB. 100%
posted on March 28, 2019 
English
play nice
posted on March 21, 2019 
math
I suggest you use brainly.com
posted on March 14, 2019 
math
4 1/6 cups of almonds remaining.
posted on December 4, 2018 
READING
^^ There right
posted on October 18, 2018 
calculus
You already answered the question, estupid
posted on May 30, 2018 
Chemistry
I'm not 100% sure, but I believe that it is dealing with the electronegativity. to determine the type of bond a molecule has, you use the electronegativity. You take the higher electronegativity and subtract the lower electronegativity. if the value is
posted on March 22, 2018 
AP Literature
yeah they're wrong...took the test on my own and found that i got an A
posted on January 17, 2018 
language arts
SHLONG DADDY IS 100% CORRECT THANK YOU SO MUCH A C D
posted on January 16, 2018 
algebra
^?
posted on December 12, 2017 
Social Studies
i hate scammers
posted on June 2, 2017 
social studies
I Only Use Jishka When My Grades Are Low So Please Dont Put Fake Asnwers
posted on June 2, 2017 
Grammar
The goal of target marketers is to develop unique marketing strategies that find unsatisfied customers to whom they can then offer superior value through more attractive marketing mixes. True or False
posted on May 27, 2017 
Yoruba
I mean translate to yoruba Please
posted on January 23, 2017 
Math
How the crap do i do this.
posted on December 13, 2016 
Physics
the angular speed, or 4pi
posted on November 10, 2016 
Math
21
posted on October 2, 2016