Saturday
December 20, 2014

Posts by jade


Total # Posts: 243

Chemistry
100 cm3 of alkane X with the general formula CxHy requires 650 cm3 of oxygen for complete combustion. Deduce the structural formulae for the isomers of X.
December 17, 2014

Physics
a 60-kg student travelling in a car with a constant velocity has a kinetic energy of 1.2 *10^4 J. What is the speedometer reading of the car in km/h?
December 11, 2014

English
In this novel, Moon Shadow comes to America to be with his father, Windrider, from their home in the Middle Kingdom. As Moon Shadow and his father struggle to survive in a hostile country, they somehow find time to focus on their dreams. Windrider has read about the flying ...
December 9, 2014

English
Yes but i dont really get the question or the book, please help
December 9, 2014

English
In the book dragonwings why does windrider break the rules and go after black dog? Why does the tiger genral cooperate with windrider?
December 9, 2014

English
In the book dragonwings why does black dog beat up moon shadow? What does the fact that the boy is not angry at black dog suggest or tell you about him?
December 9, 2014

English
In the book dragonwings why doesn't moon shadow attend public school? How is he being educated?
December 9, 2014

Calc I
I am having trouble taking the derivative of the following: t(4-t^2)^(1/2) I can't decide if you need to use the product rule or not. What I did is used the PR to get (4-t)^1/2)*1t^2*(4t-1)^(-1/2) Is this correct?
December 7, 2014

Chemistry
2K2Cr2O7 + 8H2SO4 + 3C2H5OH → 2Cr2(SO4)3 + 2K2SO4 + 3CH3COOH + 11H2O
November 29, 2014

Chemistry
During a Breathalyzer Test it was determined that 1.60mg of K2Cr2O7 was consumed by the above reaction. Calculate the number of milligrams of ethanol in the test sample.
November 29, 2014

science
a mechanic applies the force of 50 N at a distance of 40 cm from the pivot on a wheel wrench . what is the size of the moment ?
November 9, 2014

Calculus
Please check, if there is something wrong please explain what I did wrong. Thank you! Calculate the d^2y/dx^2. y= e^-x + e^x y' = e^x - e^-x y'' = e^x + e^-x Find the x-coordinace of all critical points of the given function. determine whether each critical point ...
November 6, 2014

chemistry
If you dissolve 236.5 g of (NH4)3PO4 and 166.9 g of K3PO4 in enough water to make the volume of the solution 505.0 mL What is the molarity of ammonium ions and phosphate ions?
November 2, 2014

Physics
At t=0 a grinding wheel has an angular velocity of 24.0rad/s . It has a constant angular acceleration of 35.0rad/s2 until a circuit breaker trips at time t = 1.90s . From then on, it turns through an angle 436rad as it coasts to a stop at constant angular acceleration. Through...
October 5, 2014

Math
F(x)=2sin(3x/2-3pi/4)+2
September 28, 2014

Math
Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one first. For the ...
September 23, 2014

Math
In mr.kingmans math class four fifths of the stundents earned an a on their math exam.the rest of the class earned a b .what percent of the class earned an a ? WhAt percent of the class earned a b
August 10, 2014

PHYSICS
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 62.0∘. Dog A exerts a force of 270N , and dog B exerts a force of 302N . Find the magnitude of the resultant force. Find the angle the resultant force makes with the rope of dog A.
August 10, 2014

PHYSICS
A dockworker applies a constant horizontal force of 71.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 10.0m in a time of 5.50s . If the worker stops pushing after 5.50s , how far does the ...
August 10, 2014

Chemistry Help
1. Spectroscopic studies of the reaction of azide ion with the cluster [Ru3(CO)12] in acetone solvent confirmed the occurrence of process (i) under a CO atmosphere. Kinetic measurements of this rapid [Ru3(CO)12]+ N3– →[Ru3(NCO)(CO)11]–+ N2(i) reaction revealed ...
July 26, 2014

ENG1511 ENGLISH
Good Day, Please help Correct the following sentences for subject verb-agreement, tense or fragment. When he thought he could afford to pay his own school fees. Going home now, how I wish I could get there before it starts to rain. I am writing my homework after every class
July 21, 2014

ENG1511 - english
Good Day, Please help Either subject verb-agreement, tense or fragment. When he thought he could afford to pay his own school fees. Going home now, how I wish I could get there before it starts to rain. I am writing my homework after every class.
July 21, 2014

Physics
1. How is average speed related to instantaneous speed? What certain conditions must be met for the two variables to have the same or close value? 2. Cite one practical example on the use of the concepts of instantaneous speed, average speed in observing safety on the road.
July 2, 2014

Physics
Dina walked North and East and has a resultant displacement of 125, 35^0 East of North. She has a velocity of 2.5 m/s. Compute her walking time and average speed.
June 26, 2014

Physics
1. A person runs 800. m at an average speed of 6.00 m/s and then the next 800. m at an average speed of 8.00 m/s. Calculate (a) the total time of travel and (b) the average speed. 2. Sam travels by car from one city to another. He drives for 45.0 min at 95.0 km/h, 30.0 min at ...
June 24, 2014

Physics
On the way to class, you walk north and then west such that your resultant displacement is 290 m in a direction 25deg west of north. Your average velocity is 2.0 m/s in the same direction as the displacement. Calculate (a) your walking time and (b) your average speed.
June 24, 2014

Math
Compare and contrast the solutions of ax^2 + h = 0 to the solutions of ax^2 = h, where a and h are positive.
June 19, 2014

Math
1. What is the tenth term of the geometric sequence whose first term (a1) is 16 and the common ratio (r) is –½? 2. Given the terms a10 = 3 / 512 and a15 = 3 / 16384 of a geometric sequence, find the exact value of the first term of the sequence.
June 18, 2014

Math
Given: ________, – 243, – 226, – 209, – 192, – 175, … The 67th term of the sequence is __________. The series of the first 27 terms of the sequence is __________.
June 18, 2014

Math
– 11 is the __________ term of the arithmetic sequence – 847, – 836, – 825, – 814, – 803, …
June 17, 2014

Physics
A person runs 800. m at an average speed of 6.00 m/s and then the next 800. m at an average speed of 8.00 m/s. Calculate (a) the total time of travel and b) the average speed.
June 17, 2014

Math
Find the value of x so that 3x – 2, 2x – 1 and 4x – 3 form an arithmetic sequence.
June 17, 2014

Math
Black Eyed Peas’ 2011 Live Concert is to take place in a circular park. Due to the shape of the area, seats are set up so that the innermost row has 64 seats and each successive row has 17 more seats than the row before it. The park’s open area can accommodate 17 ...
June 17, 2014

college math
The area of a wetland drops by 15 every 9 years. What percent of its total area disappears after 45 years?
April 1, 2014

Physics
What would be the total distance traveled?
March 23, 2014

Physics
A stone is thrown in the air with an initial velocity of 50 m/s at 37 degrees to the horizontal. Find the total time the ball is in the air.
March 23, 2014

Physics
The rope forms a triangle with the pole and the angle is between the rope and the point at which it connects to the pole.
March 12, 2014

Physics
A carnival seat and a passenger has a combined weight of 193. As the seat is spun on a 18m rope tethered to a pole at an angle of 59.2 degrees, at what speed is the seat traveling?
March 12, 2014

Finance
Find the APR, or stated rate, in each of the following cases EAR: 12.4 semianually 13.3 monthly 11.0 weekly 14.7 infintely
February 23, 2014

English
Thank you, Tyler and Ms. Sue.
February 19, 2014

English
present
February 19, 2014

English
Selina Sanchez, together with her colleagues, ________ a competitive market research model for other businesses to follow. (Points : 1) present presents
February 19, 2014

English
are
February 16, 2014

Physics
A ball has an initial velocity of -23m/s. If the ball has a new velocity of 76m/s after 27 seconds, what is the ball acceleration
December 12, 2013

math
If Julie bought 8 T-shirts, she would be short $28. If she bought 4 T-shirts and 3 baseball hats, she would have $17 left. If each hat cost $5, how much money did she have in the beginning?
November 7, 2013

math
Laundry- detergent $7.99 T Flower- bouquet $3.99 T, A grocery store receipt shows 5% state tax due on laundry detergent and a flower bouquet. Does it matter whether the tax is calculated on each separate item or the total cost? Explain.
November 6, 2013

math
Sarah bought 8 folders and 3 rulers. Lea bought 8 rulers and 3 folders. Sarah paid $1.25 more than Lea. How much was each folder if each ruler was 45 cents?
November 1, 2013

math
Stephen drove at a constant speed from Town X to Town Y at 9 A.M. yesterday. Half an hour later, Cole drove from Town X to Town Y at a constant speed that was 30km/h faster than Stephen's. By 9:30 A.M., Stephen traveled 40 km. Cole caught up with Stephen at Town Y, ...
October 24, 2013

math
What is 20 divide by 6400?
October 23, 2013

math
Stephen drove at a constant speed from Town X to Y at 9 A.M.yesterday. Half an hour later Cole drove from Town X to Y at A constant speed that was 30 km/h faster than Stephens. By 9:30 A.m, Stephanie had already traveled 40 km. Cole caught up with Stephen at Town , arriving at...
October 22, 2013

math
This year the Sum of Mr. Bellinis age and his son's age his son's age is 38 years. 4 years ago, Mr. Bellini was 5 times as old as his son. How old is his son this year? How old is Mr. Bellini this year?
October 10, 2013

math
When dividing 0.08 by 0.4 I come up with 5, but I need to show it in a graph. I can't figure out how to do this
October 10, 2013

thank you
Thanks for your help Jai. ;)
October 8, 2013

math
This year, the sum of Mr. Bellini's age and his son's age is 38 years. 4 years ago, Mr. Bellini was 5 times as old as his son. How old is his son this year? How old is Mr. Bellini this year?
October 8, 2013

math
Thank you so much Steve. :)
October 7, 2013

math
Deepak is 10 years old, and his brother is 7 years old. In how many years time will their total age be 41.
October 7, 2013

SS
wow had the same questions on my quiz and got them all right
September 29, 2013

solve algebra equation
32.1=a-21.8
September 19, 2013

Chemistry
The post that I followed for #1 ended up with the wrong answer
September 11, 2013

Chemistry
A 16.0 g sample of a compound known to contain 3 ion species is dissolved in 100. g of water. The boiling point of the solution is 103.1°C. What is the molar mass of the compound?
September 11, 2013

Chemistry
Hard ball candy is prepared from boiling an aqueous sugar solution that has a boiling point of 260.°F. What is the molality of this solution?
September 11, 2013

Chemistry
What is the freezing point of a solution of sucrose (table sugar), a nonelectrolyte, that contains 60.0 g of C12H22O11 dissolved in 413 g of water?
September 11, 2013

Chemistry
A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. What is the molarity of the magnesium sulfate solution?
September 11, 2013

Chemistry
If you are making 230.0 mL of 2.70% (m/m) CuSO45 H2O, how many grams of the solute should you use?
September 11, 2013

Trig
Suppose a CD player makes 48 revolutions per minute. Through how many degrees will a point on the edge of a CD move in 1 minute? In 2 sec?
July 5, 2013

Trig
A tire is rotating 600 times per minute. Through how many degrees does a point on the edge of the tire move in 1 minute?
July 5, 2013

Chemistry
A tire is rotating 600 times per minute. Through how many degrees does a point on the edge of the tire move in 1 minute? In 1 second?
July 5, 2013

Chemistry
Suppose a CAV player makes 48 revolutions per minute. Through how many degrees will a point on the edge of a CD move in 1 minute? In 2 sec?
July 5, 2013

Math
What is 36 over 156 in simplest form?
June 26, 2013

statistics
Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the interval from 0 to 2a (...
June 10, 2013

grammar please help!
thank you so much!
May 1, 2013

grammar please help!
1.D 2.A?
May 1, 2013

grammar please help!
I still need help on 1 and 2. Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b. father c. from d. work 2. Ashley put her journalism books in the new bookcase. a. bookcase b. put c. new d. in ...
May 1, 2013

6th grade grammar please help
thank you but I'm still confused on 1 and 3 could you explain why its not from and in.
April 30, 2013

6th grade grammar please help
I need a good grade in grammar so please check my answers! Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b . father c. from d. work 2. Ashley’s bedroom was across the hall. a. bedroom b. ...
April 30, 2013

Calculus
Find dy/dx by implicit differentiation for x^2 - 2xy + y^3 = C
April 28, 2013

Chemistry
How many grams of CuSO4 * 5H2O are needed to prepare 100mL of a 0.10 M solution ?
April 4, 2013

Chemistry
Identify the atom that increases in oxidation number in the following redox reaction. 2MnO2 + 2K2CO3 + O2 2KMnO4 + 2CO2 *A.) Mn B.) O C.) K D.) C Please show work Thank you.
March 21, 2013

Spanish: check answers
Ms. Sue the answers are right under 19, It says answers and I listed my them. Thank You MathMat.
March 21, 2013

Spanish: check answers
Questions: 3. Paella is a dish like tacos. a dish made of rice, seafood, and vegetables eaten in Spain. another name for enchiladas. 4. Fast-food restaurants in the Spanish-speaking world are generally very popular with adults. look similar to the ones in the United States and...
March 21, 2013

Us History
How did social responsibility of businesses change during the Great Depression era?
March 5, 2013

Calculus
Determine convergence or divergence for the following series. State the tests used and justify your answers. Sum (infinity, n=1) 1/(1+e^-n) Sum (infinity, n=1) (2*4*6...2n)/n! Sum (infinity, n=0) (n-6)/n Sum (infinity, n=0) (n-6)/n! Sum (infinity, n=0) (100n^14)/4^n
March 4, 2013

Calculus
Determine convergence of divergence. If convergent, find the sum. Sum (infinity, n = 0) (e/pi)^n
March 4, 2013

Spanish 1
Complete the sentences with the correct form of ir. todos Los Dias, yo ____ a la escuela
February 26, 2013

English
period is right
February 12, 2013

math
Which units would you use to measure the area of a rectangle with L=1m and W=34 cm? Explain
February 12, 2013

math
i write out all the whole numbers,starting from 1,If i wrote 1994 digits altogether,what was the last complete number i wrote down
February 10, 2013

math
what is the interior angle of a regular polygon
February 10, 2013

math
Write the fraction in the simplest form. 12/56: 3/30: 5/25: 9/39: 6/54: 2/100: 8/18: THANKS
January 24, 2013

math
i thought you would add?
January 16, 2013

math
Jeremy collected nickels for one week. He is making stacks of his nickels to determine how many he has. The thickness of one nickel is 1/4 in. How tall is a stack of 4 nickels? 3 nickels, 2 nickels?
January 16, 2013

Math
Is yo last name akres/ acres, or Whatever.
January 14, 2013

Science, Heat Transfer
someone please help me!
January 14, 2013

Science, Heat Transfer
list 3 forms of radiation from the sun. how are they alike. how do they differ?
January 14, 2013

math
infinite
January 14, 2013

math please help imedietely
if for one row she needs 3red 6yellow and 3white, then for 8rows, 8x3 8x6 and 8x3= 24, 48, 24. :)
January 14, 2013

its urgent math i need the answer fast
first how many units?
January 14, 2013

5 th grade math
D.
January 10, 2013

Algebra 1
40 bicycles
January 9, 2013

Geometry
a baseball diamond is a square 27 cm on a side. how far is the homeplate from the second base?
January 4, 2013

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