Monday
September 22, 2014

Posts by Tim


Total # Posts: 952

Algebra
A model train is made by connecting cars with possible lengths of 2 inches and 5 inches. what is the number of inches in the greatest impossible whole-number length of such a train?
January 22, 2011

chemistry
how much lithium hydroxide will be needed to remove 75.0 grams of carbon dioxide?
January 21, 2011

algebra
Sam has $50 in the bank. He deposits $5 each week and does not withdraw any money. How much will he have in his account in w weeks?
January 18, 2011

Chemistry
Mass of flask = 81.39g Mass of flask and water = 104.26g Mass of flask ,water,and solute =129.53 Mass of solute= 25.27g Boiling point of water =98.7C Boiling point of solution =109.5C Calculate the molecular weight of the solute using the data. M=Kb*r solute/delta Tb*kg ...
January 10, 2011

algebra
y+x=-9
January 4, 2011

algebra
slope x=-6
January 4, 2011

algebra
6+9x<42
January 4, 2011

algebra
solve -10<=3x-5<=-4
January 4, 2011

economics PLEASE HELP
According to the permanent income hypothesis, households will tend to react to a temporary tax cut by
December 20, 2010

geometry
Triangle ABC is an isosceles triangle, where angle B is the vertex angle. If BC = 10x-4 , AC= 2x+18 , and AB= 6x+32, find the value of x.
December 15, 2010

calc
construct an isoceles triangle with an area of 100. what is the length of the base of the triangle which has the smallest perimeter? Prepping for a test, explanations please
December 9, 2010

physics
A convex mirror with a radius of curvature of 10 cm (C=10 cm) produces a virtual image 1/3 the size of the real object. What is the object's distance?
December 3, 2010

Chemistry
A 15.0% (by mass) NaCl solution is available.. Determine what mass of solution should be used to obtain a. 2.50 mole of NaCl b. 25.0 g/mol of NaCl
December 2, 2010

math
A square room has perimeter of 32 feet. How. Many many square floor tiles with sides 1 foot long are needed to cover floor
November 30, 2010

Physics
An amusement ride consists of a large horizontal circular platform turning at 12 rpm. People attempt to sit on this platform without slipping toward the outer edge. The coefficient of static friction is 0.15. Determine the distance from the center of the platform that a 150-...
November 30, 2010

us history
The Mayflower compact is an example of which concept?
November 29, 2010

algebra
solve using the multiplication principle.
November 28, 2010

Math
My teacher gave us a puzzle. I have worked on it for 2 hours with both my parents and they can not figure it out. 0 o 0 o 0 o 0 o 0 In the above there are 5 squares. Top left, top right, bottom left and bottom right, and the last one formed by the o's diagaonally. Arrange ...
November 22, 2010

algebra word problems
You have a total of $175 in $5 and $20 bills. The number of $5 bills you have is 3 more than 4 times the number of $20 bills. How many of each type of bill do you have?
November 21, 2010

college chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

college chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

chemistry
10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?
November 17, 2010

physics please help
A 8.6 kg board is wedged into a corner and held by a spring at a 50.0° angle, as the drawing shows. The spring has a spring constant of 186 N/m and is parallel to the floor. Find the amount by which the spring is stretched from its unstrained length.
November 16, 2010

Physics
A ski gondola is connected to the top of a hill by a steel cable of length 620 m and diameter 1.5 cm. As the gondola comes to the end of its run, it bumps into the terminal and sends a wave pulse along the cable. It is observed that it took 14 s for the pulse to travel the ...
November 10, 2010

Physics
A mass of 1.66 kg stretches a vertical spring 0.312 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again?
November 10, 2010

Science
How many atoms of aluminum can be produced by the decomposition of 47.1 g of Al2O3? (Hint: Write and balance the equation first.) The products are oxygen gas and aluminum metal (Al) A) 1.11 X 10^24 Al atoms B) None of these C) 1.39 X 10^23 Al atoms D) 5.56 X 10^23 Al atoms E) ...
November 10, 2010

physics
A 0.01-kg baseball traveling in a horizontal direction with a speed of 12 m/s hits a bat and is popped straight up with a speed of 15 m/s. (a) What is the change in momentum (magnitude and direction) of the baseball? (b) If the bat was in contact with the ball for 26 ms, what ...
November 9, 2010

physics
An object of mass 4.3 kg is projected into the air at a 45° angle. It hits the ground 3.8 s later. What is its change in momentum while it is in the air? Ignore air resistance.
November 9, 2010

physics
A 0.105 kg baseball is thrown upward with an initial speed of 12.0 m/s. (a) What is the force on the ball when it reaches half of its maximum height? (b) What is the force on the ball when it reaches its peak?
November 6, 2010

physics
its not 9.8 or 9.81, ive already tried that
November 5, 2010

physics
A 2.22 kg book is dropped from a height of +3.2 m. What is its acceleration? can you help?
November 5, 2010

Calculus
Your problem doesn't state the original population, so you need to rephrase your homework question to give all the information. You can use a program like Winplot to plot this function, and pick off the relevant data.
November 5, 2010

calculus
Lim= x-Infinite x+0/(x2+1)=? please show work
November 3, 2010

Physics
never mind, found the mistake I was making.
October 29, 2010

Physics
Using the definition of the scalar product, find the angles between the following pairs of vectors. A = - 4 i + 2 j + 2 k and B = - 3 j - 3 k I understand to do [(A).(B)]/|A|*|B| = cos theta; but I'm getting 0 for |A| and don't know how to access it from there.
October 29, 2010

calculus
A particle moves along the curve y=square sqrt 1+x^3. As it reaches the point (2,3), the y-coordinate is increasing ata a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant?
October 25, 2010

physics
73.5 miles south
October 22, 2010

science
Name some ways the wind and rain change the Earth's top layer(soil).tell why?
October 22, 2010

9th grade
Use the distributive property to simplify: 25(2x + 1/5).
October 15, 2010

Check a chemistry answer
So I think I have done this problem right, I was just wondering if anyone would check over it for me. What mass (in grams) of P2O5 contains 1.20 x 1023 atoms of phosphorus? 1.20E23 atoms of P x (1 mol/ 6.022E23 atoms) x (5 mol O/ 2 mol P) x (1 mol P2O5/ 5 mol O) x (79.995g/ 1 ...
October 14, 2010

science
can you list the things that causes weathering?Please.
October 12, 2010

Algebra
What is the domain of the function f(x) = square root of (12x-24) I don't get this concept and I have a ton of these problems-can you please explain how to get it Thank you
October 11, 2010

buisness and tecnoligy
How can lean manufacturing and near-sourcing help a company gain a competitive edge and prepare for the future
October 9, 2010

social studies
New York city is located in the northeastern part of the united states.It has an area of 47,377 square miles and a total inland water area of 1,731 square miles.New York city is one of the 62 counties of New York state and is consist of many road and railways.The capital of ...
October 8, 2010

social studies
I think New york is located more to the south of the map. Its capital is Albany and it sits at the mouth of the Hudson River.
October 8, 2010

social studies
by helping me write the paragraph
October 8, 2010

social studies
write a paragraph describing the location of the New York City on the map of the New York State using compass rose
October 8, 2010

Physics
A 6-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2430 N for 0.1 s. One piece of mass 2 kg travels backward at a ...
October 7, 2010

Physics
A bob of mass = 0.250 is suspended from a fixed point with a massless string of length = 23.0 . You will investigate the motion in which the string traces a conical surface with half-angle = 25.0. What tangential speed must the bob have so that it moves in a horizontal circle ...
September 30, 2010

Physics
A bob of mass = 0.250 is suspended from a fixed point with a massless string of length = 23.0 . You will investigate the motion in which the string traces a conical surface with half-angle = 25.0. What tangential speed must the bob have so that it moves in a horizontal circle ...
September 30, 2010

social studies
Can you please help me write a funny story using these ten(10) words,about,shape,house,urban,suburban,value,what,when,contrast and said.
September 24, 2010

chemistry
What is the total vapor pressure4 at 20° C of a liquid solution containing 0.30 mole fraction benzene, C6H6, and 0.70 mole fraction toluene, C6H5CH3? Assume that Raoult’s law holds for each component of the solution. The vapor pressure of pure benzene at 20° C is ...
September 14, 2010

math
if a roof has a pitch of 5 degrees and the horizontal lenght is 5.29 metres how high is the vertical?
September 13, 2010

math
Give your own example of a function using a set of at least 4 ordered pairs. The DOMAIN will be any four integers between 0 and +10. The RANGE will be any four integers between -12 and 5
September 11, 2010

Amercain history
Due to the costs of production, the major news source that would NOT emerge as a major entity until the creation of cable television would be: Answer ABC. FOX. CBS. NBC.
September 7, 2010

College Chemistry
In this lab: we demonstrated the method of evaporation of a saturated sodium chloride solution. The following question ask: 1) why is sodium chloride chosen for the solute? 2)Suggest reasons why the following were not chosen for the solute? a)Calcium carbonate (CaCO3)= b)...
September 4, 2010

vocabulary
a group of similar things together is called?
September 2, 2010

4th grade
what part of speech is batteries
September 1, 2010

social studies
thats what i thought too but I just used Monarchs for the king question and the colonies for Colubus founded the first spanish "colony" in the americas. appreciate the help
August 23, 2010

social studies
middle passage monarch missionary mayflower compact northwest passage colony city-state conquistador parliament ..thanks for the help
August 23, 2010

social studies
profits from trade helped strong ??? develope in east africa
August 23, 2010

7th grade social studies
in the feudal system of Europe, lords owed their loyalty to the ???
August 23, 2010

graphing an equation
how would you graph 12x-3y=7 and x=2+13y?
August 22, 2010

college
explain why the graph of f(x)=(x+3)^2-4 looks similar to graph of f(x)=x^2
August 18, 2010

calculus
Use the ratio test to determine whether each series is convergent or divergent. 4/(1*2*3) + 8/(1*2*3*4) + 16(1*2*3*4*5) + ... How exactly do I do this? The example problem says to first find the nth term, but I don't know how. Help is much appreciated.
August 13, 2010

Algebra
Please Help me with this!
August 12, 2010

Algebra
Find the variation constant and an equation of variation where y varies directly as x and y=50 when x=10
August 12, 2010

Battle of jericho(book0
the hazing was all the stuff the warriors of destruction put on him and made him do.
August 10, 2010

Battle of jericho(book0
i have but i didnt understand it.
August 10, 2010

Battle of jericho(book0
what is the tragedy in the book? i cant find it !
August 10, 2010

statistics
In a contest in which 8 contestants are entered, in how many ways can the 5 distinct prizes be awarded?
August 8, 2010

statistics
In a class of 50 students, 31 are Democrats, 13 are business majors, and 3 of the business majors are Democrats. If one student is randomly selected from the class, find the probability of choosing a Democrat or a business major.
August 8, 2010

Chemistry
2.7×10−39 atm
August 2, 2010

advenced functions
determine the exact value of 3^-1 -2(1/8)^-2/3
July 30, 2010

advanced functions
the height in meters, of a passenger on a Ferris wheel is given by the function h(t)=11-10cos(0.1pit), where t is the time in seconds. How long will it take a passenger to reach a height of 5 meters the first time? Express your answer to 3 decimal places.
July 30, 2010

advanced functions
simplify the rational expression x^4+3x^3-2x^2-6x/x^3-2x stating all restrictions on the variable.
July 30, 2010

Physics
(iv) A tangential force of 20N is applied to one of the masses in the plane of rotation of (iii) above for 3.0 s . (Both the instantaneous velocity of the mass and the applied force are pointing in the same direction at all times). What is the final angular velocity of the rod...
July 29, 2010

Physics
thats great thanks very much (ii) Using the parallel-axis theorem or otherwise, find the moment of inertia of the dumbbell about an axis through one of the masses but perpendicular to the rod and for this question i need : I = Ic.m. + Md2 thats right isnt it?
July 29, 2010

Physics
A dumbbell consists of two equal compact masses of 2 kg each, connected by a massless rod of length 0.8 metres. What is the moment of inertia of the dumbbell about an axis through the centre of, but perpendicular to, the rod? could someone just tell me how to get started on ...
July 29, 2010

Physics
The rigid object shown in Fig. 10-63 consists of three balls and three connecting rods, with M = 1.5 kg, L = 0.67 m, and θ = 32°. Fig. 10-63 The balls may be treated as particles, and the connecting rods have negligible mass. Determine the rotational kinetic energy of...
July 28, 2010

math
a landscape architect plans to enclose a 3000 square foot rectangular region in a botanical garden. she will use shrubs costing 25$ per foot along 3 sides and fencing costing 15$ along the fourth. write a function that gives the architect's total cost as a function of the ...
July 20, 2010

math
What is the factor or 12x^2 -78x + 93.5
July 20, 2010

Chemistry 2
Consider the system I2 (g) <----> 2I (g) with H=+151 KJ. Suppose the system is at equilibrum at 1000 degree celsius. In which way will the reaction occur under each of the following conditions? 1. 1 atoms are added? 2. The temperture is increased? 3. The temperature is ...
July 14, 2010

art 101
looking for an in-text citation for impressionism.
July 13, 2010

Chemistry
Andre did you bother checking that the answers were in a different order this quarter? dumb!@#$%^&. The answer is Low, High, High
July 12, 2010

Chemistry 2
I am still confused could you work the problem out.
July 11, 2010

Chemistry 2
The rate constant nearly doubles for some reaction when there is an increase in temperaure from 17 degree celsius to 32 degree celsius. Calculate the activation energy.
July 11, 2010

Math
Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ratio and Proportion to complete the following table. Hat Size: 6 and 7/8 Head Circumference (to the nearest 1/5 in): 21 and 3/5 Head Circumference (to the nearest cm...
July 11, 2010

Science
The effects are simple. Mass produced non-organic foods contain more toxins (herbicides, pesticides, fungicides and heavy metals). Hybrids between various plants have produced more allergies in people. Control of most of the food chain is now in the hands of multinational ...
June 24, 2010

college
A. Send the hard disk off to have what data can be recovered, recovered and pay the $1000 bucks to have it done quickly. B. Talk with the system manager about disaster management and the need for regular backups. C. Ask all staff if by chance they may have kept copies of ...
June 23, 2010

Math
Hi, how can i enter d=3.5+2sin(2pit/13),where t is time. into ti-83 calculator and sketch the graph for time 0 to 30 hours.
June 20, 2010

Math help
Hi again how can i get the growth factor by using exponential regression from the function Y = a(b^x) and i have calculated the value of a and b.
June 19, 2010

Math help
what does a and b represent in linear regression Y=aX+b.
June 19, 2010

Math help
thankyou
June 18, 2010

Math help
d=0.005s^2+0.2s where d is the stopping distance in meter and s is the speed in km per hour. use the formula to find the stopping distance when a car is travelling at 70km per hour. my answer is 38.5 is that right.
June 18, 2010

Math
The park has an area of about 25cm^2 on the map and a map has a scale of 1:15000. calculate the area of the park on the ground. give answer to Km^2
June 18, 2010

Macroeconomics
a a c d
June 7, 2010

math
I posted this early, I don't understand, Two angles are complementary. The sum of the measure of the first angle and one-fourth the second angle is 87.75 degrees. Find the measures of the angles? What is the measure of the smaller angle? What is the measure of the other ...
May 21, 2010

math
A cellular phone company offers a a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-600) + 40.95, where it is assumed that t ¡Ý600 minutes. What times will keep costs between $83.45 and $104.20? For the costs to be ...
May 21, 2010

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Next>>

Search
Members