Wednesday

October 22, 2014

October 22, 2014

Total # Posts: 384

**Chemistry 2**

How many cans ( each containing 14.0 oz of propane) would be required to convert 41.7 lbs of ice at -15.0 C to water at 100 C ( the boiling point at standard pressure)
*February 2, 2012*

**Trigonometry**

The tires on a car have radius 14 inches. Find the angular speed of the car tire in revolutions per second when it is traveling 70 mph. Find the angular speed at 80 mph. The tires on a car are 15 inches. Find the linear speed of the car when the tires are rotating at 900 ...
*January 21, 2012*

**Geometry**

Y is the midpoint of segment XZ. If XZ is 64 units long, how long is
*January 18, 2012*

**Physics**

Ok Here are my answers, if you can give me any more help it would be greatly appreciated. 1. 1000+1200=2200 2. Fw = ma 1000*9.8 m/s^2 = 9800 1200*9.8 m/s^2 = 11760 Fw = 21,560 3. Momentum = mv 1000*7 + 1200*6 7000 + 7200 Momentum = 14,200 kg m/s 4. 14,200 / m1+m2 14,200 / 1000...
*January 6, 2012*

**Physics**

Sorry, I can do part 1 and 2 relatively easily. However, I suck at physics and was honestly hoping to receive an answer like the one you gave me. I just wanted to know how to do it, not necessarily get the answer. Thanks
*January 6, 2012*

**Physics**

A 1000 kg car is moving at a constant speed of 7 m/s when it hits the back bumper of another car with 1200 kg of mass moving in the same direction at a constant speed of 6 m/s. As a result of the collision both bumpers get coupled. Show all work and calculations. 1. What is ...
*January 6, 2012*

**Economics**

Supply is Demand is Scenario A elastic elastic Scenario B elastic inelastic Scenario C inelastic elastic Scenario D inelastic inelastic Which scenario describes the market for oil in the long run? A. A B. B C. C D. D
*November 29, 2011*

**Economics**

Sandra purchases 5 pounds of coffee and 10 gallons of milk per month when the price of coffee is $10 per pound. She purchases 6 pounds of coffee and 12 gallons of milk per month when the price of coffee is $8 per pound. Sandraâ€™s cross-price elasticity of ...
*November 29, 2011*

**Economics**

Which of the following would not interfere with market equilibria? A. a minimum wage B. a rent control C. a non-binding price floor D. a binding price ceiling
*November 29, 2011*

**Economics**

The price received by sellers in a market will decrease if the government Answer A. imposes a binding price floor in that market. B. decreases a binding price ceiling in that market. C. decreases a tax on the good sold in that market. D. increases a binding price floor in that...
*November 29, 2011*

**Economics**

Suppose the government has imposed a price floor on the market for soybeans. Which of the following events could transform the price floor from one that is not binding into one that is binding? A. Farmers use improved, draught-resistant seeds, which lowers the cost of growing ...
*November 29, 2011*

**Math**

Also, there is a smaller similar triangle with the sides of 5, 6, and 9. This is sted in the problem.
*November 1, 2011*

**Math**

The perimeter of a triangle is 50. What steps do I need to take to find the length of the sides?
*November 1, 2011*

**Russian**

russian farmland has been damaged by
*October 24, 2011*

**High School **

based on my school they look at the star tests from 7th grade because when you go to 9th grade the star test scores wont be out by then
*October 20, 2011*

**Algebra**

How do i find the slope and y- intercept of 5X+2Y=7 ?
*October 19, 2011*

**physics**

A mass of 0.04 kg is attached to a cord passing through a small hole in a frictionless, horizontal surface. The mass is initially orbiting with speed 4.9 m/s in a circle of radius 0.4 m. The cord is then slowly pulled from below, decreasing the radius of the circle to r2 = 0....
*October 19, 2011*

**Math**

julia needs to purchase a ladder that just reaches the top of a 16 foot building. if the bottom of the ladder will be placed 12 feet from the base of the building how long should julia's ladder be?
*October 8, 2011*

**Physical Science**

3.B
*September 26, 2011*

**MAth (make equation true)**

PLease help 5 + 4 x 3 - 1 = 18 use grouping symbols to make each equation true.
*September 14, 2011*

**science**

how long does it take to dissolve 3 ice cubes in a glass of water
*July 27, 2011*

**Math**

Sorry, shared computer at school, but can you help???
*July 27, 2011*

**Math**

Tickets to a game are $5 for adults and $2 for children. Six hundred tickets are sold for a total of $2160. How many adult tickets and how many children's tickets have been sold?
*July 27, 2011*

**math**

d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didnt get like the answer. [ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]
*July 22, 2011*

**chemistry**

Starting with a 2.0 M NaOH solution, determine how you would prepare 1 L of a 0.1 M NaOH solution.
*June 27, 2011*

**physics (special relativity)**

A single photon in empty space is transformed into an electron and a positron, each with rest mass m(e). (a) show that the folowing process is dynamically impossible. (b) Explain in detail how this process can be made possible (c) for part b what would be the minimum photon ...
*June 8, 2011*

**Physics**

A uniform disk of mass 2kg and radius 10.0cm is spinning on a fixed frictionless bearing at 3 revolutions/second. A think cylindrical shell of mass 2kg and radius 10cm is carefully dropped onto the spinning disk so that they end up spinning together, with their edges ...
*May 15, 2011*

**Math 120**

A recent study of 750 Internet userd in Europe found that 35% of Internet users were women. What is the 95% confidence interval of the true proportion of women in Europe who use the Internet? A)0.321<p<0.379 B)0.316<p<0.384 C)0.309<p<0.391 D)0.305<p<0.395
*May 3, 2011*

**Math 120**

D The value of a correlation coefficient can only be in the range of -1<x<1
*May 3, 2011*

**Math 120**

Which of the followinf could not be the value of a correlation coefficient? A) -0.683 B) 0.197 C) 1.000 D) -1.369
*May 3, 2011*

**Chemistry**

Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
*April 29, 2011*

**Chemistry**

Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
*April 29, 2011*

**Chemistry**

Should it be 4 then?
*April 25, 2011*

**Chemistry**

Functional groups 1. are the repeating unit of polymers. 2. are groups of atoms whose chemical prop- erties are pretty much independent of their chemical environment. 3. perform specific biological functions using molecular recognition. 4. are a fictitious concept like ...
*April 25, 2011*

**Algebra**

Use Gauss-Jordan to solve 3x + 2y = -4 4x – 2y = -10
*April 25, 2011*

**Chemistry**

How do you figure out hydrate formulas?
*April 23, 2011*

**physics**

AC power in the United States has 60 cycles per second. What is the period (in seconds) for this current? Round your answer to 3 decimal places.
*April 11, 2011*

**Phyiscs - Electro static**

Particles 1 and 2 of charge q1 = q2 = +3.20 x 10-19 C are on a y axis at distance d = 22.0 cm from the origin. Particle 3 of charge q3 = +9.60 x 10-19 C is moved gradually along the x axis from x = 0 to x = +5.0 m. At what value of x will the magnitude of the electrostatic ...
*April 2, 2011*

**earth science**

what is the tectonic setting of seattle washington?
*March 28, 2011*

**chemistry**

A certain voltaic cell has a standard cell voltage of 1.22 V, and 3 electrons are transferred in the overall cell reaction. What is the value of the thermodynamic equilibrium constant for this cell reaction at 298K?
*March 15, 2011*

**computer science**

Write a complete C# program that displays a menu comprising of the followings: Main Menu 1) Calculate Fuel Consumption 2) Calculate Weekly Wages 3) About This Program 4) Exit Program Enter your Choice: Calculating Fuel Consumption When the user chooses this option, the program...
*March 7, 2011*

**computer Science (need answer ASAP)**

Write a complete C# program that displays a menu comprising of the followings: Main Menu 1) Calculate Fuel Consumption 2) Calculate Weekly Wages 3) About This Program 4) Exit Program Enter your Choice: Calculating Fuel Consumption When the user chooses this option, the program...
*March 6, 2011*

**Chemistry**

Aluminum metal is used in many products. It quickly reacts with oxygen in the reaction 4Al (s) + 3O2 (g)--> 2Al2O3 (s). Which component is different on each side of the equation arrow? a. mass b. atoms c. moles d. all are the same.
*February 16, 2011*

**Math**

Acceleration due to gravity
*February 6, 2011*

**6th grade math**

107.25/ 0.03
*January 24, 2011*

**science**

In the system shown in the figure , block A has mass m_A = 2.08 kg, block B has mass m_B = 0.370 kg, and the rope connecting them has a nonzero mass 0.203 kg. The rope has a total length 1.03 m and the pulley has a very small radius. Let d be the length of rope that hangs ...
*January 18, 2011*

**Math**

What is the circumference of a circle with a diameter of 10 m.
*January 17, 2011*

**m**

What is the sum of the measures of the exterior angles of an 11-side polygon, one at each vertex?
*January 12, 2011*

**Math**

I am confused, do I separate the two first?
*January 12, 2011*

**geometry**

Triangle ABC, AB=8, BC=10, and AC=12, M is the midpoint of AB, and N is the midpoint of BC. What is the length of MN?
*January 1, 2011*

**science**

What is a way to put alloy and concentration into a sentence that helps to explain solutions?
*December 30, 2010*

**science**

What is a way to put alloy and concentration into a sentence that helps to explain solutions?
*December 30, 2010*

**Calculus**

The machine earns the company revenue at a continuous rate of 62000 t + 38000 dollars per year during the first six months of operation, and at the continuous rate of $69000 per year after the first six months. The cost of the machine is $170000. The interest rate is 5% per ...
*November 30, 2010*

**Physics**

When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.370 m/s2. Block 1 has mass M, block 2 has 5M, and block 3 has 5M. What is the coefficient of kinetic friction between block 2 and the table? block 1 is haging off the table ...
*November 18, 2010*

**physics**

The figure below shows an initially stationary block of mass m on a floor. A force of magnitude F = 0.570·mg is then applied at upward angle è = 22°. (a) What is the magnitude of the acceleration of the block across the floor if (a) ìs = 0.600 and &...
*November 18, 2010*

**Physics**

i still couldnt get the answer either
*November 18, 2010*

**Physics**

is Ma the mass of block a?
*November 18, 2010*

**Physics**

the knot is inbetween block b and the wall. block a hangs from the knot. the knot is connected to the wall by a rope attached to the wall at 30 degrees from the horizontal
*November 18, 2010*

**Physics**

Block B in the figure below weighs 713 N. The coefficient of static friction between block and table is 0.20. Assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary.
*November 18, 2010*

**college**

the length of the top of a table is 3 m greater than the width. the area is 88m^2. find the dimensions of the table
*November 15, 2010*

**math**

(y plus 5)y^2 - 5y plus 25)
*November 15, 2010*

**math**

(y plus 5)y^2 - 5y plus 25)
*November 15, 2010*

**chemistry**

why is it important to record detailed observations, not just conclusions?
*October 11, 2010*

**physics**

Andy (mass 80 kg) uses a 3.0 m long rope to pull Bob (mass 60kg) across the floor (uk= .2) at a constant speed of 1.0 m/s. Bob signals to Andy to stop by plucking the rope, sending a wave pulse forward along the rope. The pulse reashes andy 150 ms later. What is the mass of ...
*September 24, 2010*

**7th grade math**

How do we set up these numbers using order of operations to get a given number???? 12,18,3,11,12 = 8
*September 22, 2010*

**7th grade math**

order of operations 11, 10, 15, 20, 3 = 6
*September 22, 2010*

**chemistry**

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 24.0 of carbon were burned in the presence of 76.8 of oxygen, 12.8 of oxygen remained unreacted. What mass of carbon dioxide was produced?
*September 17, 2010*

**chemistry**

sodium reacts completely with 0.142kg of chlorine, forming 234g of sodium chloride. What mass of sodium reacted? I know that for chemical changes the amounts should end up being equal, but I don't know how to set up the problem.
*September 17, 2010*

**Math**

What is the pattern for 3, 19, 99, 499, 2499
*September 13, 2010*

**chemistry**

So do I set this up as: 8.86*10^11m (1Gm/10^9m)=8.86*10^11/10^9 since my meters cancel? Which then gives me 8.86^20
*September 8, 2010*

**chemistry**

I am still lost on setting up the last 2.
*September 8, 2010*

**chemistry**

The other two questions that I can not set up for conversions is 8.86*10^11m converted to gigameters 1.57*10^-10m converted to picometers
*September 8, 2010*

**chemistry**

I am having a hard time with this one not sure how to set up the problem. A gas can holds 1.7gal of gasoline. What is this quantity in cubic centimeters? I know that 1gal=3.785L I know that 1L=1000cm^3 I have tried 1.7gal*3.785L/1gal=6.4345cm^3. I just can not figure out what ...
*September 8, 2010*

**science**

THANK YOU MS.SUE
*September 7, 2010*

**science**

What word means having no form?
*September 7, 2010*

**math 7th**

divide 6 into 48.. you get 8
*September 7, 2010*

**math**

How do I calcualte these conversions? 8.4cm = m 1333.8g=kg 119cm=mm 2391mL=L 3.22Mm=km 4.68fs=ps 8.86*10^11=Gm 1.57*10^-10m=picometers 381cm=in 94mm=in 5.0L=q 132kg=lbs
*September 6, 2010*

**trig**

How do I find 2 tan squared time x = sec times x -1
*August 26, 2010*

**English**

Can you tell me what words are the infintive phrase and is it a noun, adj or adv? Is it To learn and it's a noun? To learn to count in three languages is my summer goal.
*August 25, 2010*

**math**

Aki’s Bicycle Designs has determined that when x hundred bicycles are built, the average cost per bicycle is given by , where is in hundreds of dollars. How many bicycles should the shop build in order to minimize the average cost per bicycle?
*August 16, 2010*

**chemistry**

determine the end value of n in a hydrogen atom transition if teh electron starts in n=2 and the atom absorbs a photon of light with a frequency of 4.57 times 10^14 Hz
*July 5, 2010*

**CHEMISTRY**

EXPLAIN THE CHEMICAL COMPOSITION OF BOTH SIDE OF THE EQUATION BELOW NUMERICALLY WITH INTEGERS 3CaSO4+2ALCL3= 3CaCL2+AL2(SO4)3
*June 13, 2010*

**CHEMISTRY**

EXPLAIN THE CHEMICAL COMPOSITION OF BOTH SIDE OF THE EQUATION BELOW NUMERICALLY WITH INTERGERS 3CaSO4+2ALCL3= 3CaCL2+AL2(SO4)3
*June 13, 2010*

**CHEMISTRY**

EXPLAIN THE CHEMICAL COMPOSITION OF BOTH SIDE OF THE EQUATION BELOW 3CaSO4+2ALCL3= 3CaCL2+AL2(SO4)3
*June 13, 2010*

**8th grade**

how to make a double line graph to show air/water temperatures.mon.air-92 water-68tues.air-94 water-69 wed.air-88 water=70,thurs. air=85 water=72 and friday air=96,water=72
*June 9, 2010*

**biology**

Hydrogen Peroxide = Oxygen + Water
*May 11, 2010*

**physics**

When a 0.045 kg golf ball takes off after being hit, its speed is 35 m/s. A)How much work is done on the ball by the club? B)Assume that the force of the golf club acts parallel to the motion of the ball and that the club is in contact with the ball for a distance of 0.007 m. ...
*April 18, 2010*

**chemistry**

Hi, The question is, using Henry's law constant calculate the amount of Hydrogen Sulphide gas which could dissolve in 500ml of pure water (H20) placed near an active volcano assuming equilibrium conditions and ignoring any reactions with water. The atmosphere surrounding ...
*April 14, 2010*

**math**

What are the next four numbers in this sequence? 2,5,11,18,28
*April 12, 2010*

**Chemistry**

You blow me????
*April 5, 2010*

**math**

a motorboat traveling with the curent went 68 miles in 3hrs and 24mins. against the current, it took 4hrs and 15 mins to travel the same distance. find the rate of the motorboat in calm water and the rate of the current.
*March 23, 2010*

**calculus**

How do I integrate 1-e^-kt from 0 to infinity?
*March 2, 2010*

**math**

a store clerk has 600 pens in stock . he then issues 1/4 to a store . then issues another 1/6 to another store and 3/8 to the last store how much is still in stock?
*February 23, 2010*

**College Chemistry**

correct answer is 0.700 grams
*February 21, 2010*

**calculus**

What is hyperbolic sin of n? Never heard of that.
*January 26, 2010*

**calculus**

thanks, but can we leave it in that form?
*January 26, 2010*

**calculus**

Calculate he average over the given interval: f(x)=e^(-n*x), [-1,1]. I know that the average value = (1/b-a)integrate from a to b f(x)dx
*January 26, 2010*

**trig**

Given that sin = 3/5 and lies in quadrant II, find the following value. cos
*January 20, 2010*

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