Friday

October 9, 2015
Total # Posts: 333

**chem**

Calculate the number of kJ released for the reaction shown below, if you begin with 52 grams of fluorine (F2), and the ΔH = -542 kJ. H2(g) + F2(g) → 2 HF(g)
*September 29, 2015*

**integrated science**

with all other factors equal, if you double the balanced force on an abject of a given mass the acceleration will be?
*September 20, 2015*

**Math sequences**

Determine the smallest interger n such that 1+(4/5)+(4/5)^2+...+(4/5)^n>4.9 Please explain ti me about thisquestion. I can'tunderstand it.
*August 10, 2015*

**Science**

Omygossh thanks damon!!! :)
*June 23, 2015*

**Science**

The rider of a ferris wheel moves at a rate of 0.18 m/s2. If the rider is 5.0 m from the center of the ferris wheel, What is his/her Velocity? Can't figure out if the RADIUS and RATE are the same and Which one is the radius/rate?
*June 23, 2015*

**Math**

1.) In the following problem, write the first five of the terms of the arithmetic sequence. a1=16.5 d=0.25 2.) Find a the correct formula for the an for the arithmetic sequence. a1=-1 d=5
*April 16, 2015*

**Science**

the energy an object has due to it's motion is called a what?
*March 18, 2015*

**quick question**

could you tell me what there asking for ?
*February 23, 2015*

**quick question **

what are three programs financed from one payroll tax to which employers and employees contribute at a rate specified by law ?
*February 23, 2015*

**Math**

Find the exact value: cos(pi/16)cos(3pi/16)-sin(pi/16)sin(3pi/16)
*January 29, 2015*

**algebra**

A fuel storage tank has one supply pump and two identical outlet pumps. With one outlet pump running, the supply pump can increase the fuel level in the storage tank by 8450 gallons in 30 minutes. With both outlet pumps running, the supply pump can increase the fuel level in ...
*November 27, 2014*

**algebra**

A motorboat traveling a distance of 225 miles in 5 hours while traveling with the current. Against the current, the same trip took 9 hours. Find the rate of the boat in calm water and the rate of the current. rate of boat___ mph rate of current___ mph
*November 27, 2014*

**calc 3**

1. Evaluate the given integral by making an appropriate change of variables, where R is the region in the first quadrant bounded by the ellipse 36x^2+25y^2=1. L= double integral R (4sin(144x^2+100y^2) dA. 2. Use the given transformation to evaluate the given integral, where R ...
*November 4, 2014*

**chemistry**

Calculate the pH of 0,3g calcium hydroxide dissolved in water to give 500ml solution.
*October 26, 2014*

**college algebra**

The rate at which water evaporates from a certain reservoir depends on the air temperature. The table below shows the number of acre-feet (af) of water per day that evaporate from the reservoir for various temperatures in degrees Fahrenheit. Temperature, °F af 40 760 60 ...
*October 22, 2014*

**college algebra**

A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln is shown for various times (in minutes) in the following table. Time(min) Temperature (F) 15 2200...
*October 22, 2014*

**Physics**

A square loop of wire of side 3.0 cm carries 3.0 A of current. A uniform magnetic field of magnitude 0.67 T makes an angle of 37degree with the plane of the loop. What is the magnitude of the torque on the loop? What is the net magnetic force on the loop?
*October 13, 2014*

**Physics**

a singly charged ion of uknown mass moves in a circle of radius 12.5 cm in a magnetic field of 1.7 t. the ion was accelerated through qa potential difference of 5.7 kv before it entered the magnetic field. what is the mass of the ion
*October 13, 2014*

**Math**

Determine if correct or incorrect and justify yourself. n^3 = O(n^2 + n^3) The O is the big Oh notation.
*September 24, 2014*

**4th grade math**

If jill climbed 100 feet more, how many feet above sea level would she be?
*August 18, 2014*

**Economic**

capital rationing assumes?
*July 3, 2014*

**Economic**

a 20 year bond pays on a face value of $1,000. If similar bonds are currently yielding 9%. What is the Market value of the bond?
*July 3, 2014*

**Economic**

Suppose a firm has a constant marginal cost of$10 the current price of the product is $25, and at that price, it is estimated that the price elasticity of demand is -3.0. Is the firm charging the optimal price for the product? Demonstrate how you know.
*June 19, 2014*

**math**

20. Which of the following rectangles is similar to a rectangle that measures 13 units by 25 units?
*June 2, 2014*

**chem**

1) how many molecules are present in 1.5 moles of NaCl? 2) how many atoms of chlorine are in 19.0 grams of MgCl2?
*May 29, 2014*

**Help Mrs.Sue LA**

18.When she is shy and doesnt want the teacher to pick relates to the main idea because it shows that when the she is interviewing the teacher she figures out she can do it and becomes confident. 19.? Help please.
*May 21, 2014*

**English II**

That day I was so worried that I
*March 26, 2014*

**chemistry**

If we have a concentration of H+ at 5 x 10-2 mol/L, what is the pH value? A. -1.30 B. 0 C. 1.3 D. 2.6
*February 13, 2014*

**Math**

How would you solve 4[7^(x-2)] = 8
*January 23, 2014*

**Chemistry**

118.2
*January 19, 2014*

**English**

Help please!!!
*January 12, 2014*

**English**

What does this quote mean? “Stars got tangled in her hair whenever she played in the sky.”
*January 12, 2014*

**Physics**

two hundred fifty grams of iron is heated from 27 degree Celsius to 300 degree Celsius . how much ice can be melted and raised to a temperature of 27 degree Celsius by hot iron?
*November 17, 2013*

**Physics**

An electric heater warms a large 0 degree Celsius block of ice at the rate of 200J/s . calculate the mass of the ice that melts in 10 minutes
*November 17, 2013*

**algebra**

A car travels down the highway at speeds between 50 miles per hour and 65 miles per hour. If the car travels for 4 hours, write an expression that represents the distance, d, the car has travelled.
*November 1, 2013*

**Chemistry**

Oh, thank you!
*October 28, 2013*

**Chemistry**

What is the electro-negativity of NO ? (Nitric oxide)
*October 28, 2013*

**Geometry**

Use the Pythagorean Theorem to find the height / bases in each triangle. Then apply formula for area - b(h)/2
*September 30, 2013*

**Pre-Calculus**

C(x) = 14 ( 150) + 6 (230-150) + 3x
*September 30, 2013*

**Math**

A spherical balloon is being inflated. Estimate the rate at which its surface area is changing with respect to the radius when the radius measures 20 cm.
*September 22, 2013*

**Math**

How do you factor 2a^2 - 1 ?
*June 4, 2013*

**Math**

APPLE + ORANGE
*May 13, 2013*

**Math**

Find a polynomial whose zeroes are double the zeroes of P(x)=x^3-7x^2-5x+2.
*March 10, 2013*

**Financial Mgmt.**

Nachman Industries just paid a dividend of D0 = $1.75. Analysts expect the company's dividend to grow by 30% this year, by 10% in Year 2, and at a constant rate of 5% in Year 3 and thereafter. The required return on this low-risk stock is 9.00%. What is the best estimate ...
*March 5, 2013*

**english**

did you get this answer?
*February 6, 2013*

**chemistry**

how to prepare and calculate 10%,20% and 30% of phosphoric acid from the concentrated? Meaning that if 10% = 10%phosporic acid+90% of water. let say i want to prepare in 250ml volume.
*January 29, 2013*

**chem**

When saccharin is added to pure water, the freezing point of the resulting solution drops to -5.0C, Calculate the freezing point depression of the aqueous saccharin solution. Note: freezing point of pure water is O.0C... Stuck thanks so much!
*January 16, 2013*

**Economics**

how did the wizard of oz(the movie) relate to the social and economic texture of america?
*January 10, 2013*

**Science Help**

It is a mini one, like a toy car.
*December 29, 2012*

**Science Help**

Please help , I need to make a solar powered car. Where would I be able to get 3v motors ?
*December 29, 2012*

**Physics**

A mountaineer
*December 6, 2012*

**statistics**

test the claim that less than 30% of the students in class own a car at the 0.10 significance level.
*December 5, 2012*

**Chem**

a 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml. the mass of the water, flask, and metal is 268.5g. if the mass of the flask is 139.3g and the density of water is 1.000g/ml, the density of the ...
*December 5, 2012*

**math**

please help
*November 15, 2012*

**math**

500
*November 1, 2012*

**English**

Cradle!
*November 1, 2012*

**AP Physics B**

Use the equation m1u1 + m2u2 = m1v1 + m2v2 (mass 1 x its initial velocity + mass 2 x its initial velocity = mass 1 x its final velocity + mass 2 x its final velocity)
*November 1, 2012*

**5th grade math**

1. Find the area 2. Divide it by 4 3. Thats how many tulips!
*November 1, 2012*

**English**

Yes, B.
*October 30, 2012*

**math**

1.802752386 x 10 ^11
*October 30, 2012*

**math**

1 pack = 5 doughnuts ? pack = 2587 2587/5 = 517.4 Round it... 518 packs Hope this helped!
*October 30, 2012*

**Physics**

b. First law of motion - All material objects will remain in rest or motion in a straight line unless compelled by an unbalanced force. Its direction is changing = new force.
*October 30, 2012*

**Steve 3 more questions.**

8, 2 0, 4 -1, -2 5, -5 ..Please recheck these
*October 30, 2012*

**Steve 3 more questions.**

18 a Cinema A - 66/12 = 5.5 Cinema B - 28/5 = 5.6 Cinema A is cheaper. b) you save 10 cents! ( 5.6-5.5)
*October 30, 2012*

**Math**

5/13
*October 30, 2012*

**elementary**

Is that really me? I hope you liked the gift from me.
*October 30, 2012*

**Physics**

You are looking for range. Range = Vh x t Vh = 30 m/s t= ? We know d= 50 m, viv = 0 m/s a=9.8 d=vit + 1/2 at ^2 50=0 + 1/2 9.8 t ^2 50 = 4.9 t^2 t = 3.1 s Range = (30) (3.1) = 95.8 m Hope this helped !
*October 30, 2012*

**Physics**

An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from the moment the cable ...
*October 29, 2012*

**Physics**

An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from the moment the cable ...
*October 29, 2012*

**English 9**

easy going - feather ?
*October 29, 2012*

**science**

a piece of metal weighs
*October 26, 2012*

**math**

Point A(8, –10) is reflected over the y-axis. Write the coordinates of A'.
*October 3, 2012*

**Economics**

Use supply and demand economic theory and diagram to explain why the prices of houses has changed so much over the last 3 years. I just need topics to use to write about
*September 16, 2012*

**Economics**

Use supply and demand economic theory and diagram to explain why the prices of houses has changed so much over the last 3 years. I just need topics to use to write about
*September 16, 2012*

**Physics**

The fastest sustained runner is the pronghorn antelope, capable of running at 55 min/h for 1/2 mile. How long does it take this antelope to run the. 1/2 mile?
*September 11, 2012*

**Physics**

when driving at night at a speed of 80 km/hr, a deer suddenly appeared and frozen in your head light. The distance between your car and the deer was 45 meters at the moment you start to break your car as hard as possible in order to avoid the accident Assume that you could ...
*September 1, 2012*

**Science**

secret
*July 6, 2012*

**algebra**

put 1/3 4/6 1/2 5/6 1/6 in order
*July 2, 2012*

**management**

the american federation of labor was formed under the leadership of who?
*June 22, 2012*

**management**

according to -theory, employees compare the inputs and outputs of other employees doing similar jobs. unfavorable comparisons may lead to slacking off on their work or asking a supervisor for either an explanation or a raise.
*June 22, 2012*

**management**

regarding management and leadership, which statement is most accurate?
*June 22, 2012*

**Chemistry**

suppose you wanted to heat a mug of water 250 ml for room temperature 25c to 100c to make a cup of tea. how much energy (in units of calories and joules) would you need form the microwave?
*May 26, 2012*

**books**

thank you! i dont know how to start it. like the first sentence. do i just dive right in or start with something else?
*May 23, 2012*

**books**

In the romantic tragedy, William Shakespeare tells the audience, through the two young lovers, Romeo and Juliet, that love can make you do crazy things that you wouldn’t otherwise do.
*May 23, 2012*

**books**

Romeo and juliet i need a conclusion for my essay the theme is how love can make you do crazy things. so far my 3 paragraphs conclude of 1 romeo climbing to juliets balcony 2 they get marrried 3 they kill themselves now i just need a conclusion
*May 23, 2012*

**United States History**

the least controversial actions of president bush regarding? a. war in iraq b. hurricane katrina c. immigration reform d. economic crisis of 2007-2009 e. "no child left behind" educational program I think the answer is E?
*May 5, 2012*

**Chemistry**

1 mol=molar mass in grams 6.022*10^23=1 mol all should cancel out whats left is answer
*April 23, 2012*

**History**

How were the issues of the civil war similar to those of the american revolution.
*April 9, 2012*

**History**

Was the republican party consistent in its policies from the 1850s-1877?
*April 9, 2012*

**History**

civil war ---> triumph of american democracy over european aristocracy. I'm supposed to write a paragraph about this, but I don't understand it.
*April 8, 2012*

**History**

What struggle was there between the president and Congress for dominant political power within the federal government from 1850-1868? I know there was the reconstruction problem and how congress basically took over. What else?
*April 8, 2012*

**Pre-Cal**

I'm trying to put this parabola in standard form which is: (y-k)^2=4p(x-h) The equation is x=(1/12)(y-2)^2 +6 Here is what i have so far: x=(1/12)(y-2)^2 +6 -6 -6 x-6=(1/12)(y-2)^2 *12 *12 Would it be 12x-6 OR 12x-72? thanks
*April 3, 2012*

**Hi**

The interests of the West were satisfied by neither the Jeffersonians nor the Federalists between 1789 and 1815. I'm supposed to write a paragraph about it, but I don't understand what it is asking...
*March 27, 2012*

**History**

Why is the War of 1812 called the second war of independence? I have b/c it was fought against the same country and it made the U.S independent and more respected. I need more, help please!
*March 27, 2012*

**history**

What caused Jeffersonian Democracy to develop?
*March 26, 2012*

**biology**

thanks
*March 20, 2012*

**biology**

what is the different between diet and health.
*March 20, 2012*

**abstract algebra**

Suppose K = {{2,3,4,5,6,7},{2,5,7,8,12},{1,2,3,5,7,9,13,20}}. Find three upper bounds for K in P(N) and three lower bounds. Does K have a least upper bound? Does K has a greatest lower bound?
*February 18, 2012*

**abstract algebra**

Suppose K = {{2,3,4,5,6,7},{2,5,7,8,12},{1,2,3,5,7,9,13,20}}. Find three upper bounds for K in P(N) and three lower bounds. Does K have a least upper bound? Does K has a greatest lower bound?
*February 18, 2012*

**Chemistry Help Please :)**

thanks
*February 12, 2012*