Saturday

March 28, 2015

March 28, 2015

Total # Posts: 251

**Math Help**

Hi! I need help with this practice problem. My teacher gave us the answer, "2cot u" BUT she wants us to figure out why that's the correct answer. I'm having some trouble with this and could really use some help. Thank you! Problem: 1+ sec u/tan u - tan u/1+...
*February 7, 2015*

**Chemistry**

The following questions relate to the chemical equation shown below. Since this is a multi-stage question, be sure to write down the balanced equation and the values for deltaHo and deltaSo before proceeding. A2(g) + 3 B2(g) → 2 AB3(g) deltaHo = -217 kJ mol-1 deltaSo = -...
*January 11, 2015*

**Chemistry**

Part 1 of 2 Write the balanced molecular equation for the reaction between iron metal (the nail) and aqueous copper II sulfate and classify this reaction. Include the states: solid (s), liquid (l), aqueous (aq), or gas (g). Use your observations to help you determine the ...
*January 11, 2015*

**Chemistry**

A cell exhibits a standard Ecell of 0.35V at 298K. What is the value of the equilibrium constant for the cell reaction if n = 2?
*January 11, 2015*

**CALCULUS - PLEASE HELP!**

Nice one!
*December 2, 2014*

**Computers**

Sell it and get a proper PC.
*December 2, 2014*

**physics**

A ball is rolling on a table and leaves the end side of the table with a velocity of 1.5 m/s. The table is 0.70 m high and the ball has a mass of 0.850 kg. What's the speed of the ball when it hits the ground? What equation should I use?
*October 12, 2014*

**Algebra**

Let "m" be the number of modern rockers. INEQUALITY: 15c+12m<=3000, c>=0, m>=0
*September 29, 2014*

**Law of Sines**

And steve sorry I didn't read the whole answer.
*September 6, 2014*

**Law of Sines**

Oh nvm thanks Damon.
*September 6, 2014*

**Law of Sines**

Thanks! I should have mentioned this in the question, but the answer sheet asks for two values of angle A rather than 1.
*September 6, 2014*

**Law of Sines**

In Triangle ABC, a=15cm, c=9cm, and angle C= 35 degrees. Find b and angle b. (Recall sin theta= sin (180 degrees-theta). I'm not sure how to approach this.
*September 6, 2014*

**Physics**

The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti -node
*August 22, 2014*

**physics**

According to the question:the hill rises at 37.7m to the vertical [y-axis] and 100m to the horizontal[x-axis] in the process a right-angle triangle is obtain and an angle of 90 is also obtain. 90 is the angle inclined at the horizontal
*August 21, 2014*

**Trigonometry**

If the distance covered by an object in time t is given by s(t) = t^2 + 5t , where s(t) is in meters and t is in seconds, what is the distance covered in the interval between 1 second and 5 seconds?
*July 14, 2014*

**Physics**

Sorry, there was a typo. *51 degrees opposite the 150 cm side.
*July 6, 2014*

**Physics**

What is the value of each of the angles of a triangle whose sides are 95, 150, 190 cm in length? I have tried to do this problem, don't get me wrong, but I don't really know where to go. Can someone tell me how to even approach this problem? The textbook states that ...
*July 6, 2014*

**Math**

Roberto Wins- 1/4 Roberto Loses- 3/4
*July 5, 2014*

**english**

Your question is confusing. Please go further in detail.
*July 5, 2014*

**Ratio of two triangles**

What would the ratio be if the first triangle has sides of 4cm, 8cm, and 12cm and the second triangle had sides of 1cm, 2 cm, and 3 cm? Would the ratio be 4:1 or 1:1/4?
*May 13, 2014*

**Physics**

please help asap
*March 24, 2014*

**Physics**

A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter is 70 % of the way ...
*March 24, 2014*

**Math**

A(n)=A(n-1)-4;a(1)=8
*January 23, 2014*

**Science**

Hannah is comparing a rock from a riverbed and a rock from deep underground. One is very smooth, and the other has very rough edges. Explain why each rock was probably found in that location.
*January 9, 2014*

**Earth Science**

ummm A?
*January 9, 2014*

**Earth Science**

My first guess was A but then i read B this is confusing
*January 9, 2014*

**Math Help**

Was #1 correct?
*November 19, 2013*

**Math Help**

I got #1 C, #2 D and #3 $6.50?
*November 19, 2013*

**Math Help**

1.) You have $22 in your bank account, and you deposit $11.50 per week. Your cousin has $218 in his bank account and is withdrawing $13 per week. The graph of this problem situation intersects at x=8. What does this mean? A. In 8 weeks, you will have triple the amount of money...
*November 19, 2013*

**physics**

alkjfalkjfadfa
*September 16, 2013*

**CHEMISTRY**

How to prepare a 500ml 0.2M NaOH solution from 2.0M NaOH solution
*July 10, 2013*

**Stats**

A production process produces an item. In a recent study, the company found that 20% of all items produced were defective. Each item is inspected before being shipped. 10% of the items were misclassified( labeled as defective when they were good or labeled good when they were ...
*April 23, 2013*

**Statistics**

A production process produces an item. In a recent study, the company found that 20% of all items produced were defective. Each item is inspected before being shipped. 10% of the items were misclassified( labeled as defective when they were good or labeled good when they were ...
*April 21, 2013*

**science**

an object with a volume of one cu ft , weighing 150 lbs. is embedded in the sediment at a depth of 99 fy. in the ocean harbor. the object is best lifted to the surface by
*April 16, 2013*

**Macroeconomics**

Graph the following aggregate supply and demand curves (be sure to draw to scale). Real GDP (in $ trillions) Price Level Supplied Demanded Increase / Decrease 100 4 16 110 10 15 140 14 12 200 15 6
*April 15, 2013*

**Math**

An airplane is flying at a velocity of 300km/h S30degW in a wind blowing at a velocity of 50km/h S20degE. What is the true speed and direction of the plane?
*April 4, 2013*

**chemestry**

How many grams of O2 are needed to produce 45.8 grams of Fe2O3 in the following reaction? 4Fe(s)+3O2(g) - 2Fe2O3(s)
*February 27, 2013*

**quantitative rsearch**

A manufacterer of computers designed to aid social scientists in analyzing rsearch data claims that are operational for at least 80% of the time . during the course of the year one computer was operational for 270 days. test, at the 1% CONFIDENCE LEVEL, whether the ...
*February 27, 2013*

**physics**

IF A 0.5 Kg baseball(at rest) is hit by a bat with a force of 200.0 N what is the magnitude of the baseball just as it is leaving the bat?
*February 26, 2013*

**Science(applied physics)**

vi= 18 m/sec constant vj= 24-gt= 24-9.8*6= 24-58.8= -34.8 m/sec v^2= vx^2+vy^2= 18^2+(-34.8)^2=1535.04 KE= 1/2mv^2 KE= .5*1*1535.8= 767.9 joules
*February 17, 2013*

**Physics**

Time for asteroid = (RadiusEarthOrbit/RadiusAsteroidOrbit)^3/2 * Time for Earth Ta= (475/150)^3/2 *1 = 5.54 yr
*February 12, 2013*

**Pre Calculus**

There are ten equal parts to a circular track for 2 toy cars and the distance from the inner to the outer is 3.4 inches. What is the width of the track?
*January 29, 2013*

**maths**

both my hundreds and units digits are one-half of my tens digit.the sum of my three digits is 16. what am i?
*January 27, 2013*

**Physics**

Differenciate between speed and velocity
*January 22, 2013*

**Can someone help me?!**

Math
*January 3, 2013*

**physics**

A 224 g particle is released from rest at point A along the diameter on the inside of a fric- tionless, hemispherical bowl of radius 44 cm. The acceleration of gravity is 9.8 m/s2 .
*December 14, 2012*

**Physics**

A bead slides without friction around a loop- the-loop. The bead is released from a height of 12.9 m from the bottom of the loop-the- loop which has a radius 4 m. The acceleration of gravity is 9.8 m/s2 . A 4m 12.9 m What is its speed at point A ? Answer in units of m/s
*December 14, 2012*

**Physics**

You have a 40 inch wheel tow 20 inch wheel to a 5 inch wheel how many revolutions does the 5 inch wheel have to make to make the 49 inch wheel rotate 1revolution?
*October 19, 2012*

**Physics**

A 345N load is suspended from a cable. What is the acceleration of the load if the tension in the cable is 275N£¿
*October 13, 2012*

**Algebra**

solve by elimination: 6a+2b = -48 -6a+b = 57 What is the solution set ( , )?
*October 11, 2012*

**Math241**

How do I solve x^2+4y^3=-828 at pont (-6,-6) The slope=
*October 4, 2012*

**Pre-Calc**

f(x)=(24x3+68x2+24x−32)/(4x3+56x2+236x+280) I need help finding the roots and the hole for this problem.
*September 30, 2012*

**Math**

A salesperson sold 4 cars for a total value of 54,000 dollars. Her co-worker sold 8 cars for a total the value of d dollars. Write an algebraic expression that represents the combined value of the cars sold by the salesperson and her co-worker?
*September 17, 2012*

**Physics**

whoops, I noticed I used 3.4 seconds not 3.14 y= .5*9.8* 3.14^2= 48.31
*September 12, 2012*

**Physics**

If ball1 has been dropping for 3.4 seconds, then ball1 has dropped: y= vo*t+(1/2)*g t^2 where vo= 0.0 since is was "dropped", not thrown. or y=.5*9.8*3.49^2= 59.68meters
*September 12, 2012*

**terminal velocity**

A que ball dropped from a third floor window will reach what speed/velocity? Is that high enough to reach terminal velocity?
*August 23, 2012*

**math**

Do the equations x = 5y + 3 and x = 5y – 3 have the same solution? How might you explain your answer to someone who has not learned algebra? 200 words or better
*August 21, 2012*

**Government**

If you asked the same question about an upcoming election to many people,you would be conducting a? A.Scientific poll B.Straw Vote C.Public Agenda D.Representative Sample
*May 10, 2012*

**Physics**

It's all good to say that Brandon but the fact is you googled as well and came to this link. Hahahahaha
*April 14, 2012*

**Science**

I need help in Science Project. The topic is called "How does the size affect the force of magnetism". I didn't see any procedure in how to do this particular topic can you help me?
*April 8, 2012*

**Statistics**

The Deborah Heart Institute performs many open-heart surgery procedures. Recently research physicians at the Institute developed a new heart bypass procedure that they believe reduces the average length of recovery. The hospital board will not adopt the procedure unless there ...
*April 4, 2012*

**Maths**

14 metres of rope costs €9.52. If Joe bought 21 metres, how much change out of €20.00 do Joe get? Is there a shorter way of doing this other than dividing, multiplying and then subtracting?
*March 22, 2012*

**algebra**

4r - 10r + 24
*March 4, 2012*

**algebra**

The solution to this i believe is no solution need help. -2x+2>-2x-3
*February 19, 2012*

**spanish**

Translate to english? Viajaré al Caribe el próximo verano. En este momento estoy terminando mi tarea. La próxima semana visitaré a mi abuela. Hace un mes comenzaron las vacaciones de verano. Hace media hora comenzó a llover.
*January 17, 2012*

**chemistry**

Oh reacts with Ca which decreases [Ca] and pushes reaction right CaC2O4<>Ca+C2O4
*January 15, 2012*

**History**

thank you
*January 5, 2012*

**History**

Both were a cry for independence and freedom. Is that correct
*January 5, 2012*

**History**

How was the writing of the Grito de Dolores similar to the writing of the petition by the First Continental Congress?
*January 5, 2012*

**Algebra**

(8.1 . 10^8) . (4.2 . 10^3)
*January 2, 2012*

**FRATION**

12/345
*December 8, 2011*

**Math-Statistics**

Find a confidence interval for ƒÊ assuming that each sample is from a normal population. a. P x = 14, ƒÐ = 4, n = 5, 90 percent confidence b. P x = 37, ƒÐ = 5, n = 15, 99 percent confidence c. P x = 121, ƒÐ = 15, n = 25, ...
*December 6, 2011*

**physics**

What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6 106 m/s?
*December 5, 2011*

**Physics**

What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6*10^6 m/s?
*December 4, 2011*

**Physics**

If Galileo and his assistant were 16 km apart, how long would it take light to make the round-trip? How does this time compare with reaction times of about 0.4 s?
*November 27, 2011*

**Retired 71 years old**

If I borrowed $78,000 from a bank and had perfect credit; How much interest would I have to pay in Dollars and cents? The loan is for 7 years
*November 25, 2011*

**English**

Rewrite the passage below correcting any errors of grammar and usage The mechanic drove out the car to Joe that was lubricated. As a matter of fact, he has not done enough on it as Joe has expected. But whatever it was he decides to take it like that. The experience with the ...
*November 18, 2011*

**geometry**

What happened when two fruit companies merged?
*November 16, 2011*

**Geometry**

Name the properties that justify the steps taken. AB=EF; thereforeAB+CD=EF+CD
*November 12, 2011*

**Physics**

What is the fundamental frequency for a 62 cm banjo string if the speed of waves on the string is 470 m/s?
*November 7, 2011*

**Physics**

How long is a wavelength of infrasound with a frequency of 4 Hz?
*November 7, 2011*

**Physics**

Radio waves travel at the speed of light, which is 3.00 108 m/s. What is the wavelength for a FM station broadcasting at 105.9 MHz (the prefix M is "mega" and means 106)?
*November 7, 2011*

**Physics**

What is the maximum total force exerted on a 78 kg astronaut by her seat during the launch of the Space Shuttle?
*October 10, 2011*

**statistics**

the mean is based off of 3 months. multiply it out to get the mean for a correct time period (1.5x4=6). I use the Poisson function in excel. Mean is equal to 6 and x is equal to 12 and 0. True is up to a certain number (up to 12) and false is exactly a certain number (exactly ...
*September 30, 2011*

**Chemistry**

Well Kae, 3KOH + Fe(NO3)3 -> 3KNO3 + Fe(OH)3
*September 29, 2011*

**physics**

A student of weight 990 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?
*August 30, 2011*

**math**

a 4 digit number my 2 nd digitis twice my 3 digit the sum of all my digits is 3 times greater than my last digit the productof my 3rd and 4th digits is 12 times greater than the ratio of my 2nd to 3rd whats my number?
*August 18, 2011*

**math**

solve by the elimination method: 9x-9y=18 7y-3x=-8 please solve step by step thank you for your help
*July 25, 2011*

**chemistry**

Calculate the number of moles of FeSO4 in 25cm3 of a 0.2mol dm3 solution
*June 21, 2011*

**Chemistry **

A gas has a volume of 50.0 cm3 at a temperature of -73°C. What volume would the gas occupy at a temperature of -123°C if the pressure stays constant
*June 12, 2011*

**math**

The best answer is D - 6. The two negatives cancel each other out, making the sum 18 divided by 3, equaling 6.
*May 20, 2011*

**college chem**

The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3 M(NH3)2+ K1 = 102 M(NH3)2+ + NH3 M(NH3)2 2+ K2 = 103 M(NH3)2 2+ + NH3 M(NH3)3 2+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 × 10&#...
*April 24, 2011*

**physics**

What is the average current through a conductor that carries 4 375C during a 2 min time period?
*April 13, 2011*

**english**

What opinion might they have of the author? What could you as a writer do to prevent this problem?
*March 28, 2011*

**english**

How might readers react if the topic sentences in an essay did not coincide with the supporting points, and why would their reaction be justified?
*March 28, 2011*

**business**

Direct verse indirect cost Estep Construction Company is composed of two divisions: (1) Home Construction and (2) Commercial Construction .The Home Construction Division is in the process of building 12 houses and the Commercial Division is working on 3 projects. Cost items of...
*March 26, 2011*

**chem101**

propyl Bromide reacts with Mg, Propanone, H+ to yeild what?
*March 26, 2011*

**chem101**

Hydrogen gas can be produced in the lab by the reaction of magnesium metal and hydrochloric acid. Mg + 2 HC -> MgCl2 + H2 How many grams of hydrogen gas will be produce if 5.00 g of magnesium metal is dissolved in excess acid.
*March 24, 2011*

**The world History**

where are the questions to assignments 1-5 world history number007678
*March 6, 2011*

**chem**

What is the [OH-] for a solution at 25°C that has [H3O+] = 8.23 × 10-2 M?
*March 5, 2011*