Sunday

January 22, 2017
Total # Posts: 278

**science**

A(n) 0.463 kg soccer ball approaches a player horizontally with a speed of 24.4 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 16.2 m/s. What is the magnitude of the impulse delivered to the ball by the ...

*January 16, 2017*

**Science**

Nc2h2=mc2h2/fwc2h2 =220/26 =8.4615 Nco2 =8.4615x1molco2/1molc2h2 =8.4615molco2 Balance equation: C2h2 + 2o2 ----> co2+ h20

*January 14, 2017*

**Assistance on whether numbers are correct? Financi**

You would like to have $750,000 when you retire in 25 years. How much should you invest each quarter if you can earn a rate of 4.2% compounded quarterly? future value = (payment)[((1+i)^n-1)/i] 750000 = P[(1.042^(4*25)-1)/0.042] 750000 = P[1433.4] payment = $523.23...

*December 18, 2016*

**maths**

ABC is an isoscelea triangle with AB =AC and its perimeter is 64cm .the altitude from A to BC is 24cm.find the length of AC and BC?

*December 7, 2016*

**Chemistry**

How many milliliters of 2.3 M NaOH are needed to neutralize 4.2 mL of a 5.4 M H2SO4 solution?

*December 6, 2016*

**Calculus**

So -1/2

*December 6, 2016*

**Calculus**

If f(x)=(x^2+1)^(2-3x), then f'(1) = -3/2ln(2)-1/2 Is this correct?

*December 6, 2016*

**Calculus**

If f'(x)=-f(x) and f(1)=1, then f(x) = e^1-x Is this correct?

*December 6, 2016*

**Calculus**

If u,v, and w are nonzero differentiable functions, then the derivative of uv/w is what?

*December 6, 2016*

**Calculus**

f(x)=6x^3-4x then d/dx(f(lnx)) =??

*December 5, 2016*

**Calculus**

If the line 3x-4y=0 is tangent in the first quadrant to the curve y=x^3+k, then k is? I got 1/4 is this correct?

*December 5, 2016*

**Calc**

Find the derivative. f(x)= ?x^2-4,-2arcsec(x/2)

*November 29, 2016*

**calc**

The velocity function, in feet per second, is given for a particle moving along a straight line. v(t) = t3 ? 10t2 + 27t ? 18, 1 ? t ? 7 Find the displacement Find the total distance that the particle travels over the given interval.

*November 19, 2016*

**Calc**

Water flows from a storage tank at a rate of 500 ? 3t liters per minute. Find the amount of water that flows out of the tank during the first 13 minutes.

*November 19, 2016*

**Calculus**

Integral f (x) * g (x) doesn't equal Integral f (x)dx * integral g (x)dx Why?

*November 18, 2016*

**Calculus**

I'm supposed to sketch a graph of two functions that have the same derivative of a graph. The graph having a horizontal line on (0,4)

*November 18, 2016*

**Calculus**

Is 27/4 right?

*November 16, 2016*

**Calculus**

Find the values of c guaranteed by the mean value theorem for integrals. f(x)= x^3 [0,3]

*November 16, 2016*

**Calc**

Why is it false that F'(x) = G'(x) on the interval [a,b], then F(b) -f(a) = G(b)- G(a)?

*November 16, 2016*

**math**

a semi circle of diameter 6cm is cut from a rectangle with sides 6cm and 8cm.calculate the perimeter of the shaded shape correct to 1 decimal place

*August 29, 2016*

**21st**

Dire ak maaram napakiana ngane di pota

*June 28, 2016*

**Chemistry**

@DrBob222 what do you mean by ppt?

*May 18, 2016*

**Chemistry**

I was sick all week and i just got this worksheet today

*May 18, 2016*

**Chemistry**

no???

*May 18, 2016*

**Chemistry**

The solubility product constant of Calcium hydroxide is 6.5 * 10^-6 . If 0.10 mo of sodium hydroxide is added to 1 L of 0.0001 M Ca(OH)2, what is the final concentration of the calcium ion? Show your work.

*May 18, 2016*

**college chemistry**

If the temperature of argon gas is 400 K and the average velocity of argon is twice that of radon what is the temperature of radon gas?

*May 15, 2016*

**algebra 1**

In a basketball game you score 2 points for a field goal and 1 point for a free throw. Suppose that you have scored at least 5 points a game and have a season high of 12 points a game. How many field goals and free throws could you have made in one game?

*April 12, 2016*

**chemistry**

They both have very similar hydrogen bonding, considering that each only has 1 Oxygen. As far as intermolecular forces go, Ethanol has stronger IMF's due to being a larger molecule with more electrons, which makes it more polarizable. (Greater London Dispersion Forces)

*April 3, 2016*

**science**

Mg(s) + 2HNO3(aq) ---> Mg(NO3)2(aq) + H2(g)

*April 3, 2016*

**chemistry**

Add a solution of sodium chloride to the lead nitrate to precipitate Pb(NO3)2, while the sodium nitrate remains aqueous

*April 2, 2016*

**Algebra**

y=1/3x

*April 2, 2016*

**Chemistry**

Polarity? Electronegativity?

*April 2, 2016*

**Chemistry**

You're going to have to do better than that.. lol

*April 2, 2016*

**Chemistry**

I was able to find the answer - disregard this question

*April 2, 2016*

**Chemistry**

2- Gases A2 and B2 react according to the equation: A2 + B2 → AxBy . If equimolar ( not necessarily stoichiometrically equivalent) quantities are placed in a reaction vessel with a massless, frictionless piston and allowed to react to completion. The density of the gas ...

*April 2, 2016*

**Math**

1 oz each

*April 2, 2016*

**chemistry**

O is always a -2 oxidation state, unless it is in a peroxide, so -2*4*3 is -24, Al is +3 because an ion's oxidation state is its charge, which leaves the overall charge right now at -21, so to make the overall charge 0, 3 times the Oxidation state of Cl must equal positive...

*April 1, 2016*

**algebra**

Yes, C is correct

*March 30, 2016*

**Spanish**

aquella hints at the word "that" yet I too am conflicted between b and c. I also suggest C though.

*March 29, 2016*

**science help please**

Too long, barely read, 2&3 are A tho

*March 21, 2016*

**Biology**

How do mutations that alter the nucleotide sequence of a promoter influence the original function of that promoter and thus the entire cell? (Try to name all the biological consequences of possible mutations in the promoter.)

*February 21, 2016*

**Chemistry**

I NEED HELP ASAP Here's the problem I'm struggling with: When 1.00 mole of ethlyene (C2H4) is burned at constant pressure, 1410 kJ of energy is released as heat. Calculate delta H for a process in which 10.0 g of ethlyene is burned at constant pressure. Please show me ...

*February 18, 2016*

**salag national high school**

If a ship has only 5 flags and 2 of them are alike w/ which to send signals,how many different signals can be sent if all flags are used?

*February 9, 2016*

**calculus**

Position,(distance) is the 2nd antiderivative of acceleration, so first you need to make an equation for acceleration, being 90=30+6t. From there you would have to antiderivate the equation twice, using an intial value for velocity and position to solve for the C's that ...

*February 7, 2016*

**spanish**

yo gordo is the answer

*January 26, 2016*

**ap physics**

Mass m1 on the frictionless table of the figure below is connected by a string through a hole in the table to a hanging mass m2. With what speed must m1 rotate in a circle of radius r if m2 is to remain hanging at rest? (Use any variable or symbol stated above along with the ...

*January 18, 2016*

**Chemistry**

How do you separate a mixture of iron fillings and sulphur powder by use of methylbenzene

*December 29, 2015*

**science**

The room will remain hot because the aluminum foil will trap the heat trying to get out and will also prevent the entry of cool fresh air

*December 28, 2015*

**Reading**

i couldn't find anything in the books anything...

*October 23, 2015*

**Rucker Blvd**

Math: what is the smallest number divisible by 17 and 8

*October 22, 2015*

**math**

Tamara has 4 times as many pages to read for her book report as maria. Tamara has 20 pages left to read. how many pages does maria have left to read?

*October 6, 2015*

**english**

why did marilyn lee cross aboard the EDS

*September 15, 2015*

**problem solving.**

10 yrs ago, Jane was 4 times as old as bianca. Now she is only twice as old as Bianca. Find their present age

*August 27, 2015*

**algebra**

simplify each expression 44/9x-7/4+12/7x+1 I worked it out and just went to check it thank you

*August 19, 2015*

**corporate taxation**

zb bhd, carrying on a share brokering business, was incorporated and has its head office in kuala lumpur. its representative residing in korea acted for some malaysian clients in the purchase and sale of shares in korea companies quoted on the stock exchange there. the ...

*August 17, 2015*

**math**

Find the minimum number of cells connected in two rows in parallel required to pass a current of 6A through an external resistance of 0.70 ohms. Take the emf of each cell as 2.1 volts and internal resistance of each cell as 0.5 ohm.

*June 30, 2015*

**Chemistry**

To 20 mL of .2 m nitric acid are added successive amounts of a base of unknown concentration. Neutrality is reached after the addition of 40 mL of the base. What was the OH of the original base solution? assume that it was 100% ionized.

*May 28, 2015*

**math**

43 circle

*March 4, 2015*

**Math**

The curves y=sinx and y=cosx intersects twice on the interval (0,2pi). Find the area of the region bounded by the two curves between the points of intersection.

*March 1, 2015*

**physics**

do VASTS yourself next time!

*February 27, 2015*

**[Calculus] U-substitution for Integrals**

Nevermind. Found the answer again. Thanks again.

*February 23, 2015*

**[Calculus] U-substitution for Integrals**

Integral of cos(x)*a^sin(x) + C dx = Integral of cos(x)*sin(x)^a + C dx = Let a be a fixed positive number. I'm clueless is to how to solve for a...

*February 23, 2015*

**[Calculus] U-substitution for Integrals**

Nevermind, found the answer. It is (1/3)(u^5).

*February 23, 2015*

**[Calculus] U-substitution for Integrals**

Integrate from 1 to 5 of (3x-5)^5 dx = Integrate from a to b of f(u) du where (I have solved this part) u = 3x-5 du = 3 a = 0 b = 12 The original value of the integral is 165888 via calculator here's my last question, and it has to be in terms of u: f(u) = ? (Again, in ...

*February 23, 2015*

**AP Chemistry**

#1 is its own completely separate problem if it clears up any confusion. One of my friends says the Ho, being positive is endothermic, and she says it's more theoretically based too, and I don't think it uses any value of the heat formation table at all.

*February 12, 2015*

**AP Chemistry**

Thank you for #2! For #1, the same principles would apply right? Here are my reasons for the T/F. 1.) Decreasing the temperature at 500K would be beneficial for the reaction, and therefore would shift the reaction forward which would favor PCl3. Also, the equation is ...

*February 12, 2015*

**AP Chemistry**

2 Questions (Multi-choice and T/F, though not sure if they're right, and these 2 questions have no correspondence to each other) 1.) a.) Consider the following system at equilibrium where Kc = 1.20E-2 and H° = 87.9 kJ/mol at 500 K. PCl5 (g) <=> PCl3 (g) + Cl2 (g...

*February 12, 2015*

**AP Chemistry**

Consider the following reaction: 2NOBr(g) 2NO(g) + Br2(g) If 0.332 moles of NOBr, 0.377 moles of NO, and 0.375 moles of Br2 are at equilibrium in a 14.6 L container at 429 K, the value of the equilibrium constant, Kp, is ___. [NOBr] = .332mol/14.6 L = .0227 M [NO] = .377mol/14...

*February 12, 2015*

**Grade 12 Physics**

A rocket ship is moving away from the earth after having been fired from a launch pad in Florida. At what point above the earth's surface will the force of gravity be reduced to ½ of its original value? ------------------ Prior to this question I was given the ...

*January 13, 2015*

**P.E**

here, i know these are right 1:d 2:a 3:b 4:d 5:d 6:b 7:a 8:c 9:a 10:d i just did a test with these and i got them right

*December 16, 2014*

**Calculus I**

Semelparous organisms breed only once during their lifetime. Examples of this type of reproduction strategy can be found with Pacific salmon and bamboo. The per capita rate of increase, r, can be thought of as a measure of reproductive fitness. The greater r, the more ...

*November 2, 2014*

**Science! Help!!**

Im 14 and also from connections lol and its not C its B

*September 25, 2014*

**Math**

A retail outlet purchased 300 printers at a list price of $100 less 7%, and 6%. The rate of markup on selling price on the printers was 40%. After selling 40% of the shipment, the rest of the printers were marked down to a reduced selling price. When there were only 40 ...

*July 16, 2014*

**Physics I for College**

thank you

*June 23, 2014*

**Physics I for College**

a rope that makes an angle of 30 degrees with the horizontal drags a crate along the floor. what must be the tension in the rope if a horizontal force of 40N is needed to drag the crate? please help me. i really didn't understand what my professor told me. he speak so fast...

*June 23, 2014*

**health**

hat is another name for bipolar disorder?

*June 17, 2014*

**Biology**

Hydrolysis uses a catabolic reaction. Explain what a catabolic reaction is and how it is useful in creating monomers from polymers.

*May 12, 2014*

**Reading**

What else can I add? I don't want to add too many "questions"

*February 23, 2014*

**Reading**

Okay, also for this passage "True, the genocide bloodlettings and other mass slaughters of the half century after Hitler- in Cambodia, in Biafra, in Bosnia, in Rwanda and elsewhere-did not approach the Holocaust in scale" I have down affected me a lot because knowing...

*February 23, 2014*

**Reading**

How does this passage affect you? “Lief was shown a pocketbook and lamp-shades made from human skin for Ilse Kich, wife of the commandant" So far I have: This left me in shock that someone would have the idea to skin off someone’s skin and make it into a gift ...

*February 23, 2014*

**Math**

83.95

*February 6, 2014*

**physics**

An ocean liner is traveling at 5m/s. A passenger on deck walks towards the rear of the ship at a rate of 4m/s. After walking 30 meters, he turns right and walks at a rate of 4m/s to the rail, which is 12 meters from his turning point. What is his velocity relative to the water...

*November 13, 2013*

**chemistry**

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

*October 8, 2013*

**chemistry**

Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

*October 8, 2013*

**chattco**

Dave's age in 4 years is 18. Write an equation that represents Dave's age in 4 years. Use the variable, d, to represent Dave's age

*June 5, 2013*

**Math**

A 3 in. by 5 in. photo is enlarged five times what is the dimensions of the larger photo

*May 9, 2013*

**Algebra 2**

Someone crapped in Howard's cornflakes

*May 3, 2013*

**Maths :(**

41 different balls are drawn from a bag containing balls numbered 1,2,…,300. The probability that the number of odd balls drawn is larger than the number of even balls can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?

*April 15, 2013*

**geometry**

ABCD is a quadrilateral with ∠ADC=∠ACD, ∠ACB=∠ABC and CD=7. If triangles ADC and ABC have perimeter 51 and 59, respectively, what is the value of BC?

*April 15, 2013*

**Maths**

A bag contains 10 red marbles, 10 green marbles, 10 yellow marbles and 10 blue marbles. You reach into the bag and grab a marble, then reach into the bag and grab a second marble. The probability that the second marble is the same color as the first marble is ab, where a and b...

*April 15, 2013*

**Maths**

How many integer values x satisfy the inequality 2<3x−1/6<5?

*April 15, 2013*

**MAths**

Consider a digital clock. The first time after midnight when the three digits are all prime numbers is 2:22 am. What is the last time before 10:00 am, when the three digits on the clock are all prime numbers? Details and assumptions If you determine that the time is 4:23 am, ...

*April 15, 2013*

**Maths**

Find the number of positive integers <1000 that can be expressed as 2^k−2^m, where k and m are non-negative integers.

*April 12, 2013*

**Maths**

wasnt 5 :(

*April 12, 2013*

**Maths**

Two players each flip a fair coin. The probability that they get the same result can be expressed as ab where a and b are coprime positive integers. What is the value of a+b? Dont get the a+b :(

*April 12, 2013*

**Maths**

Let N=1!⋅2!⋅3!⋅4!…9!⋅10!. Let 2^k be the largest power of 2 that divides N. What is the value of k?

*April 12, 2013*

**Physics :(( help please TT**

You are a maker of hot air balloons and wish to construct a balloon that will lift you and a friend to places unknown. Your standard balloon design is a perfectly spherical, nylon fabric balloon with a small hole on the bottom for the burner that heats the air. Nylon starts to...

*April 12, 2013*

**Physics**

Consider a regular pyramid charged with constant volume charge density. The potential at point P, the top of the pyramid is 1V. What would be the potential at point P if we removed the top part, so the pyramid is instead truncated at a height h=0.6H? Hint: You don't need ...

*April 12, 2013*

**Maths**

In triangle ABC, D is the midpoint of AC and E is the midpoint of AB. BD and CE are perpendicular to each other and intersect at the point G. If AB=7 and AC=9, what is the value of BC^2?

*April 12, 2013*

**Maths**

Triangle ABC has lengths AB=14, AC=18 and also a given angle of ∠BAC=30∘. What is the area of triangle ABC?

*April 12, 2013*