Monday
May 25, 2015

Posts by anon


Total # Posts: 1,639

AP CALC
find an equation of the tangent line to the graph of x^4-2y^2=1 at the point (2,4)
December 17, 2013

AP CALC
Suppose that g(x)=h(x)/f(x) and f(3)=5, h(3)=6, g'(3)=4 and f'(3)=1. find h'(3).
December 17, 2013

Math
Alan, Gil, and Deb's point score in a video game was in a ratio of 2:3:4. Deb scored 114,400 points. A) how many points did Gil score? B) how many points did all of them score? i dont know how to do this would you please help me, thank you
December 17, 2013

electricity and magnets
A thick metal slab carries a current I. A uniform magnetic field B points perpendicular to the slab (and into the page). If point P on the slab is at a higher potential than point , what can we say about the charge carriers that produce the current in the slab?
December 17, 2013

Physics
Two thin, infinitely long, parallel wires are lying on the ground a distance d=3cm apart. They carry a currentTwo thin, infinitely long, parallel wires are lying on the ground a distance d=3cm apart. They carry a currentTwo thin, infinitely long, parallel wires are lying on ...
December 12, 2013

please help me!! with this science!!!!!
Smeh, don't blame her. Do your work next time.
December 11, 2013

physicS IMP PLS
@Greco I tried it and it workrd for a and c and for Fy but Fx was wrong!why did you use alpha? please help with this question!
December 9, 2013

physics I'M STUCK PZL HELP
is the "u" the ejected fuel in m/s instead of km/s?
December 8, 2013

physics I'M STUCK PZL HELP
in the equation above what is the "ln"?
December 8, 2013

PHYSICS IMP PLS
@Hil if you had calculated correctly it seem to be right
December 8, 2013

PHYSICS IMP PLS
it's simple 10%/2 because 145=290/2 and it said "assume the burn rate is constant" so V=Vex*ln(1/(1-%/2)) for your case V=2000*ln(1/(1-0.05)) a=V/145
December 8, 2013

Science- Ms. Sue
@Ms.Sue
December 6, 2013

Writing Skills
Thank you so much ^_^
December 4, 2013

Writing Skills
i think 1 is 2 2 is 2 3 is 2 are they correct?
December 4, 2013

Writing Skills
1) Frequently their renovation need to be completely redone. 1 need 2 needed 3 were needing 4 will have been needing 5 needs 2)If we were teenagers at the time these licenses signified our passage to adulthood. 1 time these licenses 2 time, these licenses 3 time; these ...
December 4, 2013

Science
How far does a wave travel in three cycles?
December 3, 2013

Science
The distance from the crest of a wave to the next crest is 10 centimeters. The distance from a crest of this wave to a trough is 4 centimeters. a. What is the amplitude of this wave? b. What is the wavelength of this wave?
December 3, 2013

World History
How do the beliefs of being a Christian and being a Crusader contradict each other? How are the ideas of the Crusades used today for both Christians and Muslims?
December 1, 2013

Solar
Someone please help me. I keep getting the same wrong answer (38.4). Please help ASAP. Thanks.
November 29, 2013

Solar
All, anything on this yet? please help!!! Thanks in advance again./Anon1...didn't know there was an Anon already
November 29, 2013

Solar
Greeting All, please assist with the below. Thanks. The spectral power density of a solar simulator is given by: P(λ)=7.5∗1015λ−2.25∗109 [Wm^-2m^-1] for 300nm<λ<500nm P(λ)=2.25∗109−1.5∗1015λ [Wm^-2m^-1] for ...
November 29, 2013

History
Who were the Seljuk Turks? What did they do?
November 25, 2013

ET3034TUx Solar Energy
Consider a crystalline PV module with the following output parameters mentioned at STC (Standard Testing Condition) conditions by the manufacturer. Pmax = 250W Voc = 50V Isc = 6A NOCT = 40°C Temperature coefficient of power = -1W/°C a) If the ambient temperature falls ...
November 25, 2013

Chemistry
Please help! Is 4-methylphenol acid, basic or neutral?
November 25, 2013

Language Arts
Have you ever wanted to know what people said and thought about you when you weren't around? If you could disguise yourself in some way and be around the people you know, how would you carry it out? Describe your ideal disguise and a scenario that you imagine would take ...
November 24, 2013

Language Arts
Thank you! That's just what I needed tips! :-)
November 24, 2013

Language Arts
describe a soggy, wet day. use sensory details.
November 24, 2013

Physics
can you help me with the problem of TURNTABLE SOLUTIONS???
November 24, 2013

Physics
thanks Elena you're the best ;)
November 24, 2013

Physics
TORQUE, ROTATION AND TRANSLATION A Yo-Yo of mass m has an axle of radius b and a spool of radius R . Its moment of inertia about the center can be taken to be I=(1/2)mR2 and the thickness of the string can be neglected. The Yo-Yo is released from rest. You will need to assume ...
November 24, 2013

Physics
it didn't work :(
November 24, 2013

Physics
TURNTABLE SOLUTIONS A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 400 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the ...
November 24, 2013

water treatment
A wastewater treatment plant based on activated sludge with biological phosphate and nitrogen removal via pre-denitrification. The influent flow (dwf) is 30,000 m3/day and the influent BOD concentration is 300 mg BOD/l. The suspended solid concentration in the influent is 150 ...
November 24, 2013

water treatment
A wastewater treatment plant based on activated sludge with biological phosphate and nitrogen removal via pre-denitrification. The influent flow (dwf) is 30,000 m3/day and the influent BOD concentration is 300 mg BOD/l. The suspended solid concentration in the influent is 150 ...
November 24, 2013

water treatment
Which is correct for this trickling filter? a)Due to the low BOD loading rate the biomass growth will be too little. Methanol needs to be dosed to keep the biomass alive. b)Due to the high BOD loading rate the filter might clog. This can be prevented by effluent recycling in ...
November 24, 2013

Calc
At noon, ship A is 100km west of ship B. Ship A is sailing south at 30km/h and ship B is sailing north at 15km/h. How fast is the distance between the ships changing at 4:00pm?
November 23, 2013

Chemistry
PLEASE HELP! I was just wondering why it is important to add an NaOH pellet to a nucleophile containing solution with ethanol before adding an electrophile.
November 20, 2013

waste water treatment
3G man?
November 20, 2013

waste water treatment
screen -->coarse material grit chamber -->xxx primary sedimentation -->xxx anaerobic tank-->xxxx anoxic tank--->xxxx aerobic tank-->nitrification final clarifier-->xxxx sludge dewatering -->remove water from the sludge help me with Q3C Q3D Q3E
November 20, 2013

Science please
Kinetic energy and Potential energy are often considered to be forms of mechanical energy. List three other forms of energy and state a source for each.
November 19, 2013

Chemistry
(a) Which of the following are requirements for anionic polymerization? --A double bond --End groups which can react by releasing a small molecule --A strong base to initiate the reaction --A strong acid to initiate the reaction --An electron-withdrawing group near the double ...
November 19, 2013

Chemistry
finally i got it F Cl COOCH3
November 19, 2013

Chemistry
COOCH3 and CH2CH3 is wrong
November 19, 2013

Chemistry
COOCH3 is wrong
November 19, 2013

Math
i dont understand that problem the one that is up there i need the answer like now though
November 15, 2013

Chemistry
Did you find the last quetion of homework 11?
November 15, 2013

Chemistry
thanks
November 15, 2013

Chemistry
@Drew can you give me the formula?
November 15, 2013

Chemistry
1- 7.36e-2 189 2-metal Solid hydrogen has a half filled s-band insulator Solid helium has a filled s-band 3-1.13 semiconductor 4-Ionization of phosphorus requires some minimum temperature n_type The concentration of conduction electrons is fixed by the concetration of ...
November 15, 2013

Chemistry
if someone help with those questions I'll post all the rest of answers
November 15, 2013

Chemistry
3//1.13 ev semiconductor 4//4th option n-type 4th option intrinsic
November 15, 2013

Chemistry
a)The Young's modulus for a material is 5.0*10^10 N/m2. The material is stretched to a strain of 4.0*10^-3. How much elastic energy will be expended? (Express your answer in J/m3) Knowing that the energy associated with the formation of 1 mole of vacancies in copper (Cu) ...
November 15, 2013

Solar Energy
it is wrong! I'm sure!
November 14, 2013

Biology
Please help! i was wondering why a genome size determined in a lab would be smaller than that of the actual. thanks
November 12, 2013

Biochemistry
Please help! i was wondering why a genome size determined in a lab would be smaller than that of the actual. thanks
November 12, 2013

Physics please HELP
1- 19.2E-19 2-??? 3-1 4-4.8E-5 5-3.84e-23 6-h-(2*ke*lambda*q)/(l*ks) 7-(E*q)/(m*g) 8-D 9-7e-6 10-3.6e7 11-??? 12-3rd option 13-54e9 14-408.5E-12 15-4.902E-9 16-2.451E-9 17-6000 18-96E-17 19-1053787047200878.1558726673984632 20-increase 21-stay the same 22-increase 23-increase ...
November 8, 2013

Science
1. The sporophyte generation produces spores that grow into a(n) (1 point) gametophyte. gymnosperm. angiosperm. pupa. 2. Placental mammals develop (1 point) in an egg laid in water. in a pouch on the mother’s body. inside the mother’s body. inside an amniotic egg. 3...
November 6, 2013

Chemistry
How would I extract benzophenone from acetylsalicylic acid? thanks
November 6, 2013

Chemistry
If I have 1.00 mM NaCl and 4.32 mM NaCl, how do I calculate the ionic strengths of each? Thanks
November 4, 2013

PHYSICS(HELP)
For v_1, you have sqrt(v_0^2 - 2*G*(L(1 - cos(alpha)))), right? For tension, you use T = Fgravitational + Fcentrifugal, where Fg = m*g*cos(alpha) and Fc = m*(v_1)^2/L. Then for max height you'll have something like this: (v_1 * sin(alpha))^2/(2*G), and for alpha you use ...
November 1, 2013

PHYSICS(HELP)
Well, think a little... If you're at an infinity distance, your gravitational potential must be zero, as you see: -mMG/distance, if distance is infinity, it doesn't metter -mMG as somehow it is some constant. So, you have some velocity at "infinity" so you ...
November 1, 2013

english
As a kpop fan, People become so fascinated with the style of kpop that they just want to keep on comprehending what it is. It maybe the dance, the singing, the power even more! These kpop stars bring so much talent on the stages every time they perform. That's why they are...
October 30, 2013

ET3034TUx Solar Energy
Thank you! but it's not only a) !!
October 29, 2013

ET3034TUx Solar Energy
Which of the following processes is used in order to fabricate mono-crystalline silicon? a) The Czochralski process b) Silicon ribbon process c) The float-zone process d) The silicon casting process
October 29, 2013

Chemistry
How do I determine which atom in a molecule would be the strongest base? Thanks
October 28, 2013

Solar Energy Please Help
@foxman thinks
October 26, 2013

Mathhh
Use substitution to solve the system of equations given below. 8x - 4y = 16 2x - y = 4
October 25, 2013

science
i think
October 25, 2013

science
destin y is rong
October 25, 2013

science
desiny isn't right
October 25, 2013

Chemistry
Help! If I have 0.0031 absorbance/sec, how would I convert this to absorbance/minute? Thanks
October 22, 2013

calculus
I really need help on this!!!!
October 21, 2013

calculus
Let y =x arcsin x, x is an element of ]-1, 1[. Show that d^2y/dx^2 = 2-x^2/(1-x^2)^3/2
October 21, 2013

Math- Urgent
2e = 4e -16 -4e -4e -2e=-16 /-2 /-2 e=8
October 21, 2013

math
x+4=-8 do you have to solve for x?
October 21, 2013

math
I completely forgot the rules but.... if you have ((1-x)^1/2)^2 Then would you multiply the exponents to get 2/2 = 1 or add them to get 3/2
October 21, 2013

algebra
2 cm. i think
October 21, 2013

Math please help
You have to set up a proportion. 2/3 = 12/x solve for x 2x=36 x=18
October 21, 2013

algebra
3. I think Because you take the total number of problems (48) and divide that by 2 = 24. Then divide that by 2 = 12. And divide that by 2= 6. And divide that by 2 = 3. He needs to complete 3 problems on the first day for the number of problems completed to double each day for ...
October 21, 2013

math
please help me. I don't know what I am doing wrong
October 21, 2013

math
I tried to use the quotient rule but I get stuck simplifying it. I got (sqrt1-x^2)(1/sqrt1-x^2) - (x+arcsinx)(1/2(1-x^2)2x) / (sqrt1-x^2)^2
October 21, 2013

math
*use the quotient rule
October 21, 2013

math
I get stuck on the second derivative, trying to get it to equal 2-x^2/(1-x^2)^3/2. I think that from my first derivative, you have to sure the quotient rule
October 21, 2013

math
xarcsinx*
October 21, 2013

math
Sorry i meant x arrsin x. So I thought the first derivative of that would be x/sqrt1-x^2 + arcsinx
October 21, 2013

math
Let y = arcsin x, x is an element of ]-1, 1[. Show that d^2y/dx^2 = 2-x^2/(1-x^2)^3/2
October 21, 2013

math
ok thank you.
October 21, 2013

math
do you just change all the signs of the terms? if so, why is this necessary?
October 21, 2013

math
Thanks. I was wondering, why is it "+ sin x" in the second step?
October 21, 2013

math
cos2x-sinx=0. Factor and solve for sinx
October 21, 2013

Science help! URGENT. Check answers
If anybody is still looking for the answers to this quiz, I got a 100 with these answers: 1. False 2. C 3. D 4. B 5. D 6. A 7. B 8. A On number 9, give an example in change of velocity. The change of velocity is known as acceleration, and it is the rate at which velocity ...
October 21, 2013

physics
Part b) is working forces. So you have centripetal acceleration = N-kx where kx is the spring force. cent acc = mv^2/r so us a)to derive this.
October 19, 2013

physics
Use this link it shows the question you are solving , but it has slightly different parameters ie the equilibrium of the spring. It show that you need GPE + EPE = KE + GPE + EPE ie TOP=SIDE. You can then rearrange this to get everything on one side except v (your speed). I ...
October 19, 2013

physics
Use this link it shows the question you are solving , but it has slightly different parameters ie the equilibrium of the spring. It show that you need GPE + EPE = KE + GPE + EPE ie TOP=SIDE. You can then rearrange this to get everything on one side except v (your speed).
October 19, 2013

Can someone check these answer for me?
The correct answers are 1. B 2. A 3. C 4. D 5. C I just took this and got 100%
October 17, 2013

Solar Energy Help ASAP
0.674 can someone help with the others quetion? Q4 5 6 7?
October 17, 2013

ET3034TUx Solar Energy
The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and T the ...
October 16, 2013

ET3034TUx Solar Energy
The width of the space charge region at a p-n junction is reduced by applying a voltage bias over the p-n junction. What is the correct statement on both the bias voltage and the p-n junction? a)The voltage is a forward bias and the diffusion of the majority charge carriers ...
October 16, 2013

Science help! URGENT. Check answers
'somemone' is wrong because acceleration is the rate at which velocity changes, and the change can be speed, direction, or both and the eagle is constantly changing direction. The answers the asker chose are correct.
October 15, 2013

Physics
oscillating block ans D) 1.2
October 15, 2013

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