Thursday

July 24, 2014

July 24, 2014

Number of results: 411

**micro economics**

Define and then derive the expression for the MRTS. How do you derive this? I thought derive meant to receive or take something. Thanks.
*June 23, 2009 by anonymous*

**university physics**

Derive absolute error in equations: 1)Derive absolute error in (e/m) e/m= 2V/B^2*R^2 2)Derive absolute error in B B=8uN(Inet)/square root 125a
*November 21, 2012 by Ella*

**chemistry**

To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
*April 16, 2013 by Jamie*

**chemistry**

To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
*April 16, 2013 by Jamie*

**chemistry**

To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
*April 16, 2013 by Jamie*

**Micro econ**

1: Suppose John had a utility function of U=X^2/3Y^1/3 . Derive Johns demand function from his utility function showing all the necessary steps. i know that the MUx=MUy and first i derive the equation to 2/3X^-1/3 1/3Y^-2/3 then im stuck i need help with the simplification
*September 18, 2007 by Brett*

**chemistry**

Derive the empirical formula of a hydrocarbon that on analysis gave the following percentage by mass composition: C = 85.63 % and H = 14.37 %. If the molecular mass of this compound is 56 g, derive the molecular formula.
*May 30, 2013 by Hanin*

**AP Physics**

I'm trying to derive the formula v^2 = v0^2 + 2a(x-x0) were zeros are subscripts my book tells me to derive it this way use the definition of average velocity to derive a formula for x use the formula for average velocity when constant acceleration is assumed to derive a ...
*June 18, 2009 by AP Physics*

**trigonometry**

Derive the identity cot A+1= csc A to derive this identity does it mean to change the cot^2 A + 1 into csc^2 A ??
*January 30, 2011 by Anonymous*

**Physics, error derivation**

I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've never had to derive anything like this ...
*March 8, 2011 by trace*

**physics, error calculation repost**

I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've never had to derive anything like this ...
*March 8, 2011 by Trace*

**Physics PLEASE**

I'm trying to derive the formula v^2 = v0^2 + 2a(x-x0) were zeros are subscripts my book tells me to derive it this way use the definition of average velocity to derive a formula for x use the formula for average velocity when constant acceleration is assumed to derive a ...
*June 19, 2009 by Physics PLEASE*

**Economics**

Ive been stuck on this forever now if someone could please walk me through it i was appreciate it: 1: Suppose John had a utility function of U=X^2/3Y^1/3 . Derive Johns demand function from his utility function showing all the necessary steps. i know that the MUx=MUy and first...
*September 18, 2007 by Brett*

**physics**

A ball is thrown vertically upwards, from ground level, with an initial speed vo. Assume that air resistance is negligible so that the acceleration of the ball is due solely to gravity. a) Derive an algebraic formula for the time t that it takes for the ball to reach its ...
*September 1, 2010 by Ashleyy*

**Chemistry**

The determination of 4.000 mmol of ZnCl2 is performed gravimetrically by the addition of NaCN solution in a Total volume of 200.00ml. Ksp = 3.0X10^-16 for Zn(CN)2. State and verify all assumption. Assume cyanide does not hydrolyze. a. Derive the COC and COM equations for the ...
*December 22, 2012 by WILL*

**chemistry**

The kinetic theory of gases is based on a number postulates from which the equation P= 1/3 N/Vm is derived (P is the pressure of the gas, N the number of molecules in the container, m the mass of each molecule and is the mean square speed). State all the postulates and...
*January 1, 2014 by Taylor*

**Property of logarithms**

Using property of logarithms, how do I prove derivative of ln(kx) is 1/x First observe that ln(kx) = ln(k) + ln(x) then take derivatives. The ln(k) is simply a constant so it goes away. You could also derive it as d/dx ln(kx) = 1/kx * k by the chain rule. To see that the ...
*October 20, 2006 by Jen*

**Physics question - Damon please help!!**

I am doing the monkey and hunter question, and I need to find out what the minimum speed the bullet has to be.. The variables I have are g, Vo, theta, Dx(horizontal distance from monkey), and Dy (vertical distance from monkey). I need to derive Vo in the form of (Dx/cos0)(sqrt...
*November 11, 2013 by Jennifer*

**economics**

Suppose that the following equations describe an economy (C, I, G, T, and Y are measured in billions of dollars and r is measured in percent; for example, r = 10 C=170+0.6(Y-T),T=200,I=100-4r,G=350 (M/P)d=L=0.75Y-6r, (M/P)s=735 a. Derive the equation for the IS curve (Hint: ...
*August 16, 2010 by yaw*

**economics**

(2 points) Suppose that the following equations describe an economy (C, I, G, T, and Y are measured in billions of dollars and r is measured in percent; for example, r = 10 means r = 10%) 1700.6 200 1004 350...
*August 16, 2010 by kojo*

**Calculus**

Posted by Aletha on Sunday, March 18, 2007 at 6:51pm. After t hours of an 8-hour trip the distance a car travels is modeled by: D(t)= 10t + (5)/(1+t) - 5 where D(t) is measured in meters. a) derive a formula for the velocity of the car. b) how fast is the car moving at 6 hours...
*March 18, 2007 by Aletha*

**Physics**

how do you derive deltaG
*May 28, 2013 by Anonymous*

**MATH !!**

Given that f:x -->3-x g:x --> x+2/x-5 derive the expression for gf(x)
*September 7, 2011 by Nelly*

**MATH**

Given that f:x -->3-x g:x --> x+2/x-5 derive the expression for gf(x)
*September 7, 2011 by Nelly*

**Calculus**

Derive: F(x)= sqrt(3, 1 + tan(x))
*May 1, 2013 by Mason*

**Economics Help pls**

Suppose you are given the following production function: , where y is output and K is capital. y= 60K + 20.3K2- K3 1.1 what is a production function, what is the real work application of such, and where would you source the data to develop a production of the type given above...
*July 16, 2010 by Sarah*

**macroeconomics**

Households derive income from ______.
*July 19, 2009 by steven Sanchez*

**Trigonometry**

Derive the identity cot A+1= csc A
*January 30, 2011 by Anonymous*

**p**

Derive Gauss law in integral form.
*February 10, 2013 by mania*

**immunology**

do monocytes derive from killer T cells?
*May 6, 2013 by Jess*

**economics**

how to derive marginal utility of income?
*April 2, 2014 by geet*

**Calculus**

After t hours of an 8-hour trip the distance a car travels is modeled by: D(t)= 10t + (5)/(1+t) - 5 where D(t) is measured in meters. a) derive a formula for the velocity of the car. b) how fast is the car moving at 6 hours? c) derive a formula for the car's acceleration. I'm ...
*March 18, 2007 by Aletha*

**Calculus**

Can someone please tell me how to derive V=4/3pi(r)^3 to get x^2+y^2=r^2?
*March 23, 2008 by Jess*

**English**

What are the ways of how to derive words into noun?
*November 9, 2011 by laniie*

**Calculus HELP!**

Use the fact that L{f'}=sF-f(0) to derive the formula for L{cosh at}
*July 27, 2013 by Sara*

**Econometrics**

Consider the linear model yi = xiB + e = B1 + B2xi2 + ... + Bkxik + ei, i = 1, ..., n, or in matrix notation Y =XB + e. Consider the linear model X = Z pie + u where Z is a matrix n * m, X is a matrix n * k and pie is a matrix m * k. Assume that 1. E (x'ixi) has full column ...
*August 31, 2013 by Joy*

**science**

derive all equation of motion mathametically & graphically.
*June 25, 2008 by sangam*

**physics**

How do we derive these laws: (most of the time, the numbers are subscript) v'2 = v1 * ( (2 * m) / (m1 + m2) ) + v2 * ( (m2-m1) / (m1+m2) ) & v'1 = v1 * ( (m1-m2) / (m1+m2) ) + v2 * ( (2 * m2) / (m1 + m2) )
*April 6, 2008 by Anonymous*

**Maths**

hoe can i derive this equation. s(v)=(4pi)^1/3(3v)^2/3 and please explain.
*September 20, 2010 by Joe*

**Physics & Calc**

Derive the stationary target equations: v1 = [(m1-m2)/(m1+m2)]v1 v2 = [(2m1)/(m1 + m2)] v1
*November 11, 2010 by Megan*

**British Lit**

What are the 3 languages that derive from the original Celtic language?
*October 4, 2012 by Monica*

**physics**

derive the formula v0=sqrt((deltaX)squared)*g)/2*deltaY
*October 11, 2012 by carlton *

**Physics**

How would you derive the formula {-Ff+Fgx=ma} to show that s=tan
*March 19, 2013 by po*

**University, Physics**

Derive the error in equation: T1/2 = 1n(2)/lambda solve for T
*March 25, 2013 by Kenna*

**economic**

Define and then derive the expression for the marginal rate of technical substitution
*April 6, 2009 by Anonymous*

**physics**

Please show me how to derive the relativist mass formula: m = m0 / sqrt(1 - v^2/c^2)?
*October 22, 2009 by Marinho*

**heat transfer**

Derive 3D general conduction equation for homogeneous material
*July 24, 2013 by jigs*

**math**

How do I derive the secant reduction formula? Am I asking this question wrong? Integrate: (sec x)^n dx
*November 8, 2007 by mathstudent*

**Derivation of Physics Equation**

How do we derive these laws: (most of the time, the numbers are subscript) v'2 = v1 * ( (2 * m) / (m1 + m2) ) + v2 * ( (m2-m1) / (m1+m2) ) & v'1 = v1 * ( (m1-m2) / (m1+m2) ) + v2 * ( (2 * m2) / (m1 + m2) )
*April 5, 2008 by Anonymous*

**AP Calculus**

find f'(2) given g(2)=3, h(2)=-1, h'(2)=4, and g'(2)=-2 f(x)=g(x)h(x) I'm just not understanding how to start this at all and what it wants me to derive when I don't know the function
*October 5, 2009 by Bri*

**physcis**

use the principle of an incline plane and derive the coeffecient of stationary friction
*June 28, 2011 by merry light*

**heat transfer**

what is utility of extended surface? derive governing differential equation for fins
*July 24, 2013 by jigs*

**Economics**

There are 10 identical consumers whose demand is D: p = 20 - 10q. There are 10 identical firms, each firm's marginal cost is MC(q)= 5 + 5q. The market is competitive. a) derive the market demand function b) derive the market supply function c) what is the market equilibrium ...
*February 4, 2013 by Andrea*

**science**

Derive the expression for the difference in the free energy between a metal in its normal and superconductivity states
*July 31, 2008 by vijaya*

**physics**

derive expression to show that how drag force is dependent on velocity of moving object in fluid
*February 17, 2012 by momi*

**math**

derive the equation of the parabolla with its vertex on the line 7x+3y-4=0 and containing ponts (3,-5) and (3/2,1) the axis being horizontal.
*May 1, 2012 by intan*

**Economics**

Call Us demand function is Q=410-P and MC=10+5Q. Given that TFC=$0 a)derive an equation for TC b)calculate the profit maximizing level
*November 14, 2009 by Special*

**chem 101**

using the unit conversion method derive an equation to calculate heat produced from the HCl-Na OH reaction
*October 26, 2010 by andrew*

**Managerial Economics**

I have an exam in two days. I need an explanation to this question please. MC = 10+5Q derive an equation for total cost
*December 8, 2009 by Special*

**Calculus**

After t hours of an 8-hour trip the distance a car travels is modeled by: D(t)= 10t + (5)/(1+t) - 5 where D(t) is measured in meters. a) derive a formula for the velocity of the car. b) how fast is the car moving at 6 hours? c) derive a formula for the car's acceleration. My ...
*March 18, 2007 by Aletha*

**Chem 101**

Using the "Unit conversion method", derive an equation to calculate the heat required to raise the calorimeter to the maximum temperature.
*October 26, 2011 by John*

**Chemistry**

By using the Clausius-Clapeyron equation,lnP=Hvap/RT +C , derive the relationship between the vapor pressures,P1 and P2, and the absolute temperatures at which they were measured,T1 and T2 .
*January 25, 2012 by Jeremy*

**CALC**

I am sorry i still dont know how to start. and i am sorry for the problem earlier..it wasnt my fault :( Note that the way students like you are asked to solve this and similar problems is usually not the way people like me solve such problems. It is a good exercise to plug in ...
*May 6, 2007 by URGENT PLZ*

**trigonometry**

Can you please show me the steps: Derive the identity for sin 3x in terms of sin x.
*February 24, 2011 by anon*

**SCIENCE**

how do we derive the formula at=vf-vi if we will find acceleration? please have it step by step. Thank you
*January 15, 2013 by RANDY*

**geometry**

Derive the distance formula (d) shown below for points A = (x1, y1, z1) and D = (x2, y2, z2). 2 2 1 2 2 1 2 d = (x2 − x1) + (y − y ) + (z
*April 1, 2013 by denise*

**trig**

Derive the identity 1 + cot ^2 theta = csc^2 theta by dividing x^2 + y^2 = r^2 by y^2
*September 1, 2011 by Anonymous*

**Math**

How would you derive n(E)= E^2/((e^E/T) - 1) a) Evaluate dn/dE at fixed T. Leave answer in symbolic forms of E and T. b) dn/dT at fixed E.
*October 21, 2012 by Avery*

**Physics (Please Help)**

Problem 4.4- Suppose n o and n e are given. In (a) you only need to find the magnitude of the group velocity. Problem #2 in HW 10 may be helpful. You can also directly use the definition of group velocity, i.e., v g = triangle k w (k), taking into account the equation of the ...
*November 13, 2013 by Joy*

**Chemistry**

I believe the question asked to me in class was something like how do you derive the van't hoff factor to find that ln(K2/K1) = -(delta)H/R[(1/T2)-(1/T1)] nevermind i found the solution. thanks anyways
*December 12, 2006 by JYD*

**science**

derive the expression for time of flight maximum height & range when a body is projected at an angle thita frommthe vertical position with a proper diagram.
*June 28, 2012 by tanushree*

**Physics (please help!!!!)**

Derive the rocket equation M(dV/dt) = -u(dM/dt)for a rocket in the (constant) gravitational field near the surface of the Earth.
*March 7, 2011 by Eduardo*

**Partial Differential Equations**

Problem 4.4- Suppose n o and n e are given. In (a) you only need to find the magnitude of the group velocity. Problem #2 in HW 10 may be helpful. You can also directly use the definition of group velocity, i.e., v g = triangle k w (k), taking into account the equation of the ...
*November 12, 2013 by Joy*

**calculus**

d=dmax (1-e^(-kt)) This equation is the result of integrating an ordinary differential equation. Derive that ODE and the associated initial condition.
*March 7, 2009 by dolphin1384*

**Numerical Methods**

Derive the following formulas using Taylor series and then establish the error terms for each. f'(x) approx= (1/2*h)[4f(x+h)-3f(x)-f(x+2h)] f'(x) approx= (1/4*h)[f(x+2h)-f(x-2h)]
*February 26, 2012 by Dan*

**calculus**

if f(x)= the integral of lntdt from sqrt(x) to 2, what is f'(x)? Do you solve the integral first then derive it? And if so, wouldn't that just give you the function? Please help
*December 18, 2013 by Anonymous*

**chemistry**

What is the oxidation number of carbon, and how do you derive this number?
*August 28, 2008 by hunter*

**maths-ecllipse**

Derive the equation of the ecllipse with center (h,k)
*March 5, 2013 by anoynomous*

**algebra**

Q-80= -10P Q-10P = 0 Derive the slop of both?
*October 5, 2013 by dino*

**economics**

HELP!!!!! One and only Inc is a monopolist. The demand function for its product is estimated to be Q=60-0.4P +6Y+2A Y=3,000 P=Price per Unit Y=Per capita disposable personal income (thousands of dollars) A=hundreds of dollars of advertising expenses The Firms average variable ...
*August 25, 2010 by Christina*

**calculus**

How do I derive the integration reduction formula for tangent? Integral of (tan x)^n dx = ... I can do the derivations for sin/cosine, but I'm getting stuck on tan. Thanks!
*November 5, 2007 by mathstudent*

**math**

A farmer has 60m of fencing to make a rectangular pen for his goats. Derive an expression in simplest form, for the length of the pen
*September 13, 2011 by Anonymous*

**Heat Transfer**

Derive the general heat conduction equation in cylindrical coordinates by applying the first law to the volume element.
*February 26, 2012 by Farant*

**Economics **

Derive the profit level at this profit maximizing levels of p and q (p = 55) and q = 50. Where the demand curve for a monopoly is p=105-q. Its cost function is C= 100+5q?
*November 26, 2012 by Anthony *

**AP PHYSICS MECH. **

Need help urgent!!! A system consist of a ball of M2 and a uniform rod of M1 and length d. The rod is attached to a horizontal frictionless rotates at an angular speed w, as shown in the figure. The rotational inertia of the rod about point P is ? M1 d^2. The rod strikes the ...
*March 24, 2011 by vm*

**Managerial Economics**

5. Call Us demand function is Q = 20 0.2P and the MC = 10 + 5Q. Given that TFC = $2,000; a) Derive an equation for the TC. b) Calculate the profit at the profit maximizing level.
*November 9, 2010 by Hydie*

**physics**

an object is thrown upward with an initial velocity 'u' m/s. derive an expression for the height 'h' at which its kinetic energy becomes equal to its potential energy.
*May 5, 2013 by Annointed Jesu*

**Physics**

Derive an expression for the gain Vout/Vin. Express your answer in the form of A+jB. A basic non inverting operational amplifier with a capacitor connected in series with the resistor at the bottom.
*March 13, 2011 by John*

**Calculus**

Find the derivative of y with respect to x: y=(1+cosx)^6 y'=6(1+cosx)^5 How do you derive inside the brackets? The answer says -sin2x, but wouldn't it be -2sinx, using the chain rule.
*March 21, 2010 by sh*

**Calculus**

Im finding local Min and max of x^2/x-2 I know I take the derivative of the first one but how do i derive this one. And the second one especially don't know how to do.
*October 22, 2012 by Ally*

**Physical Chemistry**

Derive an expression for number of electrons N(E) with energy that can escape from a metal in terms of Z(E) (density of state) and F(E) (Fermi-dirac function) and ф (work function).
*November 18, 2011 by John*

**Math (Number Theory)**

the following two lines indicate another way to derive the formula for the sum of the first n integers by rearranging the terms in the sum. Fill in the details. 1+2+3+...+n=(1+n)+(2+(n-1))+(3+(n-2))+... =(1+n)+(1+n)+(1+n)+...
*April 21, 2014 by Tiff*

**Economics**

Consider the production function Q= 20K^(1/2)L^(1/2). The firm operates in the short run with 16 units of capital. a. The firm's short-run production function is Q=? b. The average product of labor function is AP=? c. The marginal product of labor function is MP=? d. Show that...
*October 31, 2011 by Catherine*

**Physics **

Considering the diagram below, derive the standard formula for the second moment of area and radius of gyration for a rectangle of length L and breadth B about an axis through its centroid and parallel to the long edge.
*May 2, 2011 by Mawuli*

**Astronomy**

Imagine that you have just discovered a strange object. This object is a distance D away, has a redshift z, and you measure a flux for it f. Derive an equation for the luminosity L of this object.
*April 28, 2014 by qwerty*

**Geometry **

Please help! I'm really confused on what it is asking. Use the formula for area of a triangle to derive the formula for the area of a regular polygon.
*May 15, 2014 by Clea *

**Calculus **

Use newtons method and the function f(x)=x^2-a to derive the mechanics rule. Mechanics Rule for approaching sqrt(a), a>0, is Xn+1=1/2(Xn+a/Xn), n=1,2,3,...
*July 20, 2012 by Elizabeth*

**chemistry**

I need to derive a net ionic equation after balancing: NA2PO4 (2-) +HI =? what I have so far is NA2Po4 +2HI = 2NAI +H3PO4 I can't get any farther but the answer is HPO4 (2-) +H =H2PO4 can someone help me with the steps?
*July 1, 2012 by Nancy *

**Physic II**

Suppose a capacitor having a capacitance of C fully charged to a voltage V and then discharged through a resistor R. Derive the equation (in terms of C,V,and R) that shows how long a time the capacitor will take to lose 45 % of its charge.
*March 13, 2014 by Buline*

**Pre Calc**

Derive the equation of the locus of all points that are equidistant from the point F(-3,4) and the line y=-2. Leave your answer in general form. [General Form: ax^2+by^2+cx+dy+e=0]
*September 14, 2010 by Asher*

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