Thursday

April 24, 2014

April 24, 2014

Number of results: 96,604

**Math - Possible or Potential rational zeros**

List all possible (or potential) rational zeros for the polynomial below. Find all real zeros of the polynomial below and factor completely over the real numbers. Please show all of your work. f(x) = x^4 - 7x^3 - 3x^2 + 19x + 14
*Wednesday, June 1, 2011 at 9:06pm by CheezyReezy*

**Math - potential zero**

List all possible (or potential) rational zeros for the polynomial below. Find all real zeros of the polynomial below and factor completely over the real numbers. Please show all of your work. f(x) = x^4 - 7x^3 -3x^2 + 19x + 14 Help
*Wednesday, June 1, 2011 at 10:01pm by CheezyReezy*

**Chemistry **

Explain with reference to the Nernst equation, how is it possible for a cell to have a positive cell potential understandard conditions but the negative cell potential under other conditions.
*Thursday, December 2, 2010 at 10:41pm by Liliy*

**ap bio**

15. The threshold potential is of great significance in the physiology of neurons because if the threshold potential is not reached, __________. A.the neuron cannot regain its resting potential B.the action potential will be "inversed," with a flux of sodium out of the cell ...
*Thursday, November 6, 2008 at 4:41pm by carol*

**chemistry**

How can I solve the following ecercise: Use perturbation theory to calculate the energy levels of a particle in a box with a cosine function botto. Let the box extend from x=a to x=a and let the perturbing potential be H' = V0[1+cos(2*Pi*m*x/a)]. This potential oscilates ...
*Wednesday, June 15, 2011 at 11:15am by Juan Manuek*

**Quantum physics**

How can I solve the following ecercise: Use perturbation theory to calculate the energy levels of a particle in a box with a cosine function botto. Let the box extend from x=a to x=a and let the perturbing potential be H' = V0[1+cos(2*Pi*m*x/a)]. This potential oscilates ...
*Wednesday, June 15, 2011 at 12:07pm by Juan Manuek*

**Psychology**

The voltage at a receptor site has just changed from -70 millivolts to -75 millivolts as a result of an _______ and will ________. a). inhibitory postsynaptic potential;increase the likelihood of an action potential. b). excitatory postsynaptic potential;decrease the ...
*Thursday, October 3, 2013 at 1:31am by Jesse*

**quantum chemistry or physics**

How can I solve the following exercise: Use perturbation theory to calculate the energy levels of a particle in a box with a cosine function botto. Let the box extend from x=0 to x=a and let the perturbing potential be H' = V0[1+cos(2*Pi*m*x/a)]. This potential oscilates ...
*Thursday, June 16, 2011 at 1:43pm by Juan Manuek*

**science - physics**

A potential charge of magnitude 2.0uC is moved between two points X and Y Point X is at a potential of 6.0V and Point Y is at a potential of 9.0 V Find the gain in potential energy of Point charge
*Saturday, May 4, 2013 at 5:38am by BINA*

**Biochemistry**

A cell has a resting membrane potential of -66 mV and a membrane Cl ion equilibrium potential of -24.0 mV If a neurotransmitter acts on the cell membrane to open channels that are specifically permeable to Cl, will the membrane potential of the cells change? In which direction...
*Monday, December 7, 2009 at 3:36pm by Sean*

**Chemistry**

Calculate the cell potential for the following reaction as written at 79C given that [Zn^+2] = 0.819 M and [Ni^+2] = 0.014 M. Zn + Ni^+2 = Zn^+2 + Ni I know: E=E -RT/nF ln Q reduction potential for Ni= -0.26 reduction potential for Zn = -0.76 so E standard potential = 0.5 E= 0...
*Sunday, April 29, 2012 at 1:20pm by Mima*

**Physics electric potential energy difference**

A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations?
*Friday, November 22, 2013 at 10:03am by Carl*

**physics**

What does it mean to say the Coulomb Force is a conservative force? This is what I have compiled, but I still feel like I'm missing something. A conservative force is one in which energy cannot be created nor destroyed, and with the property that the work done in moving a ...
*Monday, July 23, 2012 at 11:56am by Coty*

**Humanities**

What pitfalls or potential problems do you imagine are possible? How might we work together to avoid them?
*Wednesday, September 16, 2009 at 5:27pm by Danny*

**Physics**

Electric charge charge is distributed uniformly along a thin rod of length "a", with total charge Q. Take the potential to be zero at infinity find the potential at P. If z>>a, what would be the potential at p? From potential find the electric field at point p for z>&...
*Wednesday, May 22, 2013 at 12:39am by Anne*

**AP Bio Lab**

the water potential of a solution is equal to the osmotic potential plus the pressure potential. Since there is no differential pressure acting on teh solution, the pressure potential is equal to 0 making teh water potential equal to the osmotic potential. If the equilibrium ...
*Thursday, October 2, 2008 at 11:28pm by Simone*

**chemistry**

Write the oxidation and reduction half-reactions of a corroding galvanized nail exposed to rain. The question says "galvanized" so its zinc. Zn(s) -> Zn2+(aq) + 2e- potential: +0.76V rain is slightly acidic, so i thought it would be O2(g) + 4H+ + 4e- -> 2H2O potential: +...
*Friday, February 15, 2008 at 5:28pm by william*

**current and magnetism**

A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations? I tried the ...
*Sunday, November 24, 2013 at 1:27am by James *

**Math**

Find the perimeter of the triangle with vertices at A (0, 0), B (-4, -3) and C (-5, 0). If it is not possible, write “not possible” and explain why it is not possible.
*Thursday, June 23, 2011 at 1:07pm by Adrian*

**physics**

5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. b. Calculate the wavelength of light emitted with the shortest possible ...
*Sunday, April 13, 2008 at 10:58am by Sandhya*

**BUSINESS**

To find out as much as you can about the market for your potential business, be sure to talk to A. potential employees. B. the local bookstore owner. C. potential customers. D. anyone who may compete with you locally. I have no idea what to chose. I know its not C. Is it D or B?
*Monday, February 10, 2014 at 5:46pm by Beatrice*

**Physics**

A charge of 0.25 C moved from a position where the electric potential is 20 V to a position where the potential is 50 V. What is the change in potential energy?
*Monday, April 18, 2011 at 3:42pm by Mikie*

**math**

the formula for potential energy is p=mgh, where p is potential energy, m is mass, g is gravity, and h is height. what expression can be used to represent g?
*Friday, May 30, 2008 at 5:27pm by derek*

**math**

the formula for potential energy is p= mgh, where Pis potential energy, m is mass, g is gravity, and h is height. which expression can be used to represent g? 1 p-m-h 2 p-mh 3 p/m0-h 4 p/(mh)
*Thursday, May 7, 2009 at 9:23pm by Anonymous*

**physics**

If a negative charge is initially at rest in an electric field, will it move towards a region of higher potential or lower potential? What about a positive charge? How does the potential energy of the charge change in each case?
*Sunday, May 27, 2012 at 5:57pm by myra*

**PHYSICS**

An electron iwth an initial speed of 500,000 m/s is brought to rest by an electric field. (a) Did the electron move into a region of higher potential or lower potential? (b) What was the potential difference that stopped the electron?
*Thursday, February 25, 2010 at 10:24am by Lucas*

**physics**

The potential energy of a particle on the x-axis is given by U= 8xe ^-x ^2/19 where x is 1 meter and U is in Joules. Can you explain for me how to find the point on the x-axis for which the potential is a maximum or minimum and is this answer a point of maximum potential ...
*Saturday, November 21, 2009 at 12:52pm by jon*

**physics**

(a) Find the potential at a distance of 0.920 cm from a proton. (Note: Assume a reference level of potential V = 0 at r = ∞.) V (b) What is the potential difference between two points that are 0.920 cm and 2.00 cm from a proton? V (c) Repeat parts (a) and (b) for an ...
*Sunday, October 13, 2013 at 2:23am by oxygen*

**College Physics**

A 22.9-kg child is on a swing attached to ropes that are L = 1.33 m long. Take the zero of the gravitational potential energy to be at the position of the child when the ropes are horizontal. Part A)The child's gravitational potential energy when the child is at the lowest ...
*Sunday, February 20, 2011 at 5:21pm by Emma*

**Physics**

An electron enters a region of space where the potential difference between two equipotential surfaces are 12 cm apart. One surface has a potential of 120 volts and the other potential of 75 volts. What is the magnitude and direction of the electric field in the region?
*Tuesday, September 7, 2010 at 4:46pm by Tommy*

**physics**

How much work (as measured in joules) is required to push an electron through a region where the potential change is +73 V? Assume the electron moves from a region of low potential to a region of higher potential. 1 J
*Wednesday, September 29, 2010 at 3:15pm by melody*

**Physics**

Which of the followning equations shows the relationship between the potential energy and height? Explain how you know. potential energy=m(height)+b potential energy=a(height)^2 +b(height)+c potential energy=a/height
*Monday, November 2, 2009 at 8:07pm by Willie*

**Physics**

A)Two point charges, +3.90 ěC and -7.50 ěC, are separated by 3.30 m. What is the electric potential midway between them? B)The drawing shows four point charges. The value of q is 1.3 ěC, and the distance d is 0.95 m. Find the total potential at the location P. Assume that the ...
*Saturday, October 8, 2011 at 2:37pm by Kristi*

**Physics**

what forms of energy are involved in the following situations? (choices: kinetic energy, potential energy - gravitational potential energy, elastic potential energy) a. a bicycle coasting along a level road b. heating water c. throwing a football d. winding the mainspring of a...
*Sunday, January 25, 2009 at 2:32pm by PB and apples*

**biology**

There is a beaker with 0.4% sucrose solution and the solute potential is -4. Inside the beaker, there is a dialysis bag with 01% sucrose solution, solute potential -1 and pressure potential 0. When the beaker is open to the atmosphere, what is the pressure potential of the ...
*Sunday, March 8, 2009 at 11:11pm by izzy*

**Biology**

In general, the frequency of APs in an afferent neuron is related to the amplitude of the receptor potential in the following way: a. exponentially. b. there is no general relationship. c. logarithmically. d. linearly. Is it exponentially? The other options make no sense. ...
*Wednesday, January 6, 2010 at 2:11pm by Alex*

**Us History**

The Lousiana Purchase removed a major point of contention between the United States and a European power but left many others. Which areas of possible conflict remained, and what were the sources of these potential conflicts?
*Wednesday, October 15, 2008 at 8:39pm by Cesar*

**us history**

The Lousiana Purchase removed a major point of contention between the United States and a European power but left many others. Which areas of possible conflict remained, and what were the sources of these potential conflicts?
*Wednesday, October 15, 2008 at 11:57pm by vania*

**Us History**

The Lousiana Purchase removed a major point of contention between the United States and a European power but left many others. Which areas of possible conflict remained, and what were the sources of these potential conflicts?
*Thursday, October 16, 2008 at 8:38pm by Raul*

**Math**

An access ramp enters a building 1 meter above ground level and starts 4 meters from the building. How long is the ramp? If it is not possible, write “not possible” and explain why it is not possible.
*Thursday, June 23, 2011 at 12:52pm by Jordan*

**Preap Physics!!**

Is gravitational potential energy different from potential energy?? Because I know gravitational potential energy's equation is PE=mass(gravity)(height)
*Tuesday, January 11, 2011 at 8:04pm by Jaeka*

**Math**

Is it possible for two right rectangular prisms to have the same volume yet not have the exact same dimensions? If it is not possible, explain why. If it is possible, give an example that proves the statement.
*Thursday, April 10, 2008 at 3:49pm by Tiffany*

**physics**

please check my answers what are the SI units for momentum? kg*m/s which of the following is not involved in hitting a tennis ball? a. kinetic energy b. chemical potential energy c. gravitational potential energy d. elastic potential energy i picked B How much power is ...
*Monday, February 16, 2009 at 8:35pm by y912f*

**Science**

Wil kinetic energy increase or decrease based on the amount of potential energy it starts with?? If potential energy is lost, KEnergy increases. Potential Energy + kinetic energy= constant.
*Monday, February 5, 2007 at 7:52pm by Linda*

**Electrochemistry**

Ag2CrO4(s) + 2e- 2Ag(s) + CrO42-(aq) A chemist wishes to determine the concentration of CrO42- electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE; which has a reduction potential of 0.242 V relative to the SHE) and a silver wire coated ...
*Tuesday, May 20, 2008 at 8:08pm by Daniel*

**physics**

During a particular thunderstorm, the electric potential between a cloud and the ground is Vcloud - Vground = 2.9 x 108 V, with the cloud being at the higher potential. What is the change in an electron's potential energy when the electron moves from the ground to the cloud?
*Wednesday, June 30, 2010 at 8:24am by Debi*

**uni physics **

A balloon of radius 30.0 cm is sprayed with a metallic coating so that the surface is conducting. A charge of 8.85×10−8 C is placed on the surface. What is the potential on the balloon's surface? 2.65×10^3 V Suppose that the some air is let out of the balloon, so that ...
*Wednesday, September 25, 2013 at 2:00pm by Aman*

**George School**

Ag2CrO4(s) + 2e- 2Ag(s) + CrO42-(aq) A chemist wishes to determine the concentration of CrO42- electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE; which has a reduction potential of 0.242 V relative to the SHE) and a silver wire coated ...
*Tuesday, May 20, 2008 at 8:02pm by Daniel*

**chemistry**

in a exothermic reaction ________ energy is converted to ________ energy. A. potential, kenetic B. kinetic, potential C. thermal, potential D. heat, thermal
*Saturday, March 5, 2011 at 2:53pm by emily*

**physics**

A parallel capicitor is made of two plates with cross sectional area A which are separated by a distance d (with a vacuum between the plates). The capacitor is connected to a battery until a charge Q is stored on it and a total potential difference VC is measured across the ...
*Thursday, March 14, 2013 at 12:28pm by k*

**Physics Please help !!**

A single conservative force = (6.0x - 12) N where x is in meters, acts on a particle moving along an x axis. The potential energy U associated with this force is assigned a value of 23 J at x = 0. (a) Write an expression for U as a function of x, with U in joules and x in ...
*Tuesday, October 23, 2012 at 12:05am by member of physics*

**Physics**

An electron is at the origin. (a) Calculate the electric potential VA at point A, x = 0.410 cm. (b) Calculate the electric potential VB at point B, x = 0.820 cm. What is the potential difference VB - VA?
*Friday, February 18, 2011 at 3:52pm by Greg*

**Physics**

2. Charge q1 is located at (0,+30 cm). Charge q2 is located at (0, -30 cm) q1 = +25 pC q2= -75 pC A) Calculate the potential energy of the charges B) Calculate V1, the electric potential at the orgin due to charge q1, and V2, the electric potential at the orgin due to charge ...
*Tuesday, April 12, 2011 at 12:00pm by YoungTangerine*

**Science**

Is this correct? The Energy Transformation of a Slingshot: elastic Potential-Kinetic-Potential
*Thursday, May 20, 2010 at 6:49pm by Chris*

**College physics**

Find the following potential differences. The magnitude of the potential difference DeltaV1 across the resistor of resistance R1 = 15.0 Ohm. The magnitude of the potential difference DeltaV2 across the resistor of resistance R2 = 45.0 Ohm. The magnitude of the potential ...
*Saturday, July 17, 2010 at 6:59pm by monique*

**Chemistry**

What does the density potential (also known as the electrostatic potential) measure? What do the colors on the images indicate?
*Monday, April 14, 2008 at 10:40pm by David*

**Science**

Is this correct? The Change of energy of a Slingshot: Elastic Potention-Gravitational potential-potential?
*Thursday, May 20, 2010 at 8:26pm by Chris*

**PHYSICS helppppp**

A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m. (A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of the baseball at the ...
*Monday, February 19, 2007 at 6:21pm by Katrina*

**Math**

For the harmonic potential V(x,y) = x^2 + y^2 a) Find the total differential, dV. For this I got dV = 2x.dx + 2y.dy b) Given that -dV = F(x).dx + F(y).dy, where F(x) and F(y) is the force in the x and y direction, respectively, write a differential equation describing the ...
*Tuesday, November 18, 2008 at 9:36am by Beth*

**Physics**

An electric force moves a charge of +1.40 x 10^-4 C from point A to point B and performs 4.70 x 10^-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two points? ____________J (b) Determine the ...
*Monday, September 3, 2007 at 8:20am by Mary*

**chemistry**

what does the density potential [electrostatic potential] measure?
*Saturday, April 12, 2008 at 7:04pm by peter*

**physics**

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud-Vground= 1.3x10^8, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves from ground to ...
*Wednesday, July 9, 2008 at 2:49pm by H*

**physics**

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 4.90 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves from the ...
*Tuesday, September 8, 2009 at 8:00pm by amber*

**physics**

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 4.3 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves from the ...
*Tuesday, March 9, 2010 at 10:17pm by Erin *

**college**

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 1.3 × 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves from the ...
*Friday, August 27, 2010 at 2:49pm by ash*

**physics**

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 1.10 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves from the ...
*Tuesday, January 18, 2011 at 6:21pm by Jess*

**Physics**

A 250 g object attached to a spring oscillates on a frictionless horizontal table with the frequency of 4 Hz and an amplitude of 20 cm. Calculate a) maximum potential energy of the system b) the displacement of the object when the potential energy is one-half of the maximum c...
*Monday, January 21, 2013 at 7:28pm by Rose*

**Chemistry**

A concentration cell based on the following half reaction at 317 K (Cu^2+) + (2e-) --> (Cu) SRP = 0.34 V Has initial concentrations of 1.33 M Cu2+, 0.393 M Cu2+, and a potential of 0.01665 V at these conditions. After 4.1 hours the new potential of the cell is found to be 0...
*Wednesday, February 15, 2012 at 8:07pm by Arron*

**math**

Is it possible to have a figure an area of 9 square units and a perimeter of 30? If not, why? (PS I dont think it is possible.)
*Thursday, December 6, 2012 at 3:46pm by Joey*

**Physics**

Consider a pair of parallel plates with a potential difference of 12 V and are separated by 12 cm. What is the potential energy of a 1.0 C charge at point A, exactly 30. cm from each plate?
*Saturday, March 16, 2013 at 8:49pm by Dan*

**Physics**

I need help with b... I found that k=.750880 for part a but I can't figure out what y would be to get potential energy. A 52 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 0.8 * sin( 3.8 * t ) where y is measured in ...
*Saturday, December 4, 2010 at 9:48pm by Anonymous*

**Physics**

1-A car is lifted a certain distance in a service station and therefore has potential energy with respect to the floor. If it were lifted twice as high, how much potential energy would it have? Answer: twice as much 2-Two cars, one twice as heavy as the other, are lifted to ...
*Wednesday, December 9, 2009 at 9:20pm by Emily*

***physics***

Electrons accelerated by a potential difference of 12.87 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. I don't know what equation to use. Any help would be greatly appreciated.
*Monday, March 24, 2008 at 11:31am by Beth Macbeth*

**UCI webworks Problem 9**

Use the labels (CV+, –OH, CVOH, , Ea (activation energy), & G) to complete the reaction potential energy profile below. More than one answer is possible for some spots a. ? b. iii c. iv d. ii e. i these are the correct answers. idk a but i know its not v, vi
*Monday, July 19, 2010 at 6:34pm by Screwed*

**chemistry**

I did a lab using an electrochemical cell to establish a relationship between cell potential and concentration. I derived two equations from lines of best fit. One is Cell potential of Ag vs. Cu Concentration: y = -0.04520x+0.5515. The other is cell potential of Zn vs. Cu ...
*Wednesday, November 10, 2010 at 10:00pm by Morgan*

**science 8th grade**

1. The thermal energy of an object is _____. (1 point) its potential energy its average kinetic energy its potential energy minus its kinetic energy its kinetic energy plus its potential energy Thanks, jessica :)
*Tuesday, April 9, 2013 at 8:05pm by jessie*

**Physics - Electric Potential**

A charge of - 0.15 C is moved from a position where the electric potential is 13 V to a position where the electric potential is 60 V. What is the change in potential energy of the charge associated with this change in position?
*Monday, April 1, 2013 at 3:33pm by Danielle*

**Math **

How many possible license plates are possible in which two letters are followed by at least 1 digit and no more than 4 digits?
*Thursday, February 17, 2011 at 8:27pm by ashley *

**Math (Proportions)**

Simplify each expression if possible by combining like terms. If not possible, write simplified 2x+9x I don't understand what to do
*Thursday, November 21, 2013 at 7:02pm by Jerald*

**Chemistry**

There exists a correlation between maximum electrostatic potential and acid strength. As pKa decreases (acid strength increases), the maximum electrostatic potential for a molecule increases. Given a particular acid, is there any way to determine the maximum electrostatic ...
*Sunday, March 21, 2010 at 10:00pm by Joe*

**Physics**

1)A 2.0-V battery is connected in a circuit with an ammeter and an unknown resistor, P. The current is observed to be 0.70 A. What would be the current in the circuit if a 12-V battery replaces the 2.0-V battery? A)4.2 A B)6.0 A C)8.4 A D)34 A I got A 2)Which appliance ...
*Wednesday, April 9, 2008 at 2:52pm by Jon*

**Math-Calculus**

Question Details: Suppose f(3)=2, f '(3)=1/2, and f '(x)> 0 and f "(x) < 0 for all x. (a) Sketch a possible graph of f (b) how many solutions does the equation f(x)=0 have? Why? (c) Is it possible that f '(2) = 1/3? Why?
*Wednesday, October 1, 2008 at 10:12pm by Anonymous*

**Math**

I'm supposed to evaluate the following equation in the real number system f possible : (-9)^1/2. The answer says it's not possible; why, I don't understand this.
*Thursday, October 23, 2008 at 10:49pm by Luci*

**Math**

Can someone explain to me the greatest possible error when finding the maximum and minimum possible lengths of something?? PLEASE!!!
*Tuesday, September 20, 2011 at 7:39pm by Jailyn*

**physics**

A single conservative force F = (6.0x - 11)i N, where x is in meters, acts on a particle moving along an x axis. The potential energy U associated with this force is assigned a value of 24 J at x = 0. (a) What is the maximum positive potential energy? At what (b) negative ...
*Monday, February 18, 2008 at 11:32am by dawn*

**physics**

An electric charfe of -3 C is moved from a position where the electric potential is 1 V to a position where the electric potential is -6V. What is the chsange in potential energy of the charge with this change in position? I know that change in PE = k(q1q)/r_2 - k(q1q)/r_1 I ...
*Wednesday, March 5, 2008 at 5:28pm by Andrea*

**physics**

A single conservative force F = (7.0x - 11)i N, where x is in meters, acts on a particle moving along an x axis. The potential energy U associated with this force is assigned a value of 29 J at x = 0. (a) What is the maximum positive potential energy? At what (b) negative ...
*Monday, November 29, 2010 at 10:22pm by kate*

**Physics**

What is the difference between electric force, electric potential energy, electric field strength, electric potential, and electric potential difference?
*Friday, July 20, 2012 at 9:33am by KnowsNothing*

**Math 11**

Is it possible to construct a rectangle whose length is 1cm less than twice its width, and whose area is 40cm^2? If your answer is yes, determine the dimensions of the rectangle to the nearest tenth of a centimetre. If your answer is no, explain why it is not possible. I know ...
*Wednesday, February 13, 2013 at 12:51am by Kat*

**Inorganic chemistry**

The following electrochemical cell has the potential of +0.617V at 25 degrees Celsius Pt ! H2(g, 1.00 atm) ! H+ (aq, 1.00M !! Ag^+(aq) ! Ag The standard reduction potential, E naught, of Ag^+ = 0.799V. What is the Ag+ concentration?
*Saturday, April 11, 2009 at 11:15pm by Steve*

**science-physics/math**

What is the largest possible displacement resulting from two displacements with magnitudes 3 m and 10 m? do you have to use a^2+b^2=c^2 What is the smallest possible resultant?
*Saturday, October 13, 2007 at 10:35pm by Tom*

**physics**

1) A parallel plate capacitor has a potential difference between its plates of 1.2 V and a plate separation distance of 2.0 mm. What is the magnitude of the electric field if a material that has a dielectric constant of 3.3 is inserted between the plates? 2) Three point ...
*Monday, October 9, 2006 at 6:52pm by kevin*

**physics**

i am confused with the concept when electrons flow from the negative terminal to the positive terminal of a battery then why the negative one is called lower potential and positive one higher potential while the difference in negative charges is termed as potential difference?
*Thursday, September 26, 2013 at 10:49am by help(in much need)!!!!!!!!!!!!!!!!!!!!*

**Math**

There are 4 quarterbacks and 6 centers on a football team that has 60 players. How many quarterback-center pariing are possible? I think there would be 4 possible but don't know if this is correct. Please help! Thank you in advance.
*Monday, September 17, 2007 at 8:14pm by Plshelp*

**12th Calculus**

the sum of two nonnegative numbers is 20. find the number if a. the sum of their squares is as large as possible; as small as possible b. oen number plus the square root of th eother is as large as possible; as samll as possible
*Tuesday, November 18, 2008 at 11:01pm by dt*

**statistic & probability**

Question: a resturant offers 6 possible appetizers, 11 possible main courses, and 5 possible desserts. How many different meals are possible at this restuant? two meals are considered different unless all three courses are the same. is it (22 C 3)?
*Wednesday, June 13, 2012 at 9:59pm by Anonymous*

**Physics**

1-A car is lifted a certain distance in a service station and therefore has potential energy with respect to the floor. If it were lifted twice as high, how much potential energy would it have? Answer: twice as much 2-Two cars, one twice as heavy as the other, are lifted to ...
*Wednesday, December 9, 2009 at 10:44pm by Emily*

**physics**

Why is it impossible for a skier to reach maximum speed that is physically possible by converting the change in height to speed? what is this question asking? Some of the potential energy available is lost due to friction. Friction on the skis, friction on the air.
*Thursday, May 31, 2007 at 10:09pm by Sam*

**Physics**

3) a) Calculate the unstretched length of a spring, which has a Hooke's constant of 40N/m and is 56cm long when supporting a stationary 800g object. I did mag = kx (0.800)(9.81) = 40x x = 0.20m l-x = u 56-20 = u u = 36cm Is that right? b) The period with which the object would...
*Monday, May 19, 2008 at 11:10am by Alex*

**electric fields, showed work**

imagine sitting a distance r from a charge q. you measure both the electric field and electric potential. now imagine that the charge is halved and you move three time as far away. you measure the field and potential again. b what factor has the electric field changed? by what...
*Wednesday, January 28, 2009 at 4:26pm by Anonymous*

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