Thursday
October 27, 2016

# Posts by help

Total # Posts: 1,293

Physics
May 8, 2013

Physic
Help!
May 7, 2013

physics
Three charges lie along the x-axis. At x = 2.0m, a charge of 15x10^-6 C is fixed. At the origin, a charge of 30x10^-6 is fixed (like in question #8). Where can a third charge be placed between them so it feels no net force?
May 6, 2013

physics
Charged spheres A and B are in fixed positions (like in question #6) and have charges 3.6x10^-6 C and -5.4x10^-6 C respectively. Calculate the net force on sphere C, which has a charge of -9.9x10^-6 C.
May 6, 2013

Maths
A+B+B=35. B+B+c=25. A+B+B+B+c=55 What is the value of B?
May 4, 2013

physic
Help!
May 1, 2013

physic
May 1, 2013

Physics
A 76.3-kN car is travelling at 68.7 mph when the driver decides to exit the freeway by going up a ramp. After coasting 355 m along the exit ramp the car\'s speed is 30.1 mph, and it is h = 14.3 m above the freeway. What is the magnitude of the average drag force exerted on...
April 29, 2013

coding
what code are assigned for a patient admitted for chemotherapy for an azathioprione. I drug induced aplastic anemia? The patient has peripheral neuropathy of multiple joints of the lower extremities secondary to severe rheumatoid arthritis Code(s) with the POA indicatior
April 29, 2013

math
jason and jenny went to see the movie Vampires From Mars. Jason told his mother, " The movie starts at 1:15 p.m. and is 2 hours and 56 minutes long, so it will end at 5:11 p.m. Please pick us up then." What was jasons mistake and how can it be fixed.
April 28, 2013

Chemistry
In the qualitative analysis scheme, what qualitative analysis principles are used to seperate Cu2+ from Al3+? Check all that apply. -Selective precipitation -Fractional precipitation -Amphoteric precipitate solubilization -Competitive equilibrium solubilization: anoion ...
April 24, 2013

physics
The velocity of sound in the atmosphere is c=300 m/s. An airplane is traveling with velocity v=600 m/s at an altitude of h=8 km over an observer. How far horizontally past the observer in kilometers will the plane be when the ...
April 21, 2013

physics
A neutral solid conducting cylinder rotates about its axis with angular speed 1600 rad/s. In addition, there is an external magnetic field of induction B directed along the cylinder's axis. What must the magnitude of the magnetic field in Teslas so that no ...
April 21, 2013

PHYSICS
A small block of mass 0.5 kg is released from rest at the top of a ramp of mass 3 kg that sits on a frictionless horizonal surface. When the block leaves the ramp it has a speed of 4 m.s a)what is the recoil velocity of the ramp b) how high is the ramp?
April 17, 2013

PHYSICS
A golf ball (m=0.46g is struck by a club on a 50 deg. angle over 7ms. If the bll lands 200 m away, what is the force delivered to it by the club
April 17, 2013

Chemistry
Calculate the standard potential, E^o, for this reaction from its equilibrium constant at 298K. X(s)+Y^2+(aq)= X^2+(aq)+Y(s) K=8.68E6 E^o=??V
April 17, 2013

Chemistry
A current of 4.60 A is passed through a Cr(NO3)2 solution for 1.10 hours. How much chromium is plated out of the solution?
April 16, 2013

Chemistry
A current of 4.60 A is passed through a Cr(NO3)2 solution for 1.10 hours. How much chromium is plated out of the solution?
April 16, 2013

HELP URGENT Phyiics
What mass (in grams) of steam at 100°C must be mixed with 446 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent ...
April 12, 2013

math
April 8, 2013

math
ted has 8 autographed baseballs. all together the baseballs are worth \$200.00 explain why you do not have enough information to make a bar diagram to find the value of each baseball.
April 8, 2013

Quantum Physics
6C and 6D
April 6, 2013

Quantum Physics
prob 3 C
April 6, 2013

MATH
a baseball team has 15 members, 3 of whom always play and bat at the top of the batting order. For the game Sunday, the starting lineup of nine players will be filed out from the remaining members and a batting order will be set. How many possible betting orders can be made?
April 5, 2013

physics
A man of mass 78.5 kg walks down the aisle of an airplane at a speed of 1.40 m/s in the forward direction while the plane moves at a speed of 320 m/s relative to the earth. (a) Find the man's kinetic energy relative to the plane. (b) Find the man's kinetic energy ...
April 4, 2013

physics
What are the first, second, and third frequencies audible from a 20 cm long organ pipe when (A) only one end is open and when (B) both ends are open. The speed of sound through the air inside the organ pipe is 343m/s. (Hint: if a harmonic does not exist, it would not be heard.)
March 28, 2013

CHEMistry
A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Using ...
March 27, 2013

physics
exp(2piji/M)beta j
March 20, 2013

physics
Got this result for above question: exp(2ðji/M)âj However it is graded as wrong, can someone help?
March 20, 2013

Quantum Physics
Meant thanks Helpman!
March 20, 2013

Quantum Physics
Thanks Anonymous and Gyanno! Anyone got Problem 3, 4 or 5?
March 20, 2013

Quantum Physics
Thank you! Did somebody figure out one or all of the QTF6 questions?
March 20, 2013

Quantum Physics
What is w? You can use e, pi, and M in your response. Please do not subtitute 6 for M. Got this result for above question but it is graded wrong, can someone help? e^i*pi/3
March 20, 2013

Quantum Physics
In Problems 1 to 5 we will work through example of QFTM for M = 6. Problem 1: What is w? You can use e, pi, and M in your response. Please do not subtitute 6 for M. Specify the probability amplitudes. You should use w to denote ƒÖ, but please fully simplify your ...
March 20, 2013

Quantum Physics
What is w? You can use e, pi, and M in your response. Please do not subtitute 6 for M.
March 20, 2013

Quantum Physics
Anyone for b, c, d?
March 18, 2013

Physics
A skier of mass 66 kg skis straight down a 11° slope at constant velocity. Draw a free-body diagram of the skier with the various external forces acting on her. Include the force of air resistance, which is directed opposite the velocity. (Do this on paper. Your ...
March 16, 2013

Math
A trainer for a professional football team keeps track of the amount of water players consume throughout practice. The trainer observes that the amount of water consumed is a liner function of the temperature on a given day. The trainer finds that when it is 90 degrees, the ...
March 13, 2013

math
A textbook store sold a combined total of 315 physics and chemistry textbooks in a week. The number of physics textbooks sold was two times the number of chemistry textbooks sold. How many textbooks of each type were sold?
March 7, 2013

math
the problem is 0 < less then or equal to 2x-4<8 I got the answer which is 2< less then or equal to x <6 how do i write this on a graph
March 7, 2013

algebra
solve the compound inequality write the solution in interval notation 2u+4>-6 and 3u-6> -3 =
March 7, 2013

DYNAMICS
The 10-lb has an initial velocity of 10ft/s on the smooth plane. If a force F=(2.5t), where t is in seconds, acts on the block for 3s, determine the final velocity of the block and the distance the block travels during this time.
March 5, 2013

DYNAMICS
The 10-lb has an initial velocity of 10ft/s on the smooth plane. If a force F=(2.5t), where t is in seconds, acts on the block for 3s, determine the final velocity of the block and the distance the block travels during this time.
March 5, 2013

Physics
An 67.6 kg object moving to the right at 38.7 cm/s overtakes and collides elastically with a second 48.9 kg object moving in the same direction at 19.2 cm/s. Find the velocity of the second object after the collision. Answer in units of cm/s
March 5, 2013

when a teacher tells you whats your novel, what does he or she mean?
March 4, 2013

social studies
just numbe 12 actualy
February 28, 2013

social studies
1. Which of the following helped to increase the populations of northeastern cities? (1 point) more diversity successful cotton crops growth of factories and trade building of the Erie Canal 2. A boundary was set between Canada and the United States as a result of (1 point) ...
February 28, 2013

math
what is mental math?
February 21, 2013

DYNAMICS
A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine thewvelocity of the car when t=4s. What is the displacement of the car during the 4-s time interval? How much time is needed to stop the car? How do i get the displacement?
February 17, 2013

DYNAMICS
A particle travels along a straight line with a velocity v=(12-3t^2) m/s, when t is in seconds. When t=1s, the particle is located 10m to the left of the origin. Determine the accelaration when t=4s, the displacement from t=0 to t=10s, and the distance the particle travels ...
February 17, 2013

DYNAMICS
A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine thewvelocity of the car when t=4s. What is the displacement of the car during the 4-s time interval? How much time is needed to stop the car?
February 17, 2013

math
Franco went to sticker station. He bought 2 strips of 10 and 6 singles of frog stickers. He also bought 5 strips of 10 and 2 singles of butterfly stickers. How many stickers did Franco buy?
February 6, 2013

math
Franco went to sticker station. He bought 2 strips of 10 and 6 singles of frog stickers. He also bought 5 strips of 10 and 2 singles of butterfly stickers. How many stickers did Franco buy?
February 5, 2013

math
Franco went to sticker station. He bought 2 strips of 10 and 6 singles of frog stickers. He also bought 5 strips of 10 and 2 singles of butterfly stickers. How many stickers did Franco buy?
February 5, 2013

Physics
A projectile (mass = 0.17 kg) is fired at and embeds itself in a target (mass = 2.84 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (with the projectile in it) carry off ...
January 22, 2013

physics
A movig particle encounters an external electric field that decreases its kinetic energy from 9670 eV to 7540 eV as the particle moves from position A to position B. The electric potential at A is -66.0 V, and that at B is +16.0 V. Determine the charge of the particle. Include...
January 18, 2013

physics
The membrane that surrounds a certain type of living cell has a surface area of 4.4 x 10-9 m2 and a thickness of 1.6 x 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 4.1. (a) The potential on the outer surface of the ...
January 18, 2013

physics (electric field)
The drawing shows the potential at five points on a set of axes. Each of the four outer points is 6.2 x 10-4 m from the point at the origin. From the data shown, find the magnitude of the electric field in the vicinity of the origin.
January 18, 2013

physics capacitor
What voltage is required to store 8.0 x 10-5 C of charge on the plates of a 6.1-μF capacitor?
January 18, 2013

Math
64y^3y^4/5
January 13, 2013

math
Thank you guys!
January 10, 2013

math
A drivers distance varies directly as the amount of time traveled. After six hours, a driver had traveled 390 miles. How far had the driver traveled after 4 hours?
January 10, 2013

FUNCTIONS 11
Write an equation for nth term in the sequence: -2, 5, -10, 17, -26
January 8, 2013

Math
PLEASE HELP I DON'T KNOW WHAT TO DO D': I don't understand what to do or how to even start.... In the town of Niceville, a local lottery is held once a year for the residents. Lottery tickets cost 50 cents apiece. Each lottery ticket contains four numbers, from 1 ...
December 30, 2012

in chem
can u please tell me the number of molar mass i was using...
December 24, 2012

in chem
calculate the mass of this sample: 1.05 * 10 to the power of 26 atoms of neon, Ne(g) I know that I have to first divide by the avagadros constant, then once get the moles I need to multiply by the molar mass of neon to get the grams, I did that sevral times but I keep on ...
December 24, 2012

Physics
cart A with mass: 512g (0.512kg) is on a horizontal table. the cart is connected to cart b with mass: 51.0g (0.051kg) through a string that is crossing a pulley. cart A is released from rest at 60 cm(0.60m), it passes a photogate with a velocity of 0.90m/s. What is the work ...
December 20, 2012

Chemistry
an explanation please? i need a formula!
December 14, 2012

Chemistry
can someone give me a formula?
December 14, 2012

calculus
find the function that is finally graphed after the following transformations are applied to the graph of y=square root x in the order listed. a. reflected about the y-axis b. shift down 3 units c. shifht left 9 units please show work
December 13, 2012

calculus
write the function whose graph is the function of y=(x+5)^2 but is reflected about the x-axis. y=
December 13, 2012

Algebra
Mr. Scrooge bought 4 packages of ground beef. The second package weighed three times as much as the first, and the third package weighed half as much as the second. The fourth package weighed fifteen ounces, which was three ounces more than the third package. How many ounces ...
December 12, 2012

chemistry
* A 50 gram sample of an unknown metal warms from 18 to 58 after absorbing 800 joules of energy. what is the specific heat of the metal? *copper has a specific heat of 0.387 j/g degree celsius. what is the mass of a piece of copper that undergoes a 21.0 C temperature change ...
December 11, 2012

Math
2) which set of measure could be the side lengths of a right triangle? A. 0.9 cm, 1.2 cm, 1.5 cm B. 4 in, 4 in, 4 in C. 7 m, 8m, 9m****** D. 2ft, 3ft, 4ft
December 6, 2012

Math
Sorry meant rational number?
December 6, 2012

Math
Which of these is an irrational number? A.. Sq root of 14 B. -sq root of 9 C. -sq root of 34 D. Sq root of 72
December 6, 2012

Math
1) 3r + 5 _____. + 2 = 12-2r 2 Find value of r
December 6, 2012

Chemistry
The fictitious compound, arrhenium fluoride ( ), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled with AhF to a ...
December 4, 2012

PHYSICS
After 6.00 kg of water at 80.4 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in entropy can be shown to be...
December 1, 2012

PHYSICS
The wattage of a commercial ice maker is 226 W and is the rate at which it does work. The ice maker operates just like a refrigerator and has a coefficient of performance of 3.90. The water going into the unit has a temperature of 15.0°C, and the ice maker produces ice ...
December 1, 2012

CHEMISTRY
The standard electrode potential for the reduction of Eu3+(aq) to Eu2+(aq) is −0.43 V. determine which of the following is capable of reducing Eu3+(aq) to Eu2+(aq) under standard-state conditions? (a) Sn2+(aq) (b) ln(s) (c) HCN(aq) (d) La(s)
November 30, 2012

statistics
Working on "Inferences from Dependent Samples" trying to find the standard deviation of the difference data. Differences: 24, 53, 100, 40, -10,71,77,70, 39, 50 n=10 d=51.4 sd=??? (Answer suppose to be 30.8336 but not coming close to this number at all)
November 30, 2012

CHEMISTRY
Co(s) will oxidize Fe(s) while leaving Cu(s) unreacted, please write a balanced equation for the reagent involved?
November 30, 2012

chem
A 0.01020 mg sample of an unknown compound was found to contain 0.0084 mg of C, and 0.0018 mg of H. It was also determined that the unknown compound had a molecular weight of 58.12 g/mol. What is the molecular formula for this compound?
November 29, 2012

Math
Sorry I repeated these question to you because I forgot to add there are repeating numbers or ellipsis.
November 29, 2012

Reiny, do u think 1st question about blankets should b written differently? For e.g. If we say b= 5, then the first part of the equation will equal 175+ 5= 80. I'm thinking it should be written as this: 25 (7+b) = 300 175 + 25b = 300 25b = 125 Pls let me know what you ...
November 29, 2012

CHEMISTRY HWK MAKES NO SENSE
How many grams of C are required to make 464.99 grams of this compound? compound= C3H8
November 29, 2012

Math
November 29, 2012

Math
Ok.. Can u check these for me too please? Rename each repeating decimal as a fraction in lowest terms. Using let statement, an equation, a proper solution (using properties of equality) 1) 0.87 (repeating nos are 87) So.. Let  X =    0.87 100X = 87.87 -   &...
November 29, 2012

Math
I know, but wanted to be sure about the let statement, equation parts they were asking for. Thanks.
November 29, 2012

Math
Tickets to King Middle School play cost \$1 for King students and \$3 for everyone else. Rose, a student at King Middle School, went to the play with friends from another school. the group paid a total of \$13 for the tickets. How many friends went to see the play with Rose? ...
November 29, 2012

Logic
Help this too!
November 4, 2012

math
please help, I'm having a hard time set up the problem. Thank you Sally drove a distance of 520 mile. Had she averaged 15mph faster, the trip would of taken 2.4 hours less. find the average speed that she drove.
October 29, 2012

algebra
Sally drove a distance of 520 mile. Had she averaged 15mph faster, the trip would of taken 2.4 hours less. find the average speed that she drove.
October 29, 2012

physics
A light of ray is incident at an angle of 58degrees on the plane surface of a block of glass of refractive index 1.60. Some light is reflected on the other side of the normal att he same angle as the angle of incidence. Find: a.the angle between the light reflected from the ...
October 24, 2012

Algebra
Year, t Sales, S(t) 1 62 2 246 3 664 4 1579 5 3258 6 8430 7 14,532 (c) If S−1 exists, find S−1(3,258).
October 24, 2012

physics
State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a -6.75DS?....
October 23, 2012

physics
is a =-6.75DS?...
October 23, 2012

physics
state the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS 6. +0.50 DS c. +1.75 DS
October 23, 2012

Math
Salted caramel is 100% thank you!!!
October 22, 2012

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