Monday
December 22, 2014

Search: physics what am i doing wrong?

Number of results: 64,935

algebra
Solve for s in this equation. Depreciation. D=C-s/n This is my answer D-C=C-s/n-c D-C=-s/n -n(D-C)=-s/n*(-n) -nD+nC=s s=n(C-D) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement is: D=C-s/n D+s/n=C s/n=C-D s=n(C-D) but hey, ...
April 4, 2007 by jessica

Physics Help me Someone plz
If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6 Thatz still wrong Physics...
May 7, 2013 by Leila

Physics
Which of the following are the correct units for mass? Tons, u, g, slugs, dyn, lb, oz, kg I put g, slugs, and kg but got it wrong. What part do I have wrong?
September 28, 2014 by Sandra

math
i got the following wrong, but don't know what I did wrong- die rolled 30 times, what is the expected value that a 5 will appear. I thought 3.5, but was told wrong. Help!
September 5, 2009 by constance

physics
I DONT KNOW WHAT IM DOING WRONG!!!!!!NASA has built centrifuges to enable astronauts to train in conditions in which the acceleration is very large. The device in the figure below shows one of these "human centrifuges." If the device has a radius of 8.3 m and attains ...
September 21, 2010 by tom

AP Physics
A Physics book has a height of 26 cm, a width of 22 cm, and a thickness of 4 cm. Find the pressure that the Physics book exerts on a desktop when the book lies face up and when the book is balanced on its spine. I know that P=F/A, I am just not sure which dimensions of the ...
November 15, 2009 by JL

english
What is wrong with these sentences then? I have been reading and studying abouy subject-verb agreements and I keep getting this wrong so I need help becauase I just got these wrong. 1. A number of my friends have bought new cars recently. 2.Each of his sisters go to a ...
July 24, 2009 by betty

Physics ~work shown pls help!
An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 10^−19 C and its mass is 9.10939 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1 cm? Answer in ...
April 15, 2011 by cr

Physics Plz help me
If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6 Thatz still wrong
May 7, 2013 by Leila

Calculus
Let f be defined as follows. y = f(x) = x^2 - 4 x (a) Find the average rate of change of y with respect to x in the following intervals. from x = 5 to x = 5.5 For some reason I keep getting this wrong. The way I did it was: f((5.5)-f(5))/(x2-x1)= 22-5/5.5-5=34 This is wrong, ...
February 4, 2011 by Anonymous

Physics
What is the speed of the wave represented by y(x, t) = A sin(kx − ωt),where k = 7.0 rad/cm and ω = 3.6 rad/s? answer should be in cm/s I tried to subtract 7-3.6= 3.4 which is wrong and I also divided 7/3.6=1.94 , but that is wrong too. I don't know how to do ...
April 13, 2012 by Reza

Physics
The four tires of an automobile are inflated to a gauge pressure of 1.8E10^5 Pa. Each tire has an area of 0.025 m2 in contact with the ground. Determine the weight of the automobile. I was helped with this before, but the answer was wrong. Can someone please help me, I keep ...
July 21, 2008 by Elisa

Physics
Water flowing through a 2.8 cm-diameter pipe can fill a 200 L bathtub in 5.8 min. Flow rate Q = volume/time = speed * cross section area Q=200/5.8=speed*.028....i get 1231.52 or Q=(200/348)=speed*.028...i get 20.52 both are wrong so what do i do? then i did speed=200/(pi*.25^2...
November 17, 2009 by ana

Maths
There was a question: A gallon jug of milk is 3/4 full. After breakfast, you drink 1/12 of the milk. What fraction is the gallon is left? And here was my answer: 1/12 drank --> 11/12 left 3/4*11/12=11/16 But I got the question wrong. Did I get it wrong? I got it correct, ...
October 28, 2013 by Nana

URGENT Spanish help please.
ok in the example it shows: Comprendes espanol? Si, lo comprende ok for this question it's asking 1) do you and your siblings practice tennis my response: no, no los practicamos.. it said i was wrong how would I correct that 2) it asked does your mother teach biology? My ...
April 1, 2012 by help

Physics
A concave mirror is constructed so that a man at a distance of 19 cm from the mirror sees his image magnified 2.0 times. What is the radius of the curvature? OK so I have tried to work this out and can't seem to find the answer. Here is what I got. Please let me know if you ...
October 28, 2012 by Rachel

English
They worked in the garden, but they worked wrong? What did they dod wrong? (Is the sentences grammatical? Do we have to use 'wrongly' instead of 'wrong'?)
November 7, 2012 by rfvv

Physics PLEASE
I'm trying to solve this problem Calculate (a) how long it took King Kong to fall straight down form the top of the Empire State Building (380 m high), and (b) his velocity just before "landing". My teacher said try and rearagne this equation for t X = Xo + Vo t + 2^-1 a t^2 I...
June 23, 2009 by Physics PLEASE

Physics
A 215 g mass attached to a horizontal spring oscillates at a frequency of 5.50 Hz. At t=0s, the mass is at x= 6.40 cm and has vx =- 45.0 cm/s. Determine: a) The Maximum acceleration to 3 significant digits. - I calculated this to be 7.64 but it keeps saying I have the wrong SD...
November 14, 2008 by Samantha

Math
John's car is 13 feet long. He is making a model that is 1/12 of the actual size. Which proportion below should be used to find the length, L, of the model? A(wrong) 13/L = 1/12 B(correct) L/13 = 1/12 C(wrong) L/13 = 1/L D(wrong) 12/L = 13/1 I don't get it! How is it B?
February 28, 2010 by Sarah

chemistry class
What is the pH of an aqueous solution at 25.0 C that contains 3.98 10-9 M hydroxide ion? i posted this before and i tried solving it but i get it wrong 14 = ph + - log (3.98 10-9) 14- 8.4 = ph 5.6 = ph but the correct answer is 8.400 what did i do wrong? or is the answer ...
November 22, 2010 by jessie

Physics *work shown ~ pls help!
An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 10^−19 C and its mass is 9.10939 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1 cm? Answer in ...
April 15, 2011 by cr

Physics
A rectangular loop of wire, L = 26.2 cm and W = 15.4 cm, carries a I1 = 1.83 A current and lies in a plane (d = 13.6 cm), which also contains a very long straight wire carrying a I2 = 10.5 A current. I used this equation: F1+F2 = mu0*I1*I2*0.262/(2pi)*(1/0.136-1/0.290)=2.57*10...
March 24, 2012 by josh

PLease Help Me IN Math
Problem: 25-x^2 6 ------ * --- 12 5-x What I Got: 5-x --- 2 *Please Check My Work And Tell Me If I am Correct or wrong.If I am wrong please help me as much as possible.Thank you~ Wrong. When are you going to factor the 25-x^2 ? The 5-x then will divide out. oh...so then will ...
February 26, 2007 by Margie

Physics
An object of mass m = 2.7 kg moves with initial speed vinitial = 2.2 m/s, then interacts with its environment, releasing 4.4 J of work. What is the speed of the object after the interaction is completed? My ans: I found KE initially and then subtracted 4.4J and with the new ...
November 17, 2009 by Nikita

math11
Solve the non linear equation x^2=3x+4 graphically using a calculator, Write the equations of the graphs you used to find the solution. I got this question wrong what would be my Y1= and Y2= equations. Not sure what I'm doing wrong but whenever I have an x^2 I get them wrong.
October 19, 2010 by Juliet

math11
Solve the non linear equation x^2=3x+4 graphically using a calculator, Write the equations of the graphs you used to find the solution. I got this question wrong what would be my Y1= and Y2= equations. Not sure what I'm doing wrong but whenever I have an x^2 I get them wrong.
October 19, 2010 by Juliet

Physics
What is the work required to raise a 10. kg object from the surface of the Earth to a height of 2.0 m? 5.0 J 20. J 2.0 E2 J 2.0 E3 J My answer was 20. J but this was wrong. Is the answer 2.0 E2 J? A net force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The ...
October 22, 2009 by Hannah

physicS
A skier is gliding along at 6.93 m/s on horizontal, frictionless snow. He suddenly starts down a 17.2 incline. His speed at the bottom is 29.7 m/s. What is the length of the incline? i understand that the equation used is gH= change in (v^2)/2 so i plug in 9.8H=(29.7^2-6.93^2...
October 8, 2010 by Jason

Chemistry
NEWW- 0.10 M methylamine (CH3NH2) kb= 4.38e-4 calc the percent ionization so i did the ICE table to find that x=6.62e-3 (that was a typo the first time) and then i divided by .1 and then multiplied by 100. but i got the wrong answer whats did i do wrong? my answer was 6.62% ...
February 15, 2009 by Spencer

college physics
A 2.0 kg disc rolls without slipping on a horizontal surface, so that its center of mass has a constant linear speed of 6.0 m/s. What is the total kinetic energy of the disc? i know that k= 0.5mv2 + 0.5 I w2 K=1/2 mv2 (1+(I/mr2) but i am still getting he wrong answer because i...
November 5, 2009 by Mary

Physics
Okay, I saw this one previously posted, but the answer it kept leading me to was wrong. A sports car of mass 1400kg (including the driver) crosses the rounded top of a hill (radius 88m) at 23 m/s. Find the normal force exerted by road on the car. I thought that the normal ...
March 7, 2010 by Morgan

Re: Physics/Math
A can of sardines is made to move along an x axis from x1 = 0.2 m to x2 = 1.2 m by a force given by F = iF0exp(-0.4x), with x in meters and F0 = 4.5 N. (Here exp is the exponential function.) How much work is done on the can by the force? For Further Reading * Physics/Math - ...
March 2, 2007 by Technoboi11

College Physics
I'm asked to find the shortest wavelength photon emitted for the paschen series for the hydrogen atom. I used the Rydberg equation and substituted the appropriate values. Frequency= Rh(1/3^2)-(1/infinity^2) I get an answer of 820 nm. My online homework program said this answer...
April 19, 2011 by Dave

psychology
sociocultural theory interplay of genetic inheritance and environment(right) impact of being African American on your learning abilities (wrong) role of the unconscious in learning(wrong) role of consciousness in child development(wrong)
December 14, 2008 by ourania

physics- what did i do wrong
If the bus is 100 meters ahead of the car and the bus is travling at 65 km/hr and the car at 78km/hr, how long will it take the car to catch the bus? I used the following formula, but was informed my answer was wrong. 100m + (t) 65km/hr = 0 + (t)78km/hr and solved for (t). t...
August 29, 2007 by jeff

Physics
An empty cart, tied between two ideal springs, oscillates with ω = 10.1 rad/s.A load is placed in the cart, making the total mass 3.9 times what it was before. What is the new value of ω? rad/s This is how I did it, but its wrong 3.9/3=1.3 then 1.3x10.1=13.13 rad/s I...
March 30, 2012 by Romy

Physics Circular motion
A car starts from rest on a curve with a radius of 110m and accelerates at 1.2m/s^2. Through what angle will the car have traveled when the magnitude of its total acceleration is 2.1 m/s^2? I thought i got the answer which was 0.75 rad or 43 degrees but it says its the wrong ...
October 8, 2012 by senko

6th grade Math
I got a problem wrong and I don't know why. Here it is: A highway construction warning sign blinks on and off. In all, the sign is on for 0.88 of each minute. For how many seconds is the sign on in 5 minutes? I multiplied 0.88 x 5 and got 4.40 but it was marked wrong. What did...
September 27, 2012 by Nicole

physics
A projectile of mass 0.550 kg is shot straight up with an initial speed of 22.0 m/s. (a) How high would it go if there were no air friction? I get 24.7m for this. (b)If the projectile rises to a maximum height of only 13.6 m, determine the magnitude of the average force due to...
November 3, 2011 by Kelsey

Math
Find the area of a circle whose circumference measures 100 cm. Area (to the nearest square centimeter) = cm2 I plugged in everything C = 2 r C=2x3.14x100= 628 <<< The computer said it was WRONG ! Then, I tried C= 2X3.14X50= 314 !!! If I am wrong can you EXPLAIN to me ...
June 28, 2013 by sarah

Advanced Accounting
Mr. Right and Mr. Wrong own an antique store in a partnership. They share profits and losses equally and receive an annual salary of $50,000, as per the partnership agreement. Mr. Right travels the country buying antiques. Mr. Wrong manages the store. From time to time, they ...
December 3, 2012 by Angie

physics what am i doing wrong?
Three masses are arranged in the (x, y) plane. 3kg (0,0) 7kg (10,0) 6kg (0,3) What is the magnitude of the resulting force on the 3 kg mass at the origin? The value of the universal gravitational constant is 6.6726 10^−11 N m^2/kg^2. Answer in units of N what ive ...
November 16, 2012 by michelle

Physics - check my work
A cannon is fired from a cliff 190 m high downward at an angle of 38o with respect to the horizontal. If the muzzle velocity is 41 m/s, what is its speed (in m/s) when it hits the ground? Please check my work. I think its wrong, but I dont know where Im messing up Vx = 41 ...
November 9, 2007 by Lindsay

Physics
An electron passes location <0.02m, 0.04m,−0.06m>, and 4 μs later is de- tected at location <0.02 m, 1.84 m,−0.86 m>. Find the average velocity of the elecron: v = <vx, vy, vz> If the electron continues to travel at this av- erage velocity, ...
January 19, 2014 by NADIA

Physics
A rectangular piece of gold is 3.1 cm long and 3 cm wide. Resistivity of gold is 2.4*10^-8. How deep is the piece when it displays a resistance of R = 1.65 μω for a current that flows along the depth-direction? I used R=(p*l)/A and solved for l. I got the answer ...
March 8, 2010 by Lily

Physics
for some reason I keep on getting 1.2 seconds for (b) and .86 m for (a) The back of the book has the same answers for (a) but has 1.5 seconds for (b) i do not see what I'm doing wrong. Can someone confirm that I'm wrong or right??? A blcok is given an intial speed of 3.0 m/s ...
December 20, 2009 by Jake

Physics Need quick help please
Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me out...thanks Physics...
May 8, 2013 by Leila

Physics 11
The brakes on a car permit it to decelerate at the rate of -8.0m/s^2. How much distance is required to stop this car when it is travelling 60.0km/hr? The answer given is 173.6m I solved it this way 60km/h = 16.667m/s A=V/T 16.667m/s / -.80m/s^2 = 20.834 seconds D=RT 16.667m/s ...
February 6, 2008 by David

Algebra: Help Please
For the given function, compute the missing values in the following table. f(x) = 8x i got the negatives wrong, but I know how to solve for it. Is there a reason it is wrong? -3: -1/512 -2: -1/64 -1: -1/8 (^These were wrong, but I don't know how to solve it) 0: 1 1: 8 2: 64 3...
February 23, 2012 by Ann

Re: PHYSICS
A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to the flatcar. What is ...
February 27, 2007 by COFFEE

chemistry
Formal charge: kind of confused? why cant i get -1? i just want to know if the way im solving it, if its completely wrong. i have a test soon. please help! tinypic . com /view.php?pic=14buuti&s=7 ok in class we did this. and for O FC= 6-4-3=+1 but S FC = -1 (I get 6-4-1= +1) ...
February 13, 2011 by jessie

URGENT Needs Physics Help
Ok, so I am doing this paper on the physics mistakes in Willy Wonka and the Chocolate factory. To prove that the everlasting gobstopper defies the laws of physics, I wanted to use Zeno's paradoxes to do so. But are his paradoxes correct? There are theories online that say they...
December 16, 2007 by Desperate

Urgent Needs Physics Help
Ok, so I am doing this paper on the physics mistakes in Willy Wonka and the Chocolate factory. To prove that the everlasting gobstopper defies the laws of physics, I wanted to use Zeno's paradoxes to do so. But are his paradoxes correct? There are theories online that say they...
December 16, 2007 by Desperate--REPOST

MATH 2B Calculus
Consider the area between the graphs x+4y=14 and x+7=y^2. This area can be computed in two different ways using integrals. First of all it can be computed as a sum of two integrals They ask to use two integrals so i put f(x) from -7 to 2 which is correct but for g(x) i put 2 ...
August 20, 2010 by TOMO

PHYSICS, still cant get it
A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to the flatcar. What is ...
February 27, 2007 by COFFEE

Physics
A capacitor is made from two 1.2 cm diameter coins separated by a 0.18 mm thick piece of paper (K = 3.7). A 6 V battery is connected to the capacitor. How much charge is on each coin? My solution: C= K * Permitivity * A/d = q/v I solved for q and got 1.2 X 10^-10 But i still ...
February 6, 2008 by BLESSED

physics
A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located at an angle of 35.0...
October 24, 2011 by carlton

physics
A charge of 8 pC is uniformly distributed throughout the volume between concentric spherical surfaces having radii of 1.7 cm and3.7 cm. What is the magnitude of the electric field 2.6 cm from the center of the surfaces? Let k_e=8.98755*10^9 N*m^2/C^2 I used the formula E=k_e(Q...
September 18, 2011 by alex

physics
i am going a center of gravity problem, with the x=w1(x1)+w2x2..../ W1+W2.. and i keep getting the wrong answer can someone please tell me what i am doing wrong this is the problem:Four objects are situated along the y axis as follows: a 1.94 kg object is at +3.27 m, a 2.76 kg...
February 1, 2012 by Kaity

Physics 11
I need help on this question 79 g of water at 95 degree Celsius were added to tap water at 22 degree Celsius, and the Temperature of the mixture after all thermal energy transfer ended at 36 degree Celsius. What was the mass of the tap water? (teacher's answer key : 412 grams...
November 16, 2009 by Andrew

Physics: Energy & Work Done
A spring of negligible mass has a force constant k = 1600 N/m. You place the spring vertically with one end on the floor. You then drop a 1.20 kg book onto it from a height of 0.8 m above the top of the spring. Find the maximum distance the spring will compress. The answer is ...
September 14, 2012 by Anonymous

Physics * (Wht am I doing wrng? answ provided)
A 6 kg block slides on a horizontal frictionless surface with a speed of 1.5 m/s . It is brought momentarily to rest when it hits a bumper that compresses a spring. The acceleration of gravity is 9.8 m/s2 .How much is the spring compressed if its force constant is 7 kN/m? ...
March 11, 2011 by cr

math
I am doing something wrong when I work this question. Can someone show me the steps. I have the answer. x<5.189 The sum of the costs in parts a and c is less than $120. Write and solve an inequality to determine the possiblities for the number of compact disks Merle ...
April 14, 2007 by priscilla

physics
A 34 g glass thermometer reads 21.6C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! ...
April 26, 2012 by Akbar

Physics
A 4.5 g bullet is stopped in a block of wood (m= 5.04 kg). The speed of the bullet-plus-wood combination immediately after the collision is 0.298 m/s. What is the original speed of the bullet? Answer in m/s. I did it like this and got it wrong: mv=MV .298= (.0045kg)(velocity) ...
March 2, 2008 by Marcy

Physics
A student argues that as a satellite orbits the earth in a circular path, it moves with a constant velocity and therefore has no acceleration. The professor claims that the student is wrong since the satellite must have a centripetal acceleration as it moves in its circular ...
February 8, 2012 by sarah

physics
A student argues that as a satellite orbits the earth in a circular path, it moves with a constant velocity and therefore has no acceleration. The professor claims that the student is wrong since the satellite must have a centripetal acceleration as it moves in its circular ...
February 8, 2012 by julia

physics please help
Find Beta and Gamma for an electron that has a kinetic energy of 6.00 keV. gamma = KE/MoC^2 + 1 Beta = 1/gamma^2 + 1 gamma = 1.011723381 Beta = 1.9769592 I am getting gamma right but I am getting Beta wrong what I'm I doing wrong??
April 18, 2010 by Andy

Calculus-help please
f(x)=(9x^28)^6(4x^25)^11 What's f'(x)= i found (9x^2-8)^6 *11(4x^2-3)^10*8x+((4x^2-3)^11)6(9x^2-8)^5*(18x) but my electronic homework says it wrong what did i do wrong?
April 30, 2008 by John

Factor Completely
c^2 - 4c - 32 I got (c - 4) (c - 8) but i think its wrong because the do not match to make it squared, what am I doing wrong?
January 25, 2009 by Jennifer

2nd grade
what is the wrong verb in this sentence? One person done something wrong?
February 17, 2010 by ronald

Derivative
Find dy/dx for the following: 1) x^3 + 3x^2*y + y^3 = 4 I get -3(x+2y)/x^2 + y^2 it's wrong though. 2) x + y^2= xy^2 I get y^2 + 1/ 2y- 2xy this is also wrong. can you explain thanks
March 20, 2013 by Maryanne

English
1. Is there something wrong with her? 2. Is there anything wrong with her? (Are both grammatical? What is the difference between them?)
December 3, 2013 by rfvv

Algebra
2r-5s=-14 5r+2s=23 I know the answer is s=14 and r=3 but how do I wirte this down on my assignment? If I entr it wrong, I will get it wrong.
April 11, 2009 by Shannon

French
What's wrong with this sentence? Un "A" est meilleure q'un "F". I think there's something wrong with q'un
May 27, 2009 by Angie

Chemistry
What is wrong with these sets? Fix what's wrong: n=4, l=3, ml=4 n=2,l=-1, ml=1 I don't exactly even know what the question is asking!
November 30, 2011 by Maggie

Physics (maybe it's just math)
A sphere of copper is subjected to 89.7 MPa of pressure. The bulk modulus is 130 GPa. a) By what fraction does the volume of the sphere change? b) By what fraction does the radius of the sphere change? for a) I have dV/V = 0.00069 - this is correct. for b) the area I have 4/3 ...
November 17, 2012 by Brenda

algebra 1
-2/3z=-4/9 i tried to solve, but i keep on getting the wrong answer, and i do not understand what i am doing wrong. please help.
October 4, 2009 by zoey

Math
I had to simplify the expression: -5exponent2(squared) I got the answer of 25 wrong. Why is that wrong?
January 17, 2011 by Julie

Chemistry
Calculate the pH after 0.10 mol of HCl is added to 1.00 L of the solution that is 0.57 M HF and 1.13 M KF. I got 3.01, but it is wrong. What did I do wrong?
March 27, 2011 by Mary

physics
Question Part Points Submissions Used 1 2 3 4 5 0/5 /5 5/5 0/5 0/5 1/10 0/10 1/10 2/10 2/10 Total 5/25 A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car ...
October 22, 2011 by carlton

Chemistry
At 1100 K, Kp=0.25 for the following reaction. 2SO2(g) + O2(g) (reversible arrows) 2SO3(g) What is the value of K at this temperature? This is what I have so far: I did Kc=0.25(1100(0.0821))^-1 and got Kc=0.00276. That is incorrect. Why? What did I do wrong? I believe I gave ...
July 31, 2007 by Taasha

Physics: Focal length why is my answer wrong?
An old refracting telescope in a museum is 44.0 cm long and the caption states that the telescope magnifies images by a factor of 29.0. Assuming these numbers are for viewing an object an infinite distance away with minimum eyestrain, what is the focal length of each of the ...
October 28, 2010 by Sar

6th grade math
use compatible numbers to estimate the quotient: 7.35/6 answer: 1.20 is this wrong if so what did i do wrong? Thanks
November 8, 2010 by Meg

Algebra
What is the best estimate for 3 + (-14.9)(-2.3)? a 36 b 31 c 48 d 33 I came up with 36 but my teacher counted it wrong. I reworked it but still come up with A-36. What am I doing wrong?
November 5, 2013 by Daniel

Math
The problem is ; 10x+8-y X= 2 Y=5 Every time I do it I get 23 but my teacher says I'm wrong . where am I wrong ? someone help me please .
August 25, 2014 by Belle

physics
A tray is moved horizontally back and forth in simple harmonic motion at a frequency of f = 1.68 Hz. On this tray is an empty cup. Obtain the coefficient of static friction between the tray and the cup, given that the cup begins slipping when the amplitude of the motion is 2....
November 12, 2012 by stressedstudent

Physics
The equation of a wave along the x-axis is given as: ξ cm = 3.4 sin (1.16 x - 0.85 t) in which ξ is the displacement. Units on the right hand side are 1/cm for К and 1/s for ω. Determine the the traveling speed of the wave. im assuming you get k=1.16 and w...
January 16, 2010 by Vlad

Math Question
( (0.1095 mmol/mL)(25 mL) - (0.1482 mmol/mL)(29.04 mL) ) / ( (1000 mg/g)(1.3010 g) ) what is the answer i got -.0012 but its wrong Something is wrong with what you are trying to calculate. The first term has dimensions of millimoles and the second term has dimensions of ...
February 21, 2007 by chris

College Physics
I keep getting answer wrong. I don't know what I did wrong. I really need help please. I need help with 1 question. Can you help with this please if you don't mind? 1) Suppose you are given that z = c y^3/x^2 where c is some number. For a particular value of c, x and y, z is ...
August 26, 2012 by John

algebra
systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1 every time i do it is wrong and i cannot figure out what I'm doing wrong please help!!!
April 2, 2012 by ashley

Algebra
Need help finding composition of functions. I am doing something wrong continue to get wrong answer f(x)=x+6/x+5, g(x) = 2x-7. Find (fog)(x)
March 25, 2013 by Jackie

Math
Hi, I am getting very frustrated. I am doing an online homework for chemistry and it's telling me to round to the nearest WHOLE number. So the answer I got was -1435.650.... And I typed in -1436. and said I was wrong and so I tried it again and typed 1.4 x 10^3, wrong again. ...
August 4, 2010 by Anonymous

Algebra
In response to my previous question, I tried 115 tan 78.3. But I got -28.1. Is my calculator on the wrong setting or did I type it in wrong?
December 6, 2009 by Victoria

Algebra
Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9y/y(x+5) but it seems to be wrong Could anyone see what I did wrong. Thank you
September 21, 2010 by Anonymous

chem
Calculate [H3O+] for each of the following solutions. a)pH = 8.59 i got 3.00e-9 but it said it was wrong. what am i doing wrong. im using the equation 10-ph = [H30+]
April 6, 2011 by Beth

math
How do you solve this? 5x- [1.5 -3.6] [0.2 1.3] [-0.3 2.8]= [-5.6 1.7] 5x/5[-1.5 -3.6] [0.2 1.3] [0.3 -2.8]=[-5.6 1.7] x = [-1.5 3.6] [0.2 1.3] [0.3 -2.8]=[-5.6 1.7] [-1.5 + 0.2 + 3.6 + 1.3] [0.3 + -5.6 + -2.8 + 1.7] x = [-1.3 4.9] [-5.3 -1.1] I have tried to work this out ...
October 27, 2014 by treshia

Algebra
m=8/9,(6,-4) I can get to the last step but my answer is always wrong what am i doing wrong
December 6, 2009 by Julie

Physics
Two point charges lie on the x axis. A charge of + 6.5 C is at the origin, and a charge of -1.5 C is at x = 10.0 cm. What is the net electric field at x = -2.0 cm? I found the electrical field for each charge using the equation E= k(q)/ r^2. My calculations were: For the ...
July 7, 2007 by micole

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