Phy

Most popular questions and responses by Phy
  1. Physics

    A point charge Q1=-2 microcoulomb is located at x=0, and a point charge Q2=+8 microcoulomb, is placed at x=-0.5 on the x axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,at various points along the x axis.

    asked on February 25, 2013
  2. Physics

    A charge of q1=1×10−6 C is located at corner A of an equilateral triangle. A charge q2=4×10−6 C is located at corner B and a charge of q3=7×10−6 C is located at corner C. The distance AB=0.46 m (the other two sides of the triangle are the same).

    asked on March 24, 2013
  3. Physics

    A long coaxial cable consists of two concentric conductors. The inner conductor is a cylinder with radius R_1, and it carries a current I_0 uniformly distributed over its cross section. The outer conductor is a cylindrical shell with inner radius R_2 and

    asked on April 5, 2013
  4. Physics

    (a) In the diagram above the small semi-circle in the wire above R_1 indicates that it is not in contact with the horizontal wire which it appears to intersect due to the 2-dimensional projection. Additionally, the horizontal wire is continuous, not

    asked on April 5, 2013
  5. Physics

    A simple motor has N=250 turns of wire on a coil measuring 12 cm \times \, 4 cm. It's resistance is R=10 ohms. The magnetic field is B=1 T. (a) How much current (in Ampere) in the coil is needed to produce a maximum torque of 40 Nm? b) What maximum EMF (in

    asked on April 6, 2013
  6. Phys

    A car of mass 1200kg is moving on a road at the speed of 60km/hr.if coefficient of friction is 38, and Normal force is 50N. The frictional force acting on the car is given by

    asked on November 8, 2017
  7. Thermodynamics

    An insulated rigid tank contains 1.5 kg of helium at 30∘C and 500 kPa. A paddle wheel with a power rating of 0.1 kW is operated within the tank for 30 minutes. Cvof helium = 3.12 KJ/Kg.K Problem 7A. Calculate the net work done by helium, in kJ. Enter the

    asked on October 17, 2014
  8. Physics

    An electron is projected, with an initial speed of v= 2.18e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal

    asked on March 2, 2013
  9. Physics

    An object of mass m=80 kg moves in one dimension subject to the potential energy U(x)=λ/4*(x2−a2)2+(b/2*x2) a) How many equilibrium points (stable and unstable ones) does this potential have? b) Find a stable equilibrium point x0 such that x0 is

    asked on November 2, 2013
  10. Physics

    A woman weighs Fg= 600 N when standing on a stationary scale. Now, the woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 7 m/s to 1 m/s in a time interval of 1 s.

    asked on November 2, 2013
  11. PHYSICS

    a car traveling at a constant velocity of 30 m/sec passes an intersection at time t=0 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake

    asked on October 17, 2011
  12. Thermodynamics

    Steam in a cylinder-piston arrangement expands from an initial condition of 5 bar, 80% dry to a final state of 2 bar, dry saturated steam. The initial volume of steam is 0.8 m3. The process of expansion can be represented by a straight line on the

    asked on October 17, 2014
  13. Thermodynamics

    Consider 2 kg of an ideal gas (R=300 J/(kg.K) and Cp=1000 J/(kgK)) contained in a piston cylinder arrangement. The cylinder has a small valve at the end opposite to the piston.The cylinder walls are not adiabatic and allow heat transfer. The initial

    asked on October 17, 2014
  14. Physics

    An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position. The forces acting to stop the airliner arise from friction due to the wheels and from the breaking effort of the engines in

    asked on November 2, 2013
  15. Physics

    A body of mass m= 1 kg is moving along the x-axis. Its potential energy is given by the function U(x)=2*(x^2−1)^2 Suppose the body starts with zero speed at x=1.5 m. What is its speed (in m/s) at x=0 m and at x=−1 m? v(x=0)= v(x=−1)=

    asked on October 18, 2013
  16. Maths-Calculus

    If f(2)=1 and f(2+h)=(h+1)3, compute f′(2). If f(−1)=5 and f(−0.9)=5.2, estimate f′(−1). If the line y=−3x+2 is tangent to f(x) at x=−4, find f(−4). Your answer should be expressed as an integer. If the line y=x−1 is tangent to the graph

    asked on September 10, 2013
  17. Physics

    A spherical shell of radius R carries a uniform surface charge density (charge per unit area) \sigma. The center of the sphere is at the origin and the shell rotates with angular velocity \omega (in rad/sec) around the z-axis (z=0 at the origin). Seen from

    asked on April 26, 2013
  18. Physics

    A coil consists of N=10^5 turns of wire wrapped uniformly around a plastic torus. The inside radius of the torus is r0=0.15 m and the outer radius is r1=0.16 m. Thus, each winding has a diameter d=0.01 m. What is the self-inductance (in H) of this coil?

    asked on April 14, 2013
  19. Physics

    Consider the following circuit. We have R_1=7 Ohms, R_2=17 Ohms, R_3=11 Ohms, V=9 Volts, L=0.09 H. At t=0 the switch is closed. (a)Immediately after the switch is closed, what are currents I_1, I_2, I_3 ? I_1 (b)What are the three currents after the switch

    asked on April 14, 2013
  20. Physics

    Consider a capacitor made of two square plates of side 'l' . The distance between the two plates is 'd'. a) We insert a dielectric of dielectric constant K>1 and width l, a distance x (as in the diagram). What is the total capacitance of this arrangement?

    asked on March 12, 2013
  21. Maths

    Prove that the triangle formed by the points of contact of the sides of a given triangle with the excircles corresponding to those sides is equivalent to the triangle formed by the points of contact of the sides of the traingle with the inscribed circle

    asked on March 7, 2013
  22. physics

    Two conducting thin hollow cylinders are co-aligned. The inner cylinder has a radius R1 , the outer has a radius R2 . Calculate the electric potential difference V(R2)−V(R1) between the two cylinders. The inner cylinder has a surface charge density of

    asked on March 3, 2013
  23. Physics

    A block of mass m=2 kg on a horizontal surface is connected to a spring connected to a wall (see figure). The spring has a spring constant k= 12 N/m. The static friction coefficient between the block and the surface is μs= 0.5 , and the kinetic friction

    asked on November 2, 2013
  24. Physics

    In the following circuit R_1=3 Ohm, R_2=10 Ohm, C=0.003 Farad, V=5 Volts. At time t =0 we connect the power supply to the circuit. At t=0 the capacitor is uncharged. (a) What is the time constant tau (in seconds) to charge up the capacitor? (b) What is the

    asked on May 6, 2013
  25. Physics

    The equation describing the (r, \theta ) coordinates of points along a single field line of a magnetic dipole is r=R_0 \sin ^2(\theta ) where \theta =0 is in the direction of the dipole moment and R_0 is a constant which is different for each field line.

    asked on April 6, 2013
  26. physics

    A current I travels counterclockwise through a closed copper wire loop which has the shape of a rectangle with sides 'a' and 'b'. What is the magnitude of the magnetic field at the center, C, of the rectangle? Express your answer in terms of a, b, I and mu

    asked on March 30, 2013
  1. PHYSICS

    The pressure is 0.2526 atm

    posted on January 11, 2014
  2. PHYSICS(HELP)

    The pressure is 0.2526 atm

    posted on January 11, 2014
  3. Classical Mechanics Physics - Urgent help please

    Didn't get the solution for b) and c) of 1st problem, please help me

    posted on December 9, 2013
  4. Classical Mechanics Physics - Urgent help please

    BW please tell me solution for the 1st problem, my beta is 0.8 and mass is 3kg

    posted on December 9, 2013
  5. Classical Mechanics Physics - Urgent help please

    bw did u find f_y?

    posted on December 9, 2013
  6. Classical Mechanics Physics - Urgent help please

    Can someone please tell me the solution for b) part?

    posted on December 9, 2013
  7. Classical Mechanics Physics - Urgent help please

    I got c) part, the angle is 48.18 for all values

    posted on December 9, 2013
  8. Classical Mechanics - Need Help Please

    Please help me, my beta is 0.8 and mass is 3 kg, I got only the a) part correct, b) and c) are wrong :(

    posted on December 9, 2013
  9. physics

    How to calculate M initial and M final?

    posted on December 8, 2013
  10. Physics

    Yes, try it yourself, I got a green tick!

    posted on November 4, 2013
  11. Physics

    Yes yes, even I got the same result, but solved it a little differently

    posted on November 4, 2013
  12. Physics

    I think i have got how to work for t12, let me try first.

    posted on November 4, 2013
  13. Physics

    @ mouse, in the airliner's problem, what units do we have to keep? I converted kN to kg and tonnes to kg as well.

    posted on November 4, 2013
  14. Physics

    @ mouse, I read the airliner prob properly, I solved it but got it wrong. I am confused in the equations. Their equation is F(t)=-F0+Bt , whereas ours is F(t)=-F0+(t/ts-1)*F1. What is B? I have only 1 try left now :(

    posted on November 4, 2013
  15. Physics

    Thanks a lot mouse, I could solve the pendulum problem. But, in the mass spring problem, I got x1=0.5714 , so mod(x2-x1) should also be equal to x1, correct? But when i typed in the value, it showed that x1 was correct but mod(x2-x1) was wrong :( Also, I

    posted on November 3, 2013
  16. Physics

    ss01, can you please tell me the solution for the airliner problem?

    posted on November 3, 2013
  17. Physics

    Thanks a lot mouse and KS, Did anyone get the airliner and the pendulum problem?

    posted on November 3, 2013
  18. Physics

    @ KS, can you please tell me how you got the solution for Double Well potential? I am not getting the value for k.

    posted on November 3, 2013
  19. Physics

    Please help me mouse

    posted on November 3, 2013
  20. Physics

    Thats what I am not getting! My x0 is 2, so F(x)= F0-k(x-2), when i type this in taylor series calculator of wolframalpha, i get a huge equation!

    posted on November 3, 2013
  21. Physics

    Yes i got x0, but i didn;t get k, can you please tell me how to calculate k for those values?

    posted on November 3, 2013
  22. Physics

    @ mouse, my x_0 is 2, lambda is 5, a=4, b=60 and mass is 80kgs. Please tell me the value of K, i tried to solve it by your method, but i got it wrong.

    posted on November 3, 2013
  23. Physics(IMPORTANT)

    ss01, can you please tell me a,b,c parts?

    posted on November 3, 2013
  24. physics(help)

    I didn't get the 2nd part, If I plug in 50*10*cos(30) , i get the answer wrong.

    posted on November 3, 2013
  25. PHYSICS(HELP)

    And also for sliding down the dome's 2nd part

    posted on November 3, 2013
  26. PHYSICS(HELP)

    I need help for airliner and double well potential ( K=? T=? )

    posted on November 3, 2013
  27. Physics

    I couldn't understand part c. In wolframalpha, what do we have to enter as the order of the taylor series and the point?

    posted on November 3, 2013
  28. PHYSICS (HELP!!!)

    What about the remaining parts??

    posted on November 2, 2013
  29. PHYSICS(HELP)

    Yes, this method is not working

    posted on November 2, 2013
  30. PHYSICS(HELP)

    What is the distance here?

    posted on November 2, 2013
  31. physics (it's rather urgent help is appreciated

    Thanks. Did you get Stone On Roof Find Distance problem?

    posted on October 6, 2013
  32. physics (it's rather urgent help is appreciated

    Can you tell me how to calculate distance of the particle to the origin at time, speed of the particle and the smaller angle? I got the acceleration. Thanks

    posted on October 6, 2013
  33. physics (it's rather urgent help is appreciated

    Well, I don't know how to differentiate, can you explain it to me.

    posted on October 6, 2013
  34. physics (it's rather urgent help is appreciated

    I didn't get you, can you explain it properly how to do the 1st problem

    posted on October 6, 2013
  35. physics (it's rather urgent help is appreciated

    kyle and ss01 can you please tell me how to solve the 1st problem?

    posted on October 6, 2013
  36. physics (it's rather urgent help is appreciated

    Even I wanted to know how to solve this problem. Can any one tell me how to solve the first problem of the exam? I got the answers of all problems except these 2.

    posted on October 6, 2013
  37. Maths-Calculus

    Thanks, can you tell me the rest?

    posted on September 11, 2013
  38. Physics

    Q3, 3rd and 4th I=V/R

    posted on June 16, 2013
  39. Physics

    Thanks, can u tell me the solutions of 1,4,6,9,10,11,12?

    posted on June 15, 2013
  40. Physics

    P, these are the answers- 1.2133e-8 1.21845e-7

    posted on June 15, 2013
  41. Physics

    No i didn't get them yet, I'll tell you when i get those, can u tell me the solutions of 1,4,6,9,10,11,12?

    posted on June 15, 2013
  42. Physics

    What is di/dt ??

    posted on June 15, 2013
  43. Physics

    B=n*E_0/c wavelength= 2*pi*c/(n*omega) Direction -z and -y

    posted on June 15, 2013
  44. Physics

    I got 4th problem

    posted on June 15, 2013
  45. Physics

    No, do you have any idea for others problems?

    posted on June 15, 2013
  46. Physics

    b) 0

    posted on June 15, 2013
  47. Engineering

    6_2A= -t_0*x 6_2B= -t_0*(x^2-L^2)/(8*pi*G_0*R^4) 6_2C= -L^2*t_0/(8*pi*G_0*R^4) 6_2D= 5*t_0*L/(4*pi*R^3) 6_3= 8*psi*G*I_o/(L^2) i need 6_1B

    posted on June 11, 2013
  48. Physics/Mechanics

    anyone got the 2nd answer???

    posted on June 11, 2013
  49. physics please need help

    Period (P) = 1/F

    posted on June 1, 2013
  50. Physics

    Do you know 1st c) and d) ?? And 3rd problem??

    posted on May 25, 2013
  51. Physics

    Yeah, only c) worked for me

    posted on May 25, 2013
  52. Physics

    Are these the formulas for 2nd problem?

    posted on May 25, 2013
  53. Physics

    Flu, U is the voltage of the battery

    posted on May 25, 2013
  54. Physics

    And Flu, from where did you find out the answers for 3rd prob?? My grader isn't accepting the the answer which u told, can u please tell me the formula, or from where u found out the answer?

    posted on May 12, 2013
  55. Physics

    And can anyone tell me the answer of 1st (g)??

    posted on May 12, 2013
  56. Physics

    1st prob- c) 1.451e8 and 1.6711e8 d) 1.936e8 and 2.229e8 If you want answers of any other probs or formulas, please let me know

    posted on May 12, 2013
  57. Physics

    Thanks a lot Flu for the 4th prob 2nd prob- a) Wavelength= 2*pi/k Frequency= omega/(2*pi)

    posted on May 12, 2013
  58. Physics

    What are the answers when t=2.2e-16?? And do u have answers for the 4th question? Anonymous, I have the answers for the 1st and 2nd problems, can u tell me the specific questions for whom u want the answers

    posted on May 12, 2013
  59. Physics

    Any one for 2nd and 4th question all parts??

    posted on May 4, 2013
  60. Physics

    Thanks, and for the standing wave??

    posted on May 4, 2013
  61. Physics

    Standing Wave and Traveling Wave all parts please.

    posted on May 4, 2013
  62. Physics

    Standing Wave and Traveling Wave all parts please.

    posted on May 4, 2013
  63. Physics

    Yeah even i got it wrong, the formula itself is wrong

    posted on April 28, 2013
  64. Physics

    A=4*pi*r*r

    posted on April 28, 2013
  65. Physics

    Wrong formula!!!

    posted on April 28, 2013
  66. Physics

    That is a wrong formula, i m getting my answers wrong

    posted on April 28, 2013
  67. Physics

    How to calculate 'A'???

    posted on April 28, 2013
  68. Physics

    Thanks!! But how to calculate A in the first part??

    posted on April 27, 2013
  69. Physics

    a) (a) Calculate the magnitude of the total current (in A) carried by the rotating sphere for the following values of sigma,omega and R: sigma = 5 times 10^{-4},C/m^2, omega = 4 rad/sec and R = 1 m b)(b) Calculate the magnitude of the magnetic field B(z)

    posted on April 27, 2013
  70. physics

    A) 2.40*1.50=3.6J b) -0.600*1.50=-0.9 c) (1.50)cos90=0 d) same as c E) 3.6-0.9=2.7

    posted on April 18, 2013
  71. Physics

    I am not getting the answer by solving it. Can u please show the solution again?

    posted on April 16, 2013
  72. Physics

    Thanks

    posted on April 6, 2013
  73. Physics

    a) and c) are wrong

    posted on April 6, 2013