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  1. K

    First order RC Circuit Table problem

    I understand but thats what it said... complete table 1.
  2. K

    First order RC Circuit Table problem

    I understand but thats what it said... complete table 1.
  3. K

    First order RC Circuit Table problem

    Homework Statement Hi I got this problem and have to fill out this table. Homework Equations node analysis time constant = RC ic(t)= C dVc(t)/dt The Attempt at a Solution I got few answers which i worked it out. i (0-) = 0 Vc(0-) = 1.84 Vr(0-) = i (0-) *...
  4. K

    Thermodynamics !

    Homework Statement A stove burner supplies heat to a pan at the rate of 1500 W. How long will it take to boil away 1.1 kg of water, once the water reaches its boiling point? Homework Equations q = mct The Attempt at a Solution heat transfer = 1500 W, m = 1.1 KG Tf = 100 [
  5. K

    Find the tension in the horizontal cable that supports the boom

    Homework Statement A crane in a marble quarry is mounted on the rock walls of the quarry and is supporting a 2000 kg slab of marble as shown in the figure. The center of mass of the 900 kg boom is located one-third of the way from the pivot end of its 15-m length, as shown. Given...
  6. K

    Torque Problem Static equilibrium

    ohh crapp i have to use distance from pivot which is 3 right ??
  7. K

    Torque Problem Static equilibrium

    Homework Statement Homework Equations How to do this question ?? The Attempt at a Solution I know sum of torque and force = 0 at fapplied i got torque = 25sin(45) * 3.8m = 67.18N .. But dont know what to do next !!!
  8. K

    Other Force problem

    Cause... thats where i was gettin tricked.
  9. K

    Other Force problem

    Ok how do you know thats total vector ?
  10. K

    Other Force problem

    Other Force problem !!! Homework Statement Two forces act on a 3.1 kg mass, which undergoes acceleration a = 0.88 i - 0.28 j m/s2. If one of the forces is F1 = - 1.5 i - 3.0 j N, what is the other force? Homework Equations I don't know how to visualize this !!!! The Attempt at a...
  11. K

    Why period is half ? Spring problem

    Yes BASIC But how ? And I know when max displacement the T is gonna be 1.
  12. K

    Why period is half ? Spring problem

    Homework Statement A mass m slides along a frictionless horizontal surface at speed v initial. It strikes a spring of constant k attached to a rigid wall. After a completely elastic encounter with the spring, the mass heads back in the direction it came from. (a)In terms of k, m, and v...
  13. K

    How to Take the sum of moments

    Yes, the centre of mass at mid weight and pivot at p.
  14. K

    How to Take the sum of moments

    How to Take the sum of moments !!! Homework Statement Hi i am doing static equilibrium exercises in textbook. Homework Equations But I dont know how to find sum of moments at P when its come to angle. This is a drawing The Attempt at a Solution I have No idea !!! I was...
  15. K

    Aluminium Block immersed in water beaker

    Homework Statement physical reasons for the relationship between weight change(100CC beaker with water and when you dip aluminum block in water ) and apparent loss in weight of the aluminium (Aluminium block weight using spring balance and when that block immersed in water) Homework...
  16. K

    Surface Area frictional force

    Homework Statement does surface area to affect the values of coefficient µk? Homework Equations frictional force =µk * normal force The Attempt at a Solution I know that if mass is larger then the frictional force is higher( f= ma) but how about the surface area? does it affect...
  17. K

    Find i(t)

    Homework Statement [Broken] Homework Equations impedence diagram, XL = ωL The Attempt at a Solution Ok i got XL = 47 ohm Then my phase angle is 88.8 degree. Then to find i(t) i have to add that angle to the function right?
  18. K

    How? Which Trig Identityis that?

    Awaks.. IT is solution of the Electrical Engineer : priniciples and application Hambley book. And they made it wrong. I asked the question though i was wrong.
  19. K

    How? Which Trig Identityis that?

    but there is no sin..
  20. K

    How? Which Trig Identityis that?

    How?? Which Trig Identityis that? Homework Statement [Broken] Homework Equations The Attempt at a Solution sin^2 = 1- cos^2 ??
  21. K

    Impedance Problem

    isnt it Xc = 1/ angular freq.* C ??
  22. K

    Impedance Problem

    Homework Statement A circuit consists of a 50nF capacitor in series with a 47kΩ resistor. An AC voltage of 120Vrms at 350Hz is applied to the circuit. (a) Determine the current flowing through the circuit. (b) Sketch the impedance diagram for the circuit at this frequency. Homework...
  23. K

    Confusion RLC circuit

    Nice !!! thanks for all the help !!
  24. K

    Confusion RLC circuit

    gotchya for 1 ms liner becomes flat and than flat becomes no gradient follow on right?
  25. K

    Confusion RLC circuit

    Yeah i solve the question but i forget how i did it and why is like that !!??? :(:cry:
  26. K

    Confusion RLC circuit

    so it will be this graph right because di/dt is derivitve !!! [Broken]
  27. K

    Confusion RLC circuit

    I know deal with resistor but i have no clue about inductor
  28. K

    RLC circuit

    [Broken] This is my question 1. and this is my question 2. in a RLC series circuit show above are replaced following : R=500Ω L=0.4mH and C=100pF the circuit is connected to the terminals of an ac source with an rms voltage of 1V, and a variable frequency calculate the following A)...
  29. K

    Confusion RLC circuit

    [Broken] Got it right?
  30. K

    Confusion RLC circuit

    yeah i know its time dependency .. this is the graph for voltage in inductor vs time in ms [Broken]
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