Recent content by zapped

  1. Z

    Solving When Boats Were Closest Together

    1. Homework Statement A boat leave a dock at noon and heads weat at a speed 25km/h. Another boat heads north at 20km/h and reaches the same dock at 1:00 pm. when were the boats closest to each other? 2. Homework Equations when were the boats closest to each other? 3. The Attempt...
  2. Z

    When were the boats closest to each other?

    Homework Statement A boat leave a dock at noon and heads weat at a speed 25km/h. Another boat heads north at 20km/h and reaches the same dock at 1:00 pm. when were the boats closest to each other? Homework Equations when were the boats closest to each other? The Attempt at a...
  3. Z

    NO 2 OBJECTS WILL EVER really TOUCH?

    [b] NO 2 OBJECTS WILL EVER really TOUCH? 1. Homework Statement When an object is placed on table, the particles in the object and the particles in the table never actually touch. 2. Homework Equations In a short paragraph, explain how the field model can be used to explain why the...
  4. Z

    Two objects will never actually touch

    anyone can help me?
  5. Z

    Two objects will never actually touch

    Homework Statement When an object is placed on table, the particles in the object and the particles in the table never actually touch. Homework Equations In a short paragraph, explain how the field model can be used to explain why the particles never touch. Refer to the strengths of the...
  6. Z

    Building a water heater- using battery and wire

    thanks everyone I was just unsure about the length of the wire I got but I get it now =P
  7. Z

    Building a water heater- using battery and wire

    Homework Statement Need to heat 30mL of water from 20C to 40C in 1 min(60s). Using 6V battery and Nickel Chromium alloy Nichrome wire that has a resistivityabout 10^-6 ohms/meter. So you use the battery and the wire to build a water heater. Batter has no internal resistance. Homework...
  8. Z

    What is the Resistance of Your Calculator?

    thank you so much =P
  9. Z

    What is the Resistance of Your Calculator?

    Homework Statement a battery delivers nearly constant voltage of 1.5 V and stores about 10^4 joule of energy. Homework Equations From time it takes you to use up the batteries in your calculator estimate the resistance of your calculator. The Attempt at a Solution I really don't...
  10. Z

    Magnet and Charge: Rotation Direction?

    Homework Statement a bar of magnet is hung from a string through its center. A charged rod is slowly brought up into the positions shown(down) in what direstion will the magnet tend to rotate? Suppose the charged rod were replaced by a bar magnet with the north pole on top. N magnet...
  11. Z

    You can NOT solve this Problem, however please give it a try

    I think the mass will be an external force to the moving object therefore it will undergo acceleration so I think tilt is more reasonable than stay the same
  12. Z

    Magnet Movement When Charged Rod or Bar Magnet is Brought Near

    Homework Statement a bar of magnet is hung from a string through its center. A charged rod is slowly brought up into the positions shown(down) in what direstion will the magnet tend to rotate? Suppose the charged rod were replaced by a bar magnet with the north pole on top. N magnet...