Recent content by songminho

The first wire goes up the screen so magnetic field goes into the page. For net field to be zero, it should cancel out? so the 2nd wire also goes up the screen (magnetic field into screen? So the current in the second wire is 9.57A?

Would the magnitude be the same as wire 1? If they travel in same direction then they attract...?

Magnetic field into the screen so current is upwards? Not sure about the magnitude...

yes, that's how the question is worded :/ Is it the formula ? I tried using in the attempt above

Homework Statement Two parallel wires are positioned at l = 2.76 cm apart. Initially a current I1 = 9.57 A flows up the screen through wire 1, and wire 2 has no current in it. A current is then sent through wire 2. The magnetic field between the two wires, is found to be 0T. What is the size...

Homework Statement A power plant produces energy at a voltage of V = 15435 V. Before being sent along long distance power lines this electricity is sent through a transformer with 112 turns in the primary coil and 8613 turns in the secondary coil. If the wires have an efficiency of 99.60...

Homework Statement How would you calculate the length of a year in Earth years on a hypothetical planet? (given the mass + radius of the planet) I understand Kelper's law is used somehow, but is orbital velocity needed?

Does that mean λ = 14.5m?

Homework Statement A backyard pool is 14.5 m long. For fun Sally uses a board to create waves. Sally investigates the effect these waves have on Susan who is floating on another board near the middle of the pool. Sally notices that the waves travel with a speed 6.2 m/s. a) If Sally moves the...

Homework Statement A mass 2.74 kg is hung from a spring. The mass is pulled down a short distance and released, it oscillates with a frequency f = 1.972 Hz. What is the spring constant for the spring? Homework Equations f=1/2pi*sqrt(k/m) The Attempt at a Solution 1.972 = 1/2pi*sqrt(k/2.74)...