Problem 8 i estimate that the gauss gun (a solenoid) is wound with 500 turns over a distance of 15cm with an average radius of 1.5cm. the peak current is about 300a. calculate the energy stored in the gauss’ gun at peak current. use the infinite solenoid approximation. select one of the following: (a) 70j (b) 0.01j (c) 200j (d) 6000j (e) 0.3j

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.