1) Maxwell the dog is trying to catch the cat, Shadow, using induction. He glues a strong magnet to Shadow’s collar, then puts a coil of wires consisting of 100 turns each with an area of 0.2m^2 next to some cat food. When Shadow walks through the coil, a current is induced in the loops which triggers a switch to drop a cage on Shadow. A minimum current of 0.2A is needed to spring the trap. The coils have a resistance of 120ohms. If the change in magnetic field is 0.3T in 0.2s as shadow walks through the coils, does the trap spring? If not, what can Maxwell do to fix his design? 2) Next Maxwell is trying to build an AC circuit to send a signal to a shock collar he put on Shadow while Shadow was sleeping. He has a 110Vrms source with variable frequencies. The circuit uses a 3mH inductor and 0.4mF capacitor. What frequency setting on the power supply will give the biggest power output of the circuit? Maxwell uses this frequency to drive the circuit, but misreads

What is the mass of the same rock on the earth

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field. it is in the opposite direction from that of the original external field. it has a direction determined entirely by the charge on its surface. it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0