Q1. A 21-cm-long, zero-resistance wire is pulled outward, on zero-resistance rails, at a steady speed of 1.0 in a 0.10 magnetic field. On opposed side, a 1.0 carbon resistor completes the circuit by connecting the two rails. The mass of the resistor is 57. How much does the temperature of the carbon increase if the wire is pulled for 10? The exact heat of carbon is 710.
Q2. A particular organ pipe can resonate at 231 Hz, 385 Hz, and 539 Hz, but not at any other frequencies in between. Is it an open or a closed pipe? What is the fundamental frequency of this pipe?