Recent content by CynicalBiochemist

  1. C

    Energy dissipated by resistor problem

    Thanks Doc. I am starting to understand why their approach works for computing energy. But let's say they asked for the power generated by the resistor for the 5 second interval. Would the answer then be P=120J/3s= 40W ? I.e., can we again neglect that 2 second segment where no energy was...
  2. C

    Energy dissipated by resistor problem

    Homework Statement A 10 Ω resistor carries a current that varies as a function of time as shown. How much energy has been dissipated by the resistor after 5 s? a. 40 J b. 50 J c. 80 J d. 120 J Homework Equations I=dq/dt → dq=Idt → Q=∫Idt P=∇E/∇t and V=IR (Ohm's Law) so P=IV ⇒...
  3. C

    Buoyancy of Balls A and B in a Swimming Pool

    Homework Statement Balls A and B of equal mass are floating in a swimming pool, as shown below. Which will produce a greater buoyant force? a. Ball A b. Ball B c. Force will be equal d. Impossible to determine without knowing the volume of each ball In the picture given, it is clear that...