Consider the following student statement: "If a system has no free charge, there can be no displacement field because the displacement field is directly proportional to free charge." Required:
a. What equation involving the displacement field is the basis for the explanation in this student statement?
b. Do you agree with this statement? Explain why or why not.

The key to stability is feedback between the reservoir and the fluxes into and/or out of the reservoir. assume that the rate of outflow from a reservoir depends on the size of the reservoir according to the following relationship: outflow rate= k x (size of reservoir), where k is a constant. a reservoir of water has a volume of 5000 liters, and the rate of outflow at steady state is 25 liters per minute. what is k? (give both the numerical value and its units.) what is the residence time? what is the relationship between k and the residence time?

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?