Question 4:
Calculate the magnetic field of a disc of radius \( R \) with uniform surface charge density \( \sigma \), rotating about its axis at an angular velocity \( \omega \).
How about the magnetic field of a solid sphere of radius \( R \) with a uniform volume charge density \( \rho \), spinning at angular frequency \( \omega \) ? Please give your answers for the inner and outer region of the sphere.
Isolating a variable in two equations is easiest when one of them has a coefficient of 1. Let's say we have the two equations
3A−B=53A−B=5
2A+3B=−42A+3B=−4
and want to isolate one of the variables, such that it appears by itself on one side of the equation. Which of the following is an equation with one of the above variables isolated?
View Available Hint(s)for Part A
B=3A−5B=3A−53B=−2A−43B=−2A−4B=5−3AB=5−3A2A=−3B−42A=−3B−4
For the following galvanic cells;(1) Indicate the direction of electron transfer (flow).(2) State which electrode will act as the anode or the cathode.(3) Write the relevant electrochemical reactions .VIron Copper0.5 M NaCl0.5 M NaClCell (1)+
A sluice gate consisting of a quadrant of a circle is ,as shown in figure, used to stop the sea water. Calculate the magnitude and direction of the resultant force(Fr) on the gate due to sea water of specific gravity 1.025 and the turning moment required to open the gate. The width of the gate is 4m and it has a mass of 8000 kg
What is the amount of the payments that Alan Winslow must make at the end of each of 8 years to accumulate a fund of $91,000 by the end of the 8th year, if the fund earns 8% interest, compounded annually?
Microbial media can be classified as which of the following physical states? More than one answer may be correct.
Multiple select question.
acidic
complex
liquid
semisolid
solid
