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In this blog, using the HP 50g, I will show you how to get to the built in equation library and solve equations for

straight wire magnetism. The units for such is Tesla.

If you are required to answer in Gauss you will need to convert.

After turning on your HP 50g:

Press APPS

Scroll down to #12 or type in 12 (Equation Library)

PressOK.IfSoft Menumode is on you will see four boxes.Eqlib Colib Mes Utils. Choose EQLIB. This is for the equation library.

In the library there are many choices. Today we will exploreMagnetism. Go ahead and scroll down, pressENTER.

This brings us to today's topic.Straight Wire. PressENTER. You should now see the see the equation. The soft key choices are now

Solv Equ Vars Pic -->Stk Exit

PIC will show you a visual of the straight wire equation.

Vars gives a description of each variable that can be used in the equation.

EQN is the equation itself. The --> Stk puts the equation onto the stack.

The main soft key choice is Solv. This is the equation solver. To enter numerical information you must first key in the constant ex: 5_cm radius and 4_A current; -press 5 then press F2Bthe key directly under thersoft key menu, then 4 and F4Dfor current...soft key menuI.

Now to solve for B we must first press the White Right Shift key <-- and then F5E(B soft key menu)

Then solver should output the answer. Play around with different equations to get a feel for the powerful HP 50g!

How to graph a rose petal on the HP50g. Rose curve equations have two forms:

r = a cos(nθ) and

r = a sin(nθ)

where a ≠ 0 and n is a positive integer. Petals have length determined by a. If n is odd, the number of petals is n. However, if n is even, the number of petals is 2n.

The simplicity and symmetry of Rhodonea or rose curves have fascinated mathematicians since they were first named by the Italian mathematician Guido Grandi in the 1700s. We were fascinated by an interesting pattern created by counting the number of petals of these curves.

In mathematics, a rose or rhodonea curve is a sinusoid plotted in polar coordinates. This concept is studied in Precalculus or Calculus.

Students will understand the role of the values of a and n in the equation r = asin(nθ).

Students will be able to predict the number of petals and their length by examining the polar equation.

Student will understand the relationship between the equation of a rose curve and the equation of a sinusoidal function.