As part of her invalid proofs assignment, Tammy designed a fallacious proof of 1 = 3. Her steps are shown.
Proof 1=3
Step 1:
2=2
Step 2:
2=2+2-2
Step 3: (8-6)= 4 -(8-6)
(8-6) (8-6)
Step 4:
(
8-6) (
8-6)
Step 5:
1 = 4-1
Therefore 1 = 3
Tammy has looked at her work but has forgotten where she purposely made the error.
Use the space beside her invalid proof to explain the error in reasoning.

Work = force × a. work b. energy c. distance d. momentum

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.