# Recent content by Loppyfoot

1. ### Better Thermal Insulator for Glass - Neoprene or Silicone?

I am looking to improve the thermal insulation on one of my favorite glass mugs. I am choosing between a silicone glove or a neoprene wrap. What is the difference between a silicone baking mat and silicone rubber? Does silicone or neoprene have better thermal insulation?
2. ### Does an Induction Cooking Pan Need to be Completely Ferrous?

Do you think that a ferrous plate at the bottom would suffice though? Or would a completely ferrous pan be significantly better?
3. ### Does an Induction Cooking Pan Need to be Completely Ferrous?

I ask, "Does a ferrous pan for Induction Cooking need to be Completely Ferrous?" In other words, could just the bottom of the pan be a ferrous material for good inductive heat induction? Could I have a ferrous bottom, and ferrous sides that turn to a non-ferrous material after a couple...
4. ### Question on Surface Integral and Flux

Could I use, (3,-1,0)x(0,0,-1)?
5. ### Question on Surface Integral and Flux

Alright, so the corss product of two vectors will give me a vector that is perpendicular to the plane (which is in the direction that I want). I'm not sure what these vectors would be? How do I know what vectors to cross?
6. ### Question on Surface Integral and Flux

Would I compare triangles in the xy-plane?
7. ### Question on Surface Integral and Flux

Homework Statement I have a coordinate system, (x,y,z). There is a uniform-magnetic-field of 2.0 T that exists along the direction of the y-axis. There is a rectangular plane bounded by the points (3,0,0),(0,1,0),(0,1,1),(3,0,1). Calculate how much flux is traveling through the rectangular...
8. ### Finding Omega and Zeta from a Magnitude and Phase Plot

Yes, I am assuming that the AFM cantilever is being modeled as a second order system. With the cantilever tune, the phase curve is set to 90° of the resonant frequency. So would I be close enough in estimating that the natural frequency is 72.7 kHz?
9. ### Finding Omega and Zeta from a Magnitude and Phase Plot

I was able to calculate the value for the damping ratio; but I am having trouble finding the value of the natural frequency. Any ideas on how to solve for the natural frequency?
10. ### Finding Omega and Zeta from a Magnitude and Phase Plot

Could you elaborate? Where does this -3dB bandwidth come from? Is Q inversely related to the damping ratio, ζ? Thanks for your help.
11. ### Finding Omega and Zeta from a Magnitude and Phase Plot

Homework Statement I've been asked to estimate ωn and ζ from the magnitude and phase plot of an atomic force microscope. The magnitude and phase plot is attached. Does anyone know how to solve for these values?
12. ### Calculating Transformer Input Voltage?

The load is 1.5Ω, and Xm is also in Ω.
13. ### Calculating Transformer Input Voltage?

Homework Statement A 2400/240-V, 60-Hz transformer has the following parameters in the equivalent circuit of Figure 6.5: the high-side leakage impedance is (1.2+j2.0)Ω, the low-side leakage impedance is (0.012+j.02)Ω, and Xm at the high-side is 1800 . Neglect Rhe. Calculate the input voltage...
14. ### Electric Potential Question

Homework Statement Which of the following statements about the electric potential inside a metal object are correct? Check all that apply. The potential at any point inside a metal at equilibrium is equal to the potential at the surface, which may be nonzero. The potential is the same...
15. ### Which of the following

Which of the following.... Homework Statement In a collision between an electron and a hydrogen atom, it is useful to select both objects as the system because: A. The total momentum of the system does not change during the collision B. The forces the objects exert on each other are...