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How can we excite the patch antenna in different modes like TM10 and TM30? If a microstrip patch antenna resonates at TM10 mode can it resonate in other modes also...
Asked on 01/15/2021 by Swap
1 answerToday, I learned that the kinetic energy of an object can be described by$$KE=gamma mc^2=frac{1}{sqrt{1-frac{v^2}{c^2}}}mc^2.$$ I have been taught in school that the kinetic energy of an object...
Asked on 01/15/2021
3 answerIn my thermodynamics/statistical mechanics book ("Concepts in thermal physics", Blundell), the temperature of a system A has been defined as being one over the derivative of the entropy of A...
Asked on 01/15/2021
2 answerWhat are they? How are they created?And what do they have to do with plasmons?I searched the web, but I would like more reliable and straightforward sources....
Asked on 01/15/2021 by user46147
2 answerThe heat equation is often written as $frac{partial T}{partial t} = frac{kappa}{c} nabla^2T$ where $kappa$ is the thermal conductivity and $c$ is a heat capacity per volume....
Asked on 01/15/2021
1 answerSince water molecules are dipoles and get excited by microwave radiation I wonder if the opposite is true and water can act as an electromagnetic emitter....
Asked on 01/15/2021
1 answerA little help/direction would be very helpful:The needle of a syringe has a diameter $d=0.6mm$ and its length is$l=2cm$. The water flow forced in the needle is...
Asked on 01/15/2021 by Daphoque
2 answerI'm reading Quantum Field Theory in Strongly Correlated Electronic Systems, Nagaosa. Consider 1D Ising model,$$H=J_zsum_i S^z_iS^z_{i+1}.$$on page 3, it saysThe groud stae is 2-fold degenerate because the...
Asked on 01/15/2021 by RicknJerry
1 answerFrom Maxwell's curl equations, obtain the particular differential equations for the case of$vec{J} = J_z(y,t)hat{z}$. The solution provided for this question shows something like this: $begin{vmatrix}vec{a_x}&vec{a_y}&vec{a_z}...
Asked on 01/15/2021 by SharonZh
1 answerAs per the Big Bang model of Cosmology roughly 13.8 billion years ago a singularity exploded exponentially to eventually become the present universe. At the present time (basically current time-slice)...
Asked on 01/15/2021 by self.grassmanian
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