Consider the cell described below at 275 K: Sn | Sn2+ (0.845 M) || Pb2+ (0.937 M) | Pb Given EoPb2+→Pb = -0.131 V, EoSn2+→Sn = -0.143 V. Calculate the cell potential after the reaction has operated long enough for the Sn2+ to have changed by 0.359 mol/L.

Compute the maximum thrust density, power density and specific impulse for a 3-grided ion engine, having an acceleration voltage of 2000 V, and a voltage difference of 2500 V and a gap of 1.5 mm between the plasma and the first acceleration screens. Compute the propulsive parameters for the following propellants: xenon, argon, and molecular hydrogen.

A plane wave of frequency 900 MHz is and trave ling along -y direction with the electric field amplitude of 300 V/m (in vacuum). The value of electric field is -300 V at t=0 and y=0. Choose a magnetic field direction and define the polarization. Write the wave equation of the electric and magnetic field..

Vitaceae - detail description of species (plant), including flower, leaf stem, fruit, habitat, etc. Thank you.

Family: Vitaceae Species: Vitis labrusca L.

Common Name:fox grape

Family: Vitaceae Species: Vitis labrusca × V. riparia = V. ×novae-angliae Fernald

Common Name:New England grape

Recall that the Hoopoe birds are getting cancer because of the HCP retrovirus – take a look at the viral transforming gene, v-hcp compared to the c-hcp/mtk gene (above). (v-hcp lacks a ligand binding domain) Is a mAb therapy strategy likely to be useful in treating the virally-caused cancer? Briefly explain.

Use a dictionary to represent a directed graph in which each key is a pair (tuple) of two nodes, with the corresponding value set to the edge weight.

For example, W[u,v] =42.

Where in u → v.

Write a function to calculate the in and out degree of a given node.

What would be the advantages and disadvantages of this representation?

A graph G = (V, E) is a near-tree if it is connected and has at most n+ 8 edges, where n = |V |. Give an algorithm with running time O(n) that takes a near-tree G with costs on its edges, and returns a minimum spanning tree of G. Assume all the edge costs are distinct.