Past papers and mark schemes for Edexcel Chemistry International A-level Unit 2 (WCH1/WCH0/6CH0)
Loved their on-screen tests. Literally so convenient. I would have never practised as many past papers otherwise. Go for it people. On-screen tests are free!!! 😊 (although I was a premium user!) IGCSE PAST PAPERS 2020 NOW AVAILABLE ...
The selection of a piezoelectric material for a piezoelectric harvester is definitely influenced by the operating conditions, which makes the choice of a piezoelectric material more difficult. Table 1 shows the key insights of recent review papers on piezoelectric energy harvesting materials. Table 1. ...
The selection of a piezoelectric material for a piezoelectric harvester is definitely influenced by the operating conditions, which makes the choice of a piezoelectric material more difficult. Table 1 shows the key insights of recent review papers on piezoelectric energy harvesting materials. Table 1. ...
Often, the result is a red shift of the band-gap transition and a modulation of the semiconductor Fermi level. Furthermore, these new energy levels can alter the charge carrier equilibrium concentration by serving as electron-hole trapping centres, potentially suppressing charge carrier recombination ...
All four femora can be assigned a Histologic Index of 5 ("unaltered") according to the scale of Hedges et al. [85]. Osteons and osteocyte lacunae remained clearly visible in the thin section of each specimen. No bone sections exhibited any unequivocal evidence of microbial attack (i.e., ...