understanding magnetic fields with a bar magnet and iron filings demonstration. 3d animation - 鐵碎 個影片檔及 b 捲影像00:10
two liquids interacting to sound vibration, orange patterns on black bg, vs iron filings standing , moving as group, some clusters standing taller,... - 鐵碎 個影片檔及 b 捲影像00:34
muscle: chemistry of contraction - part 25 of 26. what part of the muscle contracts and what triggers the contraction? with the aid of an electron microscope and a simple tabletop model of muscle filaments, dr. georges r. marchal, universit de louvan, - 鐵碎 個影片檔及 b 捲影像00:26人體構造
muscle: chemistry of contraction - part 24 of 26. what part of the muscle contracts and what triggers the contraction? with the aid of an electron microscope and a simple tabletop model of muscle filaments, dr. georges r. marchal, universit de louvan, - 鐵碎 個影片檔及 b 捲影像00:28人體構造
magnetic, electric and gravitational fields - part 5 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic r - 鐵碎 個影片檔及 b 捲影像00:32
magnetic, electric and gravitational fields - part 4 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic r - 鐵碎 個影片檔及 b 捲影像00:35
magnetic, electric and gravitational fields - part 3 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic r - 鐵碎 個影片檔及 b 捲影像00:29
magnetic, electric and gravitational fields - part 2 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic r - 鐵碎 個影片檔及 b 捲影像00:25
magnetic, electric and gravitational fields - part 1 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic r - 鐵碎 個影片檔及 b 捲影像00:24
