magnetic, electric and gravitational fields - part 17 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 - 萬有引力場 個影片檔及 b 捲影像00:29
magnetic, electric and gravitational fields - part 15 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 - 萬有引力場 個影片檔及 b 捲影像00:35袋鼠
magnetic, electric and gravitational fields - part 13 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 - 萬有引力場 個影片檔及 b 捲影像00:32
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 - 萬有引力場 個影片檔及 b 捲影像00:24
if you could see the earth - part 16 of 16. a voyage into space, filmed completely in animation, reveals to the very young student the fact that the world is round and moves in orbit around the sun, causing day and night. sequences shot from a space ship - 萬有引力場 個影片檔及 b 捲影像00:30
if you could see the earth - part 14 of 16. a voyage into space, filmed completely in animation, reveals to the very young student the fact that the world is round and moves in orbit around the sun, causing day and night. sequences shot from a space ship - 萬有引力場 個影片檔及 b 捲影像00:28
if you could see the earth - part 13 of 16. a voyage into space, filmed completely in animation, reveals to the very young student the fact that the world is round and moves in orbit around the sun, causing day and night. sequences shot from a space ship - 萬有引力場 個影片檔及 b 捲影像00:30
if you could see the earth - part 12 of 16. a voyage into space, filmed completely in animation, reveals to the very young student the fact that the world is round and moves in orbit around the sun, causing day and night. sequences shot from a space ship - 萬有引力場 個影片檔及 b 捲影像00:36
if you could see the earth - part 7 of 16. a voyage into space, filmed completely in animation, reveals to the very young student the fact that the world is round and moves in orbit around the sun, causing day and night. sequences shot from a space ship s - 萬有引力場 個影片檔及 b 捲影像00:34
the two stereo spacecraft orbit the sun in orbits slightly different from the earth. - 萬有引力場 個影片檔及 b 捲影像00:48地球, 星球
alpine farmer whetting scythe, cutting hay, bundling it, toting it on sleigh, loading it onto cable car, and sending it down mountain slope, and... - 萬有引力場 個影片檔及 b 捲影像00:57
november 2004 cgi animation of gravity reacting to a mass expanding and exploding / united states - 萬有引力場 個影片檔及 b 捲影像00:12
boxes of food being packed for transport via a gravity runway / united kingdom - 萬有引力場 個影片檔及 b 捲影像00:28
slo mo, ms, studio shot of glowing light bulb falling and smashing against floor - 萬有引力場 個影片檔及 b 捲影像00:08
slo mo, cu, selective focus, studio shot of scoop of ice cream falling at woman's feet - 萬有引力場 個影片檔及 b 捲影像00:11
