ÌâÄ¿ÄÚÈÝ
3£®£¨1£©ÔÚ¡°ÑéÖ¤»úеÄÜÊغ㶨ÂÉ¡±ÊµÑéÖУ¬ÏÂÁÐÆ÷²ÄÖв»±ØÒªµÄÊÇC£¨Ö»ÐèÌî×Öĸ´úºÅ£©A£®ÖØÎï B£®Ö½´ø C£®Ììƽ D£®¿Ì¶È³ß
£¨2£©Èç¹ûÒÔ$\frac{v^2}{2}$Ϊ×ÝÖá¡¢ÒÔhΪºáÖᣬ¸ù¾ÝʵÑéÊý¾Ý»æ³öµÄ$\frac{v^2}{2}$-hͼÏßÊǹýÔµãµÄÇãбֱÏߣ¬¸ÃµãµÄбÂʵÈÓÚg£®
£¨3£©Ä³Í¬Ñ§ÔÚ¡°ÑéÖ¤»úеÄÜÊغ㶨ÂÉ¡±ÊµÑéÖеõ½ÁËÈçͼËùʾµÄÒ»ÌõÖ½´ø£¬Í¼ÖÐOµãΪ´òµã¼ÆʱÆ÷´òϵĵÚÒ»µã£¬¿ÉÒÔ¿´×öÖØÎïÔ˶¯µÄÆðµã£¬´ÓºóÃæijµãÆðÈ¡Á¬Ðø´òϵÄÈý¸öµãA¡¢B¡¢C£®¼ºÖªÏàÁÚÁ½µã¼äµÄʱ¼ä¼ä¸ôΪ0.02s£¬¼ÙÉèÖØÎïµÄÖÊÁ¿Îª1.00kg£¬Ôò´ÓÆðµãOµ½´òÏÂBµãµÄ¹ý³ÌÖУ¬ÖØÎﶯÄܵÄÔö¼ÓÁ¿¡÷Ek=1.84J£¬ÖØÁ¦ÊÆÄܵļõСÁ¿¡÷EP=1.88J£®£¨±£ÁôÈýλÓÐЧÊý×Ö£¬ÖØÁ¦¼ÓËÙ¶ÈgÈ¡9.80m/s2£©µÃ³öµÄʵÑé½áÂÛÊÇÔÚÎó²îÔÊÐíµÄ·¶Î§ÄÚ£¬»úеÄÜÊغ㣮
·ÖÎö £¨1£©¸ù¾ÝʵÑéµÄÔÀíÈ·¶¨ËùÐè²âÁ¿µÄÎïÀíÁ¿£¬´Ó¶øÈ·¶¨ËùÐèµÄÆ÷²Ä£®
£¨2£©¸ù¾Ý»úеÄÜÊغ㶨Âɵóö$\frac{{v}^{2}}{2}$-hµÄ¹Øϵʽ£¬´Ó¶øµÃ³öͼÏßµÄÐÎ×´£¬µÃ³öбÂʵĺ¬Ò壮
£¨3£©¸ù¾ÝϽµµÄ¸ß¶ÈÇó³öÖØÁ¦ÊÆÄܵļõСÁ¿£¬¸ù¾Ýij¶Îʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËÙ¶ÈÇó³öBµãµÄËٶȣ¬´Ó¶øµÃ³ö¶¯ÄܵÄÔö¼ÓÁ¿£¬Í¨¹ý±È½ÏµÃ³öʵÑéµÄ½áÂÛ£®
½â´ð ½â£º£¨1£©ÊµÑéÖÐÑéÖ¤¶¯ÄܵÄÔö¼ÓÁ¿ºÍÖØÁ¦ÊÆÄܵļõСÁ¿ÊÇ·ñÏàµÈ£¬ÖÊÁ¿¿ÉÒÔԼȥ£¬²»ÐèÒª²âÁ¿ÖÊÁ¿£¬Ôò²»ÐèÒªÌìƽ£¬¹ÊÑ¡£ºC£®
£¨2£©¸ù¾Ý»úеÄÜÊغãµÃ£º$mgh=\frac{1}{2}m{v}^{2}$
½âµÃ£º$\frac{1}{2}{v}^{2}=gh$
Ôò$\frac{v^2}{2}$-hͼÏßÊǹýÔµãµÄÇãбֱÏߣ¬Í¼ÏßµÄбÂÊΪg£®
£¨3£©BµãµÄ˲ʱËÙ¶ÈΪ£º${v}_{B}=\frac{{x}_{AC}}{2T}=\frac{0.2323-0.1555}{0.04}m/s$=1.92m/s
Ôò¶¯ÄܵÄÔö¼ÓÁ¿Îª£º$¡÷{E}_{k}=\frac{1}{2}m{{v}_{B}}^{2}=\frac{1}{2}¡Á1¡Á1.9{2}^{2}$¡Ö1.84J
ÖØÁ¦ÊÆÄܵļõСÁ¿Îª£º¡÷Ep=mgh=1¡Á9.8¡Á0.192J¡Ö1.88J£®
¿ÉÖªÔÚÎó²îÔÊÐíµÄ·¶Î§ÄÚ£¬»úеÄÜÊغ㣮
¹Ê´ð°¸Îª£º£¨1£©C£»£¨2£©¹ýÔµãµÄÇãбֱÏߣ» g £¨3£©1.84£»1.88£»ÔÚÎó²îÔÊÐíµÄ·¶Î§ÄÚ£¬»úеÄÜÊغ㣮
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÖªµÀʵÑéµÄÔÀí£¬ÕÆÎÕÖ½´øµÄ´¦Àí·½·¨£¬»á¸ù¾ÝÖ½´øÇó½â˲ʱËٶȣ¬´Ó¶øµÃ³ö¶¯ÄܵÄÔö¼ÓÁ¿£¬»á¸ù¾ÝϽµµÄ¸ß¶ÈÇó½âÖØÁ¦ÊÆÄܵļõСÁ¿£®
A£® | ${\;}_{1}^{2}$H+${\;}_{1}^{3}$H¡ú${\;}_{2}^{4}$He+${\;}_{0}^{1}$nÊÇÇáºË¾Û±ä | |
B£® | X+${\;}_{7}^{14}$N¡ú${\;}_{8}^{17}$O+${\;}_{1}^{1}$HÖУ¬X±íʾ${\;}_{2}^{3}$He | |
C£® | ¦ÂË¥±äÖвúÉúµÄ¦ÂÉäÏßʵ¼ÊÉÏÊÇÔ×ӵĺËÍâµç×ÓÕõÍÑÔ×Ӻ˵ÄÊø¸¿¶øÐÎ³ÉµÄ | |
D£® | ${\;}_{90}^{232}$ThË¥±ä³É${\;}_{82}^{208}$PbÒª¾¹ý6´Î¦ÁË¥±äºÍ4´Î¦ÂË¥±ä |
A£® | Êܵ½µÄ³åÁ¿´ó | B£® | ¶¯Á¿±ä»¯¿ì | C£® | ¶¯Á¿±ä»¯Á¿´ó | D£® | Êܵ½µÄ³åÁ¿Ð¡ |
A£® | ÎüÊոùâ×Óºó±»µçÀ룬µçÀëºóµç×ӵĶ¯ÄÜΪ0.36eV | |
B£® | ²»»áÎüÊÕÕâ¸ö¹â×Ó | |
C£® | ÎüÊոùâ×Óºó±»µçÀ룬µçÀëºóµç×ӵĶ¯ÄÜΪÁã | |
D£® | ÎüÊոùâ×Ӻ󲻻ᱻµçÀë |
A£® | ¹âµçЧӦºÍ¿µÆÕ¶ÙЧӦ¶¼ËµÃ÷¹â¾ßÓÐÁ£×ÓÐÔ | |
B£® | ¶Ô¼«ÉÙÊýµÄ¼¸¸öÔ×ÓºËÀ´Ëµ°ëË¥ÆÚûÓÐÈκÎ×÷Óà | |
C£® | ¬ɪ¸£Í¨¹ý¦ÁÁ£×ÓÉ¢ÉäʵÑéÌá³öÁ˺Ëʽ½á¹¹ | |
D£® | ¹âµçЧӦÖйâµç×ÓµÄ×î´ó¶¯ÄÜÖ»ºÍÈëÉä¹âƵÂÊÓÐ¹Ø |
A£® | Ö»ÔÚÖØÁ¦×÷ÓÃÏÂ×öÇúÏßÔ˶¯µÄÎïÌå | |
B£® | ÎïÌåÑØ×Å´Ö²ÚбÃæÔÈËÙÏ»¬ | |
C£® | ÌøÉ¡Ô˶¯Ô±´ø×ÅÕÅ¿ªµÄÉ¡ÔÚ¿ÕÖÐÔÈËÙϽµ | |
D£® | ÓÃϸÉþË©×ÅÒ»¸öСÇò£¬Ð¡ÇòÔڹ⻬ˮƽÃæÄÚ×öÔÈËÙÔ²ÖÜÔ˶¯ |
A£® | À×´ïÎÀÐǵÄÏßËÙ¶ÈÊǶ¯Á¦»·¾³ÎÀÐÇÏßËٶȵÄ$\frac{1}{n}$ | |
B£® | À×´ïÎÀÐÇÓ붯Á¦»·¾³ÎÀÐǵÄÏòÐļÓËٶȱÈ$\frac{1}{{n}^{2}}$ | |
C£® | ÔÚÏàͬʱ¼äÄÚ£¬À×´ïÎÀÐÇÓ붯Á¦»·¾³ÎÀÐǸ÷×ÔÓëµØÐĵÄÁ¬Ïßɨ¹ýµÄÃæ»ýÏàµÈ | |
D£® | À×´ïÎÀÐÇÓ붯Á¦»·¾³ÎÀÐǵĽÇËÙ¶ÈÖ®±È$\frac{1}{{n}^{3}}$ |
A£® | m=0.5kg£¬v=2m/s | B£® | m=0.5kg£¬v=1.75m/s | ||
C£® | m=0.35kg£¬v=2m/s | D£® | m=0.35kg£¬v=1.75m/s |