收获西瓜

  今天终于收获了西瓜,两个小的先尝了尝居然还有甜味,这两个小西瓜的种子都晾干,等来年再种。最大的西瓜当然要特别对待了,先去实验室称了质量,841.36克。又称了体积,西瓜密度小于水,悬浮时的排水量为V2-V1=2830-2000=830ml,完全浸入水中后排水量为V3-V1=3080-2000=1080ml,西瓜密度为:方法一,841.36g/1080ml=0.770g/(cm^3);方法二,1.00(g/cm^3)*(830ml/1080ml)=0.769g/(cm^3),误差为1.3%。西瓜密度小于水说明细胞间隙有很多空间,而且细胞器也有很多空间,虽然细胞质中溶有其他物质,密度大于水,但西瓜总体的空隙空间还是很多。

Advertisements
此条目发表在Uncategorized分类目录。将固定链接加入收藏夹。

发表评论

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / 更改 )

Twitter picture

You are commenting using your Twitter account. Log Out / 更改 )

Facebook photo

You are commenting using your Facebook account. Log Out / 更改 )

Google+ photo

You are commenting using your Google+ account. Log Out / 更改 )

Connecting to %s