音叉
音叉被用于观察声波和谐振. 它们提供了一个几乎是纯的谐波频率，可以用来作为参考，以检查示波器以及演示波物理.
下面是对eBay和亚马逊卖家的列表，提供低成本的音叉，适合在儿童科学实验.
| Ebay has returned a malformed xml response. This could be due to testing or a bug in the RSS2 Generator. Please check the support forums to see if there are any posts regarding recent RSS2 Generator bugs. No items matching the keyword phrase "tuning fork" were found. This could be due to the keyword phrase used, or could mean your server is unable to communicate with Ebays RSS2 Server. CURL error code = 28. (Operation timed out after 20001 milliseconds with 0 bytes received) |
成为第一个发表评论. 发表评论