What powers 
physics.info?
Last seen Sep 2026 · 13 technologies across 9 categories
Analytics
CDN
Ecommerce
JavaScript libraries
Miscellaneous
Security
Web servers
Webmail
Widgets
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| systeme international | #2 | 5,400 |
| physics equations | #1 | 3,000 |
| physics formulas | #1 | 2,000 |
| m/s in physics | #5 | 1,600 |
| british units | #4 | 1,500 |
| ke formula | #6 | 1,100 |
| physics symbols | #1 | 1,100 |
| velocity eq | #4 | 980 |
| acceleration equation | #3 | 960 |
| law of conservation of momentum equation | #1 | 880 |
| refraction | #8 | 800 |
| acceleration formula | #8 | 800 |
| kinematic eq | #13 | 800 |
| motion formula | #2 | 660 |
| centripetal force and acceleration | #4 | 650 |
| ke energy formula | #8 | 650 |
| viscosity | #11 | 620 |
| velocity formula | #9 | 610 |
| quantum chromodynamics | #4 | 600 |
| final velocity formula | #2 | 580 |
| planck black body radiation | #2 | 540 |
| standard model of particle physics | #4 | 530 |
| power equation | #6 | 500 |
| science symbols | #3 | 480 |
| kinematics formulas | #16 | 440 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 55% desktop
- 41% phone
- 4% tablet
United States
India
Canada
United Kingdom
Australia
Indonesia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.06 / 10 · ranked #241,076 of all domains
226 referring domains · OpenPageRank
Search traffic
66,700 est. monthly organic visits (US)
15,775 keywords in Google's top 30
Core Web Vitals
| LCP | 1.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 0.8 MB · 35 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- hypertextbook
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Cloudflare (104.21.14.104, IPv6)
- Email: iCloud Mail
- Email security: no SPF record, no DMARC record
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Nov 2026
- Common Crawl link graph: rank 30,015, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| physics.info | 11 |
| www.physics.info | 4 |
Full technology history →
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Recent changes
- dropped ShareThis Mar 2026