1.3K posts analyzed Updated Sep 2026
Averages 42 posts/day, top 5% activity. Most active Tuesdays around 11 AM UTC. Mostly text posts (92%).
r/AskPhysics Traffic & Engagement r/AskPhysics Traffic & Engagement
Volume and engagement over time Posting volume and engagement over time
Post Format
Upvote Distribution
How upvoted posts perform Only posts with 2+ upvotes. The bands below show how those posts are spread by upvote count.
r/AskPhysics Most Active Times When r/AskPhysics Is Most Active
Peak posting by day and hour (UTC) When this community posts most, by day and hour (UTC)
Most Active by Day
r/AskPhysics Flair Performance r/AskPhysics Flair Performance
Upvotes and volume by flair Average upvotes and post volume by flair
This subreddit doesn't use post flairs.
No flaired posts were found in this month's data.
Post Type Breakdown
Share by text, image, or link Share of posts by format: text, image, or link
r/AskPhysics Trending Keywords Trending Keywords in r/AskPhysics
Ranked by how often they appear Title keywords ranked by how often they appear
| Keyword | Mentions ▼ | Upvotes | Comments |
|---|---|---|---|
| physics | 150 (11.8%) | 4 | 13 |
| time | 106 (8.3%) | 3 | 19 |
| light | 79 (6.2%) | 10 | 29 |
| universe | 77 (6.0%) | 7 | 23 |
| question | 70 (5.5%) | 4 | 13 |
| quantum | 69 (5.4%) | 3 | 14 |
| black | 60 (4.7%) | 15 | 27 |
| speed | 55 (4.3%) | 10 | 34 |
| gravity | 52 (4.1%) | 14 | 27 |
| hole | 47 (3.7%) | 9 | 24 |
r/AskPhysics Mentioned Domains Mentioned Domains in r/AskPhysics
Most linked sites Most linked sites in this subreddit
This community doesn't link off-site.
Its posts are text, images, or discussion rather than outbound links.
r/AskPhysics Top Posts Top Performing Posts in r/AskPhysics
Highest-performing posts Highest-performing posts. Each title links to Reddit.
Why doesn’t the sun have an iron core like the planets?
Why is water incompressible?
How can supermassive black holes on the scale of TON 618 even exist?
If two cars run into eachothers at 45km/h, would it be a 90km/h impact ?
Why is plasma considered the fourth state of matter?
If everything in an atom is waves how is anything solid?
what actually IS Energy?
Why is gravity limited by speed of light?
If molecular motion is related to temperature, is there a maximum temperature because nothing with mass can move at the speed of light
How are black holes even rotating?
| Title | Upvotes | Comments | Type | Date |
|---|---|---|---|---|
| Why doesn’t the sun have an iron core like the planets? | 265 | 271 | text | Sep 8 |
| Why is water incompressible? | 249 | 168 | text | Sep 7 |
| How can supermassive black holes on the scale of TON 618 even exist? | 221 | 67 | text | Sep 5 |
| If two cars run into eachothers at 45km/h, would it be a 90km/h impact ? | 199 | 185 | text | Sep 18 |
| Why is plasma considered the fourth state of matter? | 194 | 74 | text | Sep 26 |
| If everything in an atom is waves how is anything solid? | 191 | 173 | text | Sep 16 |
| what actually IS Energy? | 188 | 178 | text | Sep 20 |
| Why is gravity limited by speed of light? | 145 | 137 | text | Sep 25 |
| If molecular motion is related to temperature, is there a maximum temperature because nothing with mass can move at the speed of light | 135 | 62 | text | Sep 4 |
| How are black holes even rotating? | 128 | 149 | text | Sep 23 |
r/AskPhysics Audience Overlap r/AskPhysics Subreddit Overlap & Related Communities
Overlapping audiences Communities with overlapping audiences
r/AskPhysics FAQ Frequently Asked Questions About r/AskPhysics
What's the best time to post on r/AskPhysics?
Based on posting volume, r/AskPhysics is most active on Tuesdays around 11 AM UTC. That window has the most community activity, but busier hours also mean more competition for attention.
How active is r/AskPhysics?
r/AskPhysics averages 42 posts per day and ranks in the top 5% for activity among tracked SFW subreddits.
How many upvotes do posts on r/AskPhysics get?
Posts on r/AskPhysics average about 6 upvotes this month (net score per post).
What kind of posts does r/AskPhysics get most?
On r/AskPhysics, most posts are text posts (92%)