541 ms in total
149 ms
289 ms
103 ms
Click here to check amazing PhysicsLAB content for United States. Otherwise, check out these important facts you probably never knew about physicslab.org
PhysicsLAB, an online high school physics program, was started in 1997. Online content can be accessed through a comprehensive table of contents, search engine, and in curriculum groups.
Visit physicslab.orgWe analyzed Physicslab.org page load time and found that the first response time was 149 ms and then it took 392 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster. This domain responded with an error, which can significantly jeopardize Physicslab.org rating and web reputation
physicslab.org performance score
name
value
score
weighting
Value2.2 s
77/100
10%
Value3.0 s
78/100
25%
Value2.8 s
96/100
10%
Value1,760 ms
10/100
30%
Value0.026
100/100
15%
Value6.7 s
56/100
10%
149 ms
57 ms
60 ms
63 ms
63 ms
Our browser made a total of 25 requests to load all elements on the main page. We found that 92% of them (23 requests) were addressed to the original Physicslab.org, 8% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (150 ms) belongs to the original domain Physicslab.org.
Page size can be reduced by 22.6 kB (29%)
77.6 kB
55.0 kB
In fact, the total size of Physicslab.org main page is 77.6 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 35.3 kB which makes up the majority of the site volume.
Potential reduce by 10.1 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 2.5 kB, which is 17% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 10.1 kB or 70% of the original size.
Potential reduce by 3.3 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. PhysicsLAB images are well optimized though.
Potential reduce by 34 B
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.
Potential reduce by 9.2 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Physicslab.org needs all CSS files to be minified and compressed as it can save up to 9.2 kB or 86% of the original size.
We found no issues to fix!
21
21
The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of PhysicsLAB. According to our analytics all requests are already optimized.
physicslab.org
149 ms
PhysicsLab.css
57 ms
Home.gif
60 ms
Directions.jpg
63 ms
SearchEngine.jpg
63 ms
TableContents.jpg
65 ms
VertSpace.jpg
65 ms
Review.jpg
82 ms
Lessons.jpg
121 ms
Worksheets.jpg
121 ms
Labs.jpg
122 ms
Compilations.jpg
121 ms
AAPT.jpg
122 ms
Amusing.jpg
121 ms
APEssays.jpg
122 ms
APEquations.jpg
121 ms
CPWorkbooks.jpg
122 ms
MCAS.jpg
124 ms
NextTime.jpg
125 ms
NYRegents.jpg
137 ms
Physlets.jpg
144 ms
PracticeProblems.jpg
149 ms
PLyear7.gif
150 ms
ga.js
31 ms
__utm.gif
13 ms
physicslab.org accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Links do not have a discernible name
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
physicslab.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Browser errors were logged to the console
physicslab.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Physicslab.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Physicslab.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
physicslab.org
Open Graph description is not detected on the main page of PhysicsLAB. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: