Privacy and Cookies Policy

Last Updated: August 25, 2026

Introduction

Core Physics Fundamentals ("we," "us," "our") operates corephysicsfundamentals.com (the "Site"). This Privacy and Cookies Policy explains what information we collect, why we collect it, how we use it, and your rights regarding that information.

We are committed to protecting your privacy and being transparent about our data practices. This site is designed as a privacy-first educational platform. We collect the minimum amount of data necessary to operate and improve the site, and we do not sell, rent, or trade your personal information to anyone.

By using this site, you agree to the collection and use of information as described in this policy. If you do not agree, please discontinue use of the site.

Information We Collect

Information You Voluntarily Provide

We collect information that you actively choose to provide when interacting with features on this site:

• Comment form: When you submit a comment on an article, we collect your name, email address, and the content of your comment. Your phone number and website are optional fields. Your email address and website are never displayed publicly — only your name and comment text appear on the site.
• Newsletter subscription: When you subscribe to our newsletter, we collect your email address. We use this solely to send you educational content updates and new article notifications.
• Contact form: When you contact us through our contact page, we collect your name, email address, subject, and message content. This information is used only to respond to your enquiry.

Information Collected Automatically

When you visit this site, certain technical information is collected automatically:

• Analytics data: We use Cloudflare Web Analytics, a privacy-focused analytics service that does not use cookies, does not track individual users, and does not collect personal information. It provides aggregate data only — page views, referral sources, browser types, and country-level location data. No individual visitor profiles are created.
• Server logs: Our hosting provider (Cloudflare) may temporarily log IP addresses, request timestamps, and page URLs as part of standard web server operation, security protection, and DDoS mitigation. These logs are managed by Cloudflare under their own privacy policy and are not accessible to us as individual records.

Information We Do Not Collect

We want to be explicit about what we do not do:

• We do not create user profiles or track individuals across sessions.
• We do not use fingerprinting or any invasive identification technique.
• We do not collect payment information — this site has no e-commerce functionality.
• We do not knowingly collect data from children under 13 (see Children's Privacy section).
• We do not use advertising tracking pixels, retargeting scripts, or social media tracking widgets.

Cookies and Tracking Technologies

What Are Cookies

Cookies are small text files that websites place on your device (computer, phone, or tablet) to store small pieces of information. They are widely used to make websites work more efficiently and to provide information to site owners.

Cookies We Use

This site uses minimal cookies:

• Essential/functional cookies: Cloudflare may set security-related cookies (such as __cf_bm and cf_clearance) to protect the site from malicious traffic, manage bot detection, and ensure the site loads correctly. These are strictly necessary for site operation and security.
• Analytics cookies: Google Analytics sets cookies (such as _ga and _ga_*) to distinguish unique users and throttle request rates. These cookies help us understand how visitors interact with the site in aggregate.
• Session cookies: If you interact with forms on this site, temporary session-related data may be stored to process your submission. These expire when you close your browser.

We do not use:

• Advertising cookies
• Social media tracking cookies
• Third-party marketing cookies
• Persistent tracking cookies beyond analytics

Third-Party Cookies

If we integrate third-party services in the future (such as embedded videos or interactive widgets), those services may set their own cookies. We will update this policy to reflect any such additions. Currently, the third-party services that may set cookies are Cloudflare (our hosting and security provider) and Google Analytics (our analytics provider).

How to Manage Cookies

You can control cookies through your browser settings. Most browsers allow you to block or delete cookies, though doing so may affect the functionality of some websites. Since this site relies on minimal cookies, blocking cookies should not significantly impact your experience.

To manage cookies in common browsers:

• Chrome: Settings → Privacy and Security → Cookies and other site data
• Firefox: Settings → Privacy & Security → Cookies and Site Data
• Safari: Preferences → Privacy → Manage Website Data
• Edge: Settings → Cookies and site permissions → Manage and delete cookies

How We Use Your Information

We use the information we collect for the following purposes:

• To display comments: Your name and comment text are displayed publicly on article pages. Your email address is stored but never shown publicly — it is used only to identify your comment internally and to contact you if necessary regarding your comment.
• To send newsletters: Your email address is used to send you updates about new articles, calculators, and educational content. You can unsubscribe at any time using the link in any newsletter email.
• To respond to contact enquiries: Your contact form submissions are used solely to read and respond to your message.
• To improve the site: Aggregate analytics data helps us understand which content is most useful, which pages need improvement, and how to better serve our audience.
• To protect the site: Security measures (managed by Cloudflare) help prevent abuse, spam, and malicious attacks.

Data Sharing and Third Parties

We do not sell, rent, trade, or share your personal information with third parties for marketing or advertising purposes.

The only third parties who may process data in connection with this site are:

• Cloudflare: Our hosting, CDN, and security provider. Cloudflare processes requests to deliver site content and provide DDoS protection. Their privacy policy is available at cloudflare.com/privacypolicy.
• Google Analytics: We use Google Analytics to collect aggregate usage data. Google's privacy policy is available at policies.google.com/privacy.
• Email service provider: If you subscribe to our newsletter, your email address is processed by our email delivery service to send newsletters. We use reputable, GDPR-compliant providers.

We may disclose your information if required to do so by law, court order, or governmental regulation, or if we believe disclosure is necessary to protect our rights, your safety, or the safety of others.

Data Retention

• Comments: Published comments are retained indefinitely as part of the site's educational content. If you request removal of your comment, we will delete it within 30 days.
• Newsletter subscriptions: Your email address is retained while your subscription is active. If you unsubscribe, your email is marked as inactive and removed from our mailing list. You may request permanent deletion at any time.
• Contact form submissions: Messages are retained for up to 12 months to allow us to reference past conversations if needed, after which they are deleted.
• Analytics data: Cloudflare Web Analytics retains aggregate data for up to 6 months. Google Analytics retains data according to our configured retention period. No individual-level data is stored by us.
• Server logs: Cloudflare retains server logs according to their own data retention policy, typically for a limited period for security analysis.

Data Security

We take reasonable measures to protect the information we collect:

• All data is transmitted over HTTPS (TLS encryption).
• The site is served through Cloudflare's global network with built-in DDoS protection, WAF (Web Application Firewall), and bot management.
• Admin access to site data is protected by authentication and restricted to authorised personnel only.
• We do not store passwords, payment details, or sensitive personal data beyond what is described in this policy.

While we implement these safeguards, no method of electronic transmission or storage is 100% secure. We cannot guarantee absolute security but are committed to industry-standard practices to protect your data.

Your Rights

For Users in the European Economic Area (GDPR)

If you are located in the EEA, you have the following rights under the General Data Protection Regulation (GDPR):

• Right of access: You can request a copy of the personal data we hold about you.
• Right to rectification: You can request correction of inaccurate or incomplete data.
• Right to erasure: You can request deletion of your personal data ("right to be forgotten").
• Right to restrict processing: You can request that we limit how we use your data.
• Right to data portability: You can request your data in a structured, machine-readable format.
• Right to object: You can object to processing of your data for specific purposes.

Our legal basis for processing your personal data includes: consent (when you submit a form or subscribe), legitimate interest (for site operation and security), and compliance with legal obligations.

To exercise any of these rights, contact us through our Contact page. We will respond within 30 days.

For Users in California (CCPA)

If you are a California resident, the California Consumer Privacy Act (CCPA) provides you with specific rights:

• Right to know: You can request details about the categories of personal information we collect and how it is used.
• Right to delete: You can request deletion of personal information we have collected from you.
• Right to opt out: You have the right to opt out of the sale of personal information. We do not sell personal information, so this right is automatically satisfied.
• Right to non-discrimination: We will not discriminate against you for exercising your CCPA rights.

For All Users

Regardless of your location, you can:

• Unsubscribe from our newsletter at any time using the link in any email.
• Request deletion of your comments or contact submissions.
• Ask us what data we hold about you.
• Contact us with any privacy-related questions or concerns.

Children's Privacy

This site provides educational physics content suitable for students of all ages. However, we do not knowingly collect personal information from children under 13 years of age (or the applicable age of digital consent in your jurisdiction).

Our comment form, newsletter subscription, and contact form are intended for use by individuals who are at least 13 years old. If you are under 13, please ask a parent or guardian to submit any forms on your behalf.

If we become aware that we have collected personal data from a child under 13 without verified parental consent, we will take steps to delete that information promptly. If you believe we may have inadvertently collected data from a child under 13, please contact us immediately through our Contact page.

Do Not Track Signals

Some browsers send a "Do Not Track" (DNT) signal to websites. Because this site does not use cookie-based tracking to create individual user profiles, we effectively honour DNT by default — our analytics are aggregate-only and privacy-preserving regardless of your browser's DNT setting.

International Data Transfers

This site is hosted on Cloudflare's global CDN, which means your request may be served from a data centre in any country where Cloudflare operates. Cloudflare maintains appropriate data protection standards, including compliance with EU-US data transfer frameworks.

If you submit data through forms on this site, that data may be processed and stored in locations outside your country of residence. We ensure that any such transfers are conducted with appropriate safeguards in place.

Changes to This Policy

We may update this Privacy and Cookies Policy from time to time to reflect changes in our practices, services, or legal requirements. When we make changes, we will update the "Last Updated" date at the top of this page.

We encourage you to review this page periodically. Continued use of the site after any modifications constitutes acceptance of the updated policy.

Contact Us

If you have any questions about this Privacy and Cookies Policy, your data, or your rights, you may contact us at: