What is the difference between SQL and NoSQL databases?

I'm learning about databases and I'm confused about when to use SQL vs NoSQL. What are the key differences and use cases for each?

How do I balance chemical equations?

I'm struggling with balancing chemical equations in my chemistry class. Can someone explain the process and provide some practice examples?

What are the main causes of World War I?

I'm writing an essay about WWI and need help understanding the complex causes that led to the war. Can someone explain the main factors?

Can you help me understand matrix multiplication?

I'm taking linear algebra and I'm confused about matrix multiplication. When is it possible and how do I do it step by step?

How do I calculate the derivative of a composite function?

I'm struggling with the chain rule in calculus. Can someone walk me through the steps with a specific example?