Browse Questions
Find answers to academic questions from our community
Why is significant figures important in chemistry?
Does it really matter if we write 2.0 g or 2 g?
Newton’s First Law
Why does a book on a table stay still until pushed?
Real-life analogy for the mole
Can you relate the mole to something we see daily?
Second Law
How does pushing a shopping cart relate to Newton’s 2nd law?
Why did Rutherford’s model fail?
Rutherford discovered the nucleus, but his model couldn’t explain something important. What was it?
Third Law
Why do guns recoil when fired?
How does Bohr’s model explain atomic spectra?
Why do hydrogen atoms give specific colored lines instead of a continuous spectrum?
Friction
Why is walking on ice so difficult?
Why do electrons not crash into the nucleus?
What keeps them from falling in, despite the attraction?
Types of Friction
Why is rolling easier than sliding?
What is the Heisenberg Uncertainty Principle?
Why can’t we know both position and momentum of an electron exactly?
Equilibrium
How can a hanging signboard stay still despite gravity pulling it?
Difference between orbit and orbital
Are they the same thing?
Impulse
Why does a cricket player lower hands while catching a ball?
Quantum numbers made simple
What do nn, ll, mm, and ss really mean?
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