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Chemistry #76
Answered
Order of reaction

What is meant by order and molecularity of a reaction?

Physics #77
Answered
Conservation of momentum

Why does a gun recoil when fired?

Physics #78
Answered
Holography

How is a hologram different from a photograph?

Chemistry #79
Answered
Effect of temperature

Why do reactions speed up with temperature?

Physics #80
Answered
Static vs kinetic friction

Why is it harder to start pushing a heavy box than to keep it moving?

Physics #81
Answered
Relativity

Why does time slow down near the speed of light?

Chemistry #82
Answered
Catalyst role

How do catalysts affect reaction rate? Give examples.

Physics #83
Answered
Centripetal force

Why doesn’t a stone fly off when whirled on a string?

Physics #84
Answered
Quantum Tunneling

How do particles “tunnel” through barriers in quantum mechanics?

Chemistry #85
Answered
Arrhenius equation

Derive and explain Arrhenius equation.

Physics #86
Answered
Impulse in sports

Why do cricketers lower their hands when catching a fast ball?

Physics #87
Answered
X-Rays

How are X-rays produced?

Chemistry #88
Answered
What is adsorption?

Explain physisorption vs chemisorption.

Physics #89
Answered
Equilibrium

Why does a tightrope walker carry a long pole?

Physics #90
Answered
MRI Scans

Why are MRI scans safer than X-rays?

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