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Physics Class 9

Doppler in sound

Why does a passing train whistle sound higher as it approaches and lower as it leaves?

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Asked on 01/11/2025
155 views
1 answers 50 votes
Physics Class 9

Loudness vs intensity

Why does loud music feel “vibrating” in your chest sometimes?

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Asked on 01/11/2025
158 views
1 answers 50 votes
Physics Class 9

Musical instruments

Why do guitar and violin produce different sounds even on the same note?

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Asked on 01/11/2025
154 views
1 answers 50 votes
Physics Class 9

Sonic boom

Why do fighter jets create a loud “boom” when flying fast?

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Asked on 01/11/2025
157 views
1 answers 50 votes
Physics Class 9

Density

Why do steel ships float when steel sinks?

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Asked on 01/11/2025
151 views
1 answers 50 votes
Physics Class 9

Buoyancy

Why do we feel lighter while swimming?

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Asked on 01/11/2025
157 views
1 answers 50 votes
Physics Class 9

Atmospheric pressure

Why don't we get crushed under the weight of air above us?

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Asked on 01/11/2025
150 views
1 answers 50 votes
Physics Class 9

Vacuum bottles

Why do thermos flasks keep drinks hot or cold longer?

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Asked on 01/11/2025
139 views
1 answers 50 votes
Physics Class 9

Surface tension

Why do small insects walk on water?

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Asked on 01/11/2025
153 views
1 answers 50 votes
Physics Class 9

Capillary action

How do trees lift water up from roots to leaves without pumps?

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Asked on 01/11/2025
152 views
1 answers 50 votes

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