How does a sound wave travel in air?
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Explain why does a tea kettle sing?
Describe the Sphygmanometer?
Does a soccer ball go faster in the air on a cold or hot day?
Explain the steps to the scientific notation?
What is the longest lasting synthetic periodic element?
why ac is attractive and dc is repulsive?
Why are the days and nights equal at the Equator throughout the year?.
What is Caustic soda ?
How does a sailor find his longitude ?
our breath can produce current?
Explain the Dew Point ?
Explain what is the shadows?