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Why can light travel through space but sound cannot?

There are two types of waves: transverse and longitudinal. Light is a transverse wave, therefore its oscillations are perpendicular to the direction of motion....

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"If a person weighs 400N and the total area of their feet is 120cm^2, what is the pressure they are exerting on the ground?"

A: Pressure is defined as the amount of force exerted on a surface per unit area. Equation-wise, it can be written as follows:Now, we have the person’s weight -...

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Why do people not fall from the earth?

A: For that, we have gravity to thank! People and the planet Earth both have masses, and so there’s a gravitational force of attraction experienced between the...

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