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If a box full of feathers and a box full of bricks were to be dropped at the same time and from the same height, which one would hit the ground first?

In a vacuum (no air): -Both boxes fall at the same rate and hit the ground at the same time. -Gravity accelerates all objects equally at 9.8 m/s², regardless of mass. In real-world conditions (with air): -Ai...
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Which is heavier, a ton of feathers or a ton of lead?

They're both the same. The feathers would take up a lot more space though! Feathers have a lower density than lead (i.e. for the same volume, feathers are less heavy). In practice, if you drop a tonne of fea...
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Answered by Francis N. • Physics tutor
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Define Newton's three laws

1st Law - a body will move with constant velocity or remain at rest unless acted on by a resultant force 2nd Law - F = ma. The rate of change of momentum of an object is equal to the resultant force and it a...
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Answered by George W. • Physics tutor
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The focal length of the lens is 10 cm. Calculate the power of the lens. State the unit.

first, convert to metres:10cm = 0.1mlens power = 1/focal lengthpower = 1/0.1 =10units are Dioptres, Dso the power of the lens is 10 D
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Answered by Aleks H. • Physics tutor
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How does temperature relate to the structure of solids and liquids?

Temperature is defined as the average kinetic energy of a substance, and it is what determines whether an object is a solid or a liquid. When the temperature is low, the average kinetic energy of the substan...
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Answered by Aditya R. • Physics tutor
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