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gladu [14]
3 years ago
8

A 25 kg rock resting on the bottom of a lake must be moved from the paths of boats. The rock has a density of 2350 kg/m^3. What

force is needed to lift the rock while under water?
Physics
1 answer:
algol133 years ago
7 0

Answer:

The force needed is the weight of the rock minus the buoyant force.

Explanation:

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She should use shorter focal length to fit the entire landscape which she is trying to photograph into her picture.

What is focal length?

The focal length is a measure of how strongly the system converges or diverges light.

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