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vesna_86 [32]
3 years ago
5

If density of an object is 3gcm-3, will it float or sink in water.

Physics
1 answer:
Tema [17]3 years ago
3 0

The density of water is about 1g/cm³. This object is more dense than water, so it will sink.

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Use the worked example above to help you solve this problem. An Alaskan rescue plane drops a package of emergency rations to str
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Answer:

(a) The package lands 682 meters horizontally ahead from the point the package was dropped from the plane

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Explanation:

The parameters given are;

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Height of the plane above the ground, h = 1.50 × 10² m = 1,500 m

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The package lands 682 meters horizontally ahead from the point the package was dropped from the plane

(b) The vertical velocity, v_y, of the package just before landing is given by the relation;

v_y² = u² + 2·g·h

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∴ v_y² = 0 + 2×9.81×1500 = 29430 m²/s²

v_y = √29430  = 171.55 m/s

Hence the horizontal component = 39.0 m/s

The vertical component = 171.55 m/s

(c) The angle of impact, θ, is given as follows;

tan \theta = \dfrac{v_y}{v_x}  = \dfrac{171.55}{39.0 } = 4.4

∴ θ = tan⁻¹(4.4) = 77.19°.

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