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3 years ago

What's the weight of a 30x30x50 cm body with the density of 1.8/cm cube?

Physics

1 answer:

grin007 [14]3 years ago

3 0

Answer:

The weight of the body, W = 793.8 m/s²

Explanation:

Given,

The volume of the body, v = 45,000 cm³

The density of the body, ρ = 1.8 g/cm³

The mass of the body is given by the formula,

m = ρ x v

= 1.8 g/cm³ x 45,000 cm³

= 81,000 g

Hence, the mass of the body is m = 81 kg

The weight of the body,

W = m x g

= 81 kg x 9.8 m/s²

= 793.8 m/s²

Hence, the weight of the body, W = 793.8 m/s²

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A music fan at a swimming pool is listening to a radio on a diving platform. The radio is playing a constant- frequency tone whe

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Answer:

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(ii) When the source is receding from the observer, we have;

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Therefore;

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(2) The frequency is not constant as the speed of the source is increasing while it under the acceleration due to gravity

(3) During the fall, the speed of the source continuously increases under the effect of gravitational attraction and therefore the frequency heard by the person on the platform becomes progressively smaller

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For the the person down below on the rubber raft, the radio source is advancing

Therefore, the radio source is moving towards the person at rest down on the rubber raft, therefore, we have;

$f' = \left (\dfrac{v }{v - v_s} \right) \times f$

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(2) The frequency is not constant as the speed of the source is increasing while it under the acceleration due to gravity

Explanation:

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