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3 years ago

If it takes 150 n of force to accelerate an object at 30 m/s what is the mass of the object

1 answer:

3 0

F = ma.

Note Force should be = 150 N. Acceleration = 30 m/s2 ( Am presuming for your question you meant to write 30m/s2 and not 30m/s as you wrote)

150 = m ( 30)

150/30 = m.

5 = m

Mass of the object = 5 Kg.

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Find the intensity of a 55 dB sound given I 0=10^-12W/m^2

MakcuM [25]

Answer:

3.16 × $10^{-7}$ W/ $m^{2}$

Explanation:

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2 years ago

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3 years ago

Un cubo de madera de densidad 0.780 g/cm³ mide 11.2 cm en un lado. Cuando se coloca en agua, ¿qué altura del bloque flotará sobr

Stolb23 [73]

Answer:

2.464 cm above the water surface

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Recall that for the cube to float, means that the volume of water displaced weights the same as the weight of the block.

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weight of the block = 0.78 * 11.2^3 gr

Now the displaced water will have a volume equal to the base of the cube (11.2 cm^2) times the part of the cube (x) that is under water. Recall as well that the density of water is 1 gr/cm^3.

So the weight of the volume of water displaced is:

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we make both weight expressions equal each other for the floating requirement:

0.78 * 11.2^3 = 11.2^2 * x

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lukranit [14]

Explanation:

Value of the cross-sectional area is as follows.

A = $1.5 \times 2.30$

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The given data is as follows.

Allowable stress = 14,500 psi

Shear stress = 7100 psi

Now, we will calculate maximum load from allowable stress as follows.

$P_{max} = \sigma_{a}A$

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Now, maximum load from shear stress is as follows.

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