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insens350 [35]
3 years ago
15

The world’s largest gold bar, worth ten million dollars in 2014, has a base measuring 46 cm ×

Physics
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

a} 2400 N

b}240 kg

Explanation:

Pressure is force per unit area.

Given from the question that;

The pressure = 24000 Pa

Area = 0.46 * 0.22 =0.1012 m²

Calculating force from the formula;

P= F/A where P is pressure, F is force and A is area then

F= P*A = 24000*0.1012 = 2428.8 N

a) The weight is 2400 N  in 2 significant figures

b) Mass is calculated from the formula;

w= m* g  where w is weight, m is mass and g is acceleration due to gravity

2400 =  m * 9.81

m= 2400/ 9.81

m= 244.64

m= 240 kg { in 2 significant figures}

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Answer: Partial pressure of nitrogen and xenon are 288mmHg and 548 mmHg respectively.

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The partial pressure of a gas is given by Raoult's law, which is:

p_A=p_T\times \chi_A

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p_A = partial pressure of substance A

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\chi_A = mole fraction of substance A

We are given:

m_{N_2}=2.80g

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Mole fraction of nitrogen is given as:

\chi_{N_2}=\frac{\frac{m_{N_2}}{M_{N_2}}}{(\frac{m_{N_2}}{M_{N_2}}+\frac{m_{Xe}}{M_{Xe}})}

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Putting values in above equation, we get:

\chi_{N_2}=\frac{\frac{2.80}{28}}{\frac{2.80}{28}+\frac{24.9}{131}}

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To calculate the mole fraction of xenon, we use the equation:

\chi_{Xe}+\chi_{N_2}=1\\\\\chi_{Xe}=1-0.345=0.655

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b)

The gravitational force on an object is the force with which the object is pulled towards the ground by the Earth.

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m is the mass of the object

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In order to find the magnitude of this force, we apply Newton's second law of motion along the vertical direction.

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This means that the net force is zero:

\sum F=0

And so, we can find the normal force:

N-W=0\\N=W=1.96 N

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