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Vinvika [58]
3 years ago
6

What is the mass number of the missing daughter nuclei?

Physics
2 answers:
madreJ [45]3 years ago
8 0

Answer: 90

Explanation:

To calculate the mass number of the missing daughter nuclei, the equation must be balanced.

The sum of the mass number in the left hand side = 1 + 235 = 236

The sum of mass number in the right hand side must be equal to 236.

Then, 236 - (143 + 3×1)

236 - ( 143 + 3)

236 - 146 = 90

Nastasia [14]3 years ago
6 0

Answer:

90

Explanation:

The mass number of the missing daughter nuclei can be obtained as shown in the attached photo.

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A frictionless piston-cylinder device contains 10 kg of superheated vapor at 550 kPa and 340oC. Steam is then cooled at constant
Alla [95]

Answer:

a) the work (W) done during the process is -2043.25 kJ

b) the work (W) done during the process is -2418.96 kJ

Explanation:

Given the data in the question;

mass of water vapor m = 10 kg

initial pressure P₁ = 550 kPa

Initial temperature T₁ = 340 °C

steam cooled at constant pressure until 60 percent of it, by mass, condenses; x = 100% - 60% = 40% = 0.4

from superheated steam table

specific volume v₁ = 0.5092 m³/kg

so the properties of steam at p₂ = 550 kPa, and dryness fraction

x = 0.4

specific volume v₂ = v_f + xv_{fg

v₂ = 0.001097 + 0.4( 0.34261 - 0.001097 )

v₂ = 0.1377 m³/kg

Now, work done during the process;

W = mP₁( v₂ - v₁ )

W = 10 × 550( 0.1377 - 0.5092 )

W = 5500 × -0.3715

W = -2043.25 kJ

Therefore, the work (W) done during the process is -2043.25 kJ

( The negative, indicates work is done on the system )

b)

What would the work done be if steam were cooled at constant pressure until 80 percent of it, by mass, condenses

x₂ = 100% - 80% = 20% = 0.2

specific volume v₂ = v_f + x₂v_{fg

v₂ = 0.001097 + 0.2( 0.34261 - 0.001097 )

v₂ = 0.06939 m³/kg

Now, work done during the process will be;

W = mP₁( v₂ - v₁ )

W = 10 × 550( 0.06939 - 0.5092 )

W = 5500 × -0.43981

W = -2418.96 kJ

Therefore, the work (W) done during the process is -2418.96 kJ

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3 years ago
Newton's third law of motion says that for every action there is a(n)<br> and opposite reaction.
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Answer:

that's correct.

Explanation:

4 0
3 years ago
Will mark brainlest helpp!!!!!!​
Luda [366]

Answer:

I don't know if it is correct or not.

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Why is genetics considered a theory and not a hypothesis?
lukranit [14]
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6 0
3 years ago
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Una grúa efectúa un trabajo de 45000 joules en 0.1
Hunter-Best [27]

Answer:

<em>P = 7.5 KW</em>

<em>P = 7500 W</em>

Explanation:

<u>Potencia Mecánica</u>

Es una medida del trabajo realizado por un agente por unidad de tiempo.

Siendo W el trabajo mecánico y t el tiempo necesario para realizarlo, entonces la potencia viene dada por:

\displaystyle P=\frac{W}{t}

La unidad SI de la potencia es el vatio (W). Otra unidad muy común es el kilovatio (KW). 1 KW = 1000 W.

La grúa realiza un trabajo W=45000 Joules en un tiempo de t=0.1 minutos.

Para calcular la potencia en vatios, es necesario llevar el tiempo a segundos:

t = 0.1 min *60 = 6 segundos.

La potencia se calculará ahora:

\displaystyle P=\frac{45000}{6}

P = 7500 W

En kilovatios:

P = 7500 / 1000 = 7.5 KW

P = 7.5 KW

3 0
3 years ago
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