All light combined is called

A balloon filled with helium gas has an average density of rhob = 0.27 kg/m3. The density of the air is about rhoa = 1.23 kg/m3.

8_murik_8 [283]

Answer: $34.84 m/s^2$

Explanation:

Given

density of balloon $\rho _{He}=0.27 kg/m^3$

density of air $\rho _a=1.23 kg/m^3$

volume of balloon $V=0.084 m^3$

If balloon is rising then

$F_b-mg=ma$

where $F_b=buoyant\ Force=\rho _a\times V\times g$

$mg=\rho _{He}\times V\times g=weight of gas$

$a=acceleration$

$\rho _a\times V\times g-\rho _{He}\times V\times g=\rho _{He}\times V\times a$

$\rho _a\times g-\rho _{He}\times g=\rho _{He}\times a$

divide by $\rho _{He}$

$\frac{\rho _a}{\rho _{He}}\times g-g=a$

$a=g(\frac{\rho _a}{\rho _{He}}-1)$

$a=g(\frac{1.23}{0.27}-1)$

$a=3.55\times 9.8$

$a=34.84 m/s^2$

3 0

3 years ago

On story ghost boy can you guys tell me something common and uncommon about them

Savatey [412]

Answer:

Sarah has no emotions

Explanation:

7 0

2 years ago

What might be a reason conflict arises?

Katena32 [7]

D- all of the above

Explanation:

Conflict is a clash between different ideas and people.

It can be as a result of the misunderstanding of another person's point of view. This is one of the leading causes of conflict. A party can take another party's view verbatim without understanding the context behind a reasoning. Through this, conflict can ensue.
It can also be due to non-compatible personalities. This can be between an extrovert and introvert or a blend of them.
Different values can also lead to conflict. It can be a cultural or religious thing.

Learn more;

Conflict brainly.com/question/799260

#learnwithBrainly

4 0

3 years ago

Read 2 more answers

Which statement best describes how work and power are different? a. To find work we need to know force and distance; to find pow

weqwewe [10]

A. To find work we need to know F and S; to find power we need to know F and V

6 0

3 years ago

Steam at 400C has a specific volume of 0.02m3/kg. Determine the pressure of the steam based on a) the ideal gas equation b) the

nikklg [1K]

Answer:

by ideal gas pressure = 15529.475 kPa

by compressibility chart pressure = 12576 kPa

by steam tables Pressure = 12517 kPa

Explanation:

given data

temperature T = 400°C = 673 K

volume v = 0.02 m³/kg

to find out

pressure by ideal gas, compressibility chart and steam tables

solution

we know here by table

gas constant R is 0.4615 kJ/ kg-K

and critical temp Tc = 647.1 K

and critical pressure Pc = 22064 kPa

so by ideal gas pressure is

pressure = R×T / v

pressure = 0.4615 × 673 / 0.02

pressure = 15529.475 kPa

and

by compressibility chart

temperature reduce is = T/ Tc

temperature reduce Tr = 673 / 647.1

Tr = 1.040 K

so pseudo reduce volume is here

reduce volume Vr = v / ( RTc/Pc)

reduce volume Vr = $\frac{0.02}{\frac{461.5(647.1)}{22064*10^{3} } }$

0.02 / ( 461.5(647.1) / 22064×10³)

reduce volume = 1.48

and we know by compressibility chart

reduce pressure Pr is 0.57

so

pressure = Pr × Pc

pressure = 0.57 × 22064 × 10³

pressure = 12576 kPa

and

from steam table

pressure is 12.5 MPa at 673 K and 0.020030 m³/kg

pressure is 15 MPa at 673 K and 0.015671 m³/kg

so

pressure P is

$\frac{0.02 - 0.020030}{0.015671 - 0.020030}$ = $\frac{ P - 12.5}{15 - 12.5}$

so

Pressure = 12517 kPa

4 0

3 years ago