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3 years ago

PROVE YOUR INTELLIGNCE HERE!!!! (IMAGE ATTATCHED FOR YOUR CONVENIENCE)

Physics

1 answer:

gregori [183]3 years ago

8 0

Answer:

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Explanation:

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You have 0.5 l of air at a pressure of 203 kpa and -70°c in a rigid, sealed contaainer. what is the absolute tempertaure of the

ANTONII [103]

From the information given and if the question is complete then;
Absolute temperature is the temperature in Kelvin
To convert degree Celsius to kelvin we normally add 273
that is Kelvin = deg Celsius + 273
Thus since we have been given that the air was at -70 degrees celcius;
then; - 70° C + 273 = 203 K
Therefore; the absolute temperature is 203 K

5 0

3 years ago

A 250-kN railroad car A is traveling at 40 m/s while a 550-kN freight car B is traveling at 10 m/s (both cars heading to the rig

Damm [24]

Answer:

the maximum deformation undergone by the spring = 47.46 cm

Explanation:

Using conservation of momentum:

$m_Av_A + m_Bv_B = (m_A+m_B )v$

where:

$m_A = \frac{250\ kN}{g}$

$v_A = 40$

$m_B = \frac{550\ kN}{g}$

$v_B =10$

Then;

$m_Av_A + m_Bv_B = (m_A+m_B )v$

$\frac{250*10^3}{9.81}*40 + \frac{550*10^3}{9.81}*10 = (\frac{800*10^3}{9.81} )v$

$1580020.387 = 81549.43935 \ v$

$v = \frac{1580020.387}{81549.43935}$

v = 19.375 m/s

However ; using conservation of energy to determine the maximum deformation undergone by the spring ; we have:

$\frac{1}{2} [m_Av_A^2 +m_Bv_B^2] =\frac{1}{2}[(m_A+m_B)v^2 + kx^2]$

$[m_Av_A^2 +m_Bv_B^2] =[(m_A+m_B)v^2 + kx^2]$

$[\frac{250*10^3}{9.81}*40^2 + \frac{550*10^3}{9.81}*10^2] =[ (\frac{800*10^3}{9.81} )*19.375^2 + 70 *10^6 \ * x^2]$

x = 0.4746 m

x = 47.46 cm

Thus, the maximum deformation undergone by the spring = 47.46 cm

3 0

4 years ago

Read 2 more answers

How much heat is required to change 70 grams of water to steam at 100°C. (Lv=2.3 × 10^6J/kg)

skad [1K]

Answer:

161000 J

Explanation:

Please do mark as brainliest. Hope this helps! :)

4 0

3 years ago

The knights of labor do not believe in arbitration but believed in strikes? true or false

Rus_ich [418]

Answer - The given statement is false.

Explanation-

The members of knight of labour were opposing strikes and had a belief or boycott or arbitration.

A secret society was formed in 1869 by the tailors in Philadelphia and named Knights of labour. This union Organisation was formed to to get rights over equal pay if work is equal, abolish child labour, Work time of 8 hours and some graduated income tax reforms. This union was vertically organized.

5 0

3 years ago

The efficiency of a squeaky pulley system is 73 percent. The pulleys are used to raise a mass to a certain height. What force is

Mashutka [201]

Answer:

129.9 m

Explanation:

Efficiency is the ratio of work output to work input, expressed as a percentage.

$Efficiency= \frac {W_{out}}{W_{in}}$