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3 years ago

1. What was Karl Marx’s basic premise and belief?

1 answer:

7 0

Karl Marx's basic belief was that the working class will start revolution in the most developed capitalistic countries. One of the basic premises of his thinking was maybe expressed in the first sentence of his The Communist Manifesto: "The history of all hitherto existing society is the history of class struggles." He claimed that human societies progress through class struggle: <span>a conflict between an ownership class that controls production and a dispossessed laboring class that provides the labor for production.</span>

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In a closed system one kilogram of carbon dioxide (CO_2) is expanded reversibly from 30 degree C and 200 kPa to 100 kPa pressure

lianna [129]

Answer:

the total work W = 29.05 kJ

the change in total internal energy is $\mathbf{\Delta U = - 27.19 \ kJ}$

the total heat transferred in [kJ] is Q = 1.860 kJ

Explanation:

Given that

mass of carbon dioxide in the closed system = 1 kg

Temperature $T_1= 30 ^0 C$ = (273+30 ) K = 303 K

Pressure $P_1 = \ 200 \ kPa$

Pressure $P_2 = 100 \ kPa$

polytropic expansion n = 1.27

Note that we are also given the following data set:

R = 188.9 J/kg.K

c_v = 655 J/kg.K

So; for a polytropic process ; $PV^{1.27} = c$

$\dfrac{T_2}{T_1}= ( \dfrac{V_1}{V_2})^{n-1} = (\dfrac{P_2}{P_1})^{\frac{n-1}{n}$

$T_2 = T_1 [\dfrac{P_2}{P_1}]^{\frac{n-1}{n}$

$T_2 = 303 [\dfrac{100}{200}]^{\frac{1.27-1}{1.27}$

$T_2 = 261.48 \ K$

Since the system does not follow the first order of thermodynamics; To calculate the total work by using the expression:

$W = \dfrac{P_1V_1-P_2V_2}{n-1} = \dfrac{mR(T_1-T_2)}{n-1}$

$W = \dfrac{1*188.9(303-261.48)}{1.27-1}$

W = 29048.62222 J

W = 29.05 kJ

Thus, the total work W = 29.05 kJ

The change in internal energy can be expressed by the formula:

$\Delta U = mc_v (T_2-T_1)$

$\Delta U = 1*655(261.48-303)$

$\Delta U = -27195.6 \ J$

$\mathbf{\Delta U = - 27.19 \ kJ}$

Hence; the change in total internal energy is $\mathbf{\Delta U = - 27.19 \ kJ}$

Finally; to determine the total heat transferred in [kJ]; we go by the expression for the first order of thermodynamics which say:

Total Heat Q = ΔU + W

Q = (-27.19 + 29.05)kJ

Q = 1.860 kJ

Hence; the total heat transferred in [kJ] is Q = 1.860 kJ

8 0

3 years ago

The successful marketing campaign what happens in vegas stays in vegas is an example of:_____a.place marketing

kotegsom [21]

I believe the answer is C

4 0

4 years ago

What factors might be considered when creating a tax that is considered fair by most people in a society? explain?

svet-max [94.6K]

<span>Factors to be considered when creating a tax that is fair to people on society is income, bracket of living (poor, middle class, etc). and financial factors as so. This ensures that everyone gets a fair tax, and will be agreed upon by everybody.</span>

4 0

3 years ago

A loop of wire carrying a current of 2.0 A is in the shape of a right triangle with two equal sides, each 15 cm long. A 0.7 T un

Akimi4 [234]

Answer:

F = 0.312 N

Explanation:

Given,

Current, I = 2 A

Length of the equal side = 15 cm = 0.15 m

Magnetic field, B = 0.7 T

Magnetic filed is parallel to hypotenuse

θ = 135°

Force on the first side of the triangle

$F = i BL \sin \theta$

Force on the another side

$F = i BL \sin \theta$

Resultant magnetic Force

$F = 2 \times 2\times 0.7 \times 0.15 \sin 135^0$

F = 0.312 N

8 0

3 years ago

At December 31, Amy Jo's Appliances had account balances in Accounts Receivable of $314,000 and in Allowance for Uncollectible A

Alex787 [66]

Answer:

$11,750

Explanation:

The computation of bad debt is shown below:-

Bad debt expense = Estimated allowance for uncollectible at the year end - Existing balance in allowance for uncollectible account credit balance

= ($314,000 × 4%) - $810

= $12,560 - $810

= $11,750

Therefore for computing the bad debt expenses we simply applied the above formula.

8 0

3 years ago