I would think it would be D because if the velocity can change and if that changes then its either acceleration or deceleration. depends on how it changes.
I hope that helps! :)
The appropriate answer is a. HUNTER-GATHERER. Hunter-gatherer societies are nomadic and they forage for edible plants, bean, fruits and nuts. They also hunt wild game for food. Early humans in the Neolithic period practiced this way of life.
Agrarian societies thrive on agriculture which they depend on for sustainable and for trade. Animals and plants are domesticated and so people can settle and build a society. Pastoral agriculture is a semi-nomadic lifestyle where the society is centered around keeping herds of grazing animals. Industrial societies focus on manufacturing and this is the backbone of the society.
The differential change in entropy of a system is
given as: <span>
<span>dS = (∂S/∂T)_V dT </span>
We also know that </span>
<span>(∂S/∂T)_V = n*Cv/T, </span>
Where Cv is the molar heat capacity at constant
volume, and n is the number of moles. Combining the 2 equations:<span>
dS = n*Cv/T dT
Since Cv is constant as stated in the problem, therefore we
integrate the differential equation. Leading us to:
ΔS = n*Cv*ln(Tfinal/Tinitial)
<span>We are given that: V =
18L volume at P=2 kPa and T=298.15K. </span></span>
Using the ideal gas law to find the number of
moles of gas: <span>
n = p*V/R*T = (2kPa)*(18L)/((298.15K)*(8.314 L*kPa/(mol*K)))
n = 1.45*10^-2 mol
Going back to the entropy change:
ΔS = (1.45*10^-2 mol)*(20.17 J/(K*mol))*ln(1073.15/298.15)
<span>
<span>ΔS = 0.375 J/K</span></span></span>
Answer:
36.0%.
Explanation:
The mass of water = mass of hydrated copper (II) sulfate - mass of copper (II) sulfate after heating = 4.56 g - 2.92 g = 1.64 g.
The percent by mass of water in the hydrate = (mass of water/mass of hydrated copper (II) sulfate)*100 = (1.64 g/4.56 g)*100 = 35.96% ≅ 36.0%.
