Calculate the change in the entropies of the system and the surroundings, and the total change in entropy, when the volume of a sample of argon gas of mass 21 g at 298 K and 1.50 bar increases from 1.20 dm3 to 4.60 dm3 in (a) an isothermal reversible expansion, (b) an isothermal irreversible expansion against pex = 0, and (c) an adiabatic reversible expansion.

A wire 100 meter long at 20 °C has a linear temperature coefficient of 2 * 10-51. The wire is heated and expands to a length of 100.01 m. What is the final temperature?

An atomizer forms water droplets 45μm in diameter. Determine the excess pressure within these droplets using σ = 0.0712 N/m.

What is the reaction A,? 600 N 60° 2 m 2 m

Determine the magnitudes of F1, F2 and F3 for equilibrium of the particle. (Figure 1)

3.5 kg of an ideal gas is heated at constant temperature from 15 m3 and 4.0 atm to 35 m3 at Determine the work done

For the open tank, the piezometers attached on the side, containing two different immiscible liquids, as shown in the figure, find the elevation of the liquid surface in piezometer A.

1. Two small plastic spheres are given positive electrical charges. When they are 15.0 cm apart, the repulsion force between them has a magnitude 0.220 N. What is the charge on each sphere? (a) If the two charges are equal and (b) if one sphere has four times the charge of the other? 2. Two charges, one of 2.50 µC (at the origin) and the other of -3.5 µC, are placed on the x-axis, one at the origin and the other at x=0.600 meters. Find the position on the x-axis where the net force on a small charge +q would be zero. = q2 = 2.0 µC are located at x = 0, y = 0.30 3. Two equal positive point charges q1 and x =0, y = -0.3 m, respectively. What are the magnitude and direction of the total (net) electric force that these charges exert on a third point charge Q = 4.0 µC at x= 0.40, y =0?

To ensure a tight fit, the aluminum rivet used in airplane construction are made slightly larger than the rivet holes and cooled by dry ice (solid CO2) before being driven. If the diameter of a hole is 0.500 cm, what should be the diameter of a rive at 20 degree Celsius if its diameter is equal that of a hole when the rivet is cooled to -78 degree Celsius, the temperature of dry ice? Assume the coefficient of expansion to remain constant.