A Diesel engine with a compression ratio of 16 has a cutoff ratio of 1.5. The state before polytropic compression (exponent 1.3) is 1700 cm3, 96 kPa and 22°C and there is isentropic expansion.
(a) Sketch the P-v diagram for this cycle.

(b) Calculate the heat transfer in and heat transfer out.

(c) Determine the thermal efficiency.

(d) Calculate the mean effective pressure.

A car and the suspension system are a damped spring, mass system, with a natural frequency 2 Hz and a damping coefficient 0.2. The car drives at speed V over a road with sinusoidal roughness. The roughness wavelength is 20 m, with a amplitude of 50 cm. What speed does the maximum amplitude of vibration occur? What is the corresponding vibration amplitude?

Please do not use an older solution.

for low pressure effusion of gases

how do I calculate area of pinhole and pinhole diameter?

ln(P/P₀) = -Ct

dP/P = - (A/V)(RT/2πM)^1/2 dt = -C dt

(volume= 285cm³, T= 298.15K)

I got relaxation constant  0.01049 microns/second = C

This is for N2 ( nitrogen)

How do i solve A (pinhole are)?

2.50 mole of perfect gas at 0°C is expanded from an initial pressure of 5.00 atm to a final pressure of 1.00 atm against a constant external pressure of 1.00 atm. (a) isothermally and (b) adiabatically. (1) Calculate the values of q, w, DU, DH, DS, DSsur and DStot for (a) and (b) (2) Draw p -V diagram to represent these two different paths.

For cell Al I Al3+ 1M II Be2+ 1x10^-4 M I Be (s) Write the overall net ionic equation Calculate the cell potential E cell at 25 C and predict the spontaneity of the overall reaction Calculate the cell potential at 300 degrees C and predict the spontaneity of the overall reaction The standard reduction potentials are Al- -1.66V Be -1.85 V

0.737 g of a sample contains iron. all amount of iron is oxidied to Fe2+ on Pt anode which has constant potential at 1.0 V against SCE. an iodide chemical coulometer is used to measure the amont of current (Q), the amount of released iodide needs 27.mL of thiosulfate (0.0217 N). calculate the percentage of Fe3O4 in the sample. (current 10 mA)

A particular laser pointer emits a beam with an average power of 5.00 mW, and the beam has a circular cross-section with a diameter of 3.00 mm. The beam is linearly polarized. The average intensity of the light is 707.7 W/m². Determine the following.

(a) the amplitude of the oscillating electric field in the laser beam (V/m)

(b) the amplitude of the oscillating magnetic field in the laser beam (T)

A voltaic cell is constructed from an Ni2+(aq)−Ni(s) half-cell and an Ag+(aq)−Ag(s) half-cell.The initial concentration of Ni2+(aq) in the Ni2+−Ni half-cell is [Ni2+]= 1.80×10⁻² M . The initial cell voltage is +1.13 V .

1. By using data in Table 20.1 in the textbook, calculate the standard emf of this voltaic cell.

A voltaic cell is constructed that is based on the following reaction: Sn2+(aq)+Pb(s)→Sn(s)+Pb2+(aq).

1. If the concentration of Sn2+ in the cathode compartment is 1.50 M and the cell generates an emf of 0.25 V , what is the concentration of Pb2+ in the anode compartment?

2.If the anode compartment contains [SO2−4]= 1.00 M in equilibrium with PbSO4(s), what is the Ksp of PbSO4?

A concentration cell is built based on the following half reactions by using two pieces of gold as electrodes, two Au3+ solutions, 0.101 M and 0.423 M, and all other materials needed for a galvanic cell. What will the potential of this cell be when the cathode concentration of Au3+ has changed by 0.035 M at 307 K?

Au3+ + 3 e- → Au Eo = 1.50 V