
Sound in a fluid/gas is incident on another fluid/gas. The properties are not know. What is...
A plane wave at 2,000 Hz has a sound intensity level of 75 dB. What is Prms in Pa? d. 3.6x10 5.1x10-1 f. None of the above a. 3.6x10-2 b. 1.1x10-1 c. 2.3x10-1 e. 0. A plane wave at 1,050 Hz in air at room temperature has a sound intensity level of 60 dB. What is the wavelength in ft? a. 0.27 b. 0.33 d. 0.90 1.07 e. c. 0.78 f. None of the above
A plane wave at 2,000...
11. Colligative properties. 75.0g of KBr is dissolved in 75.8mL of H,O and (P (H0-23.8 torr), boiling point, freezing point, and osmotic pressure Proto 1.00g/mL Find the vapor pressure of water of the solution. a. V.P. H2: d. О.Р.: 12. Mechanisms. Complete the table then answer the questions below: Step Elementary Reaction Elementary Rate Law Relative Rate 2A C C+B → D D→B+E Slow Fast Very Fast a. What is the balanced chemical equation? List all species that are reactants:...
c. 163 f. None of the above Sound is measured for a 1,500 Hz plane wave to have a velocity of 325 m/s. What is the expected air temperature in °C? -23 d. 72 a. b. -11 e. 95 f. None of the above c. 58 A plane wave is represented as p(x,t) = 5 cos(2x+12t). What characterizes this wave? Circle all that apply. d. Wavespeed is 1/6 e. Wavespeed is 6 f. None of the above Forward traveling a....
25-29
50 Sound A0:12 25 Plane sound waves of wavelength 0.12 m are incident on two narrow slits in a box with nonreflecting walls, as shown above. At a distance of 5.0m from the center of the slits, a first-order maximum occurs at point P, which is 3.0m from the central maximum. The distance between the slits is most nearly (A) 0.6 m (B) 0.09 m (C) 0.16m (D) 0.20m (E) 0.34 m An electron volt is a measure of...
11. Gas properties are affected by: A) pressure and volume b) temperature and moles. C) All of the above d) All answers are wrong. 11. Gas properties are affected by:
13. Sound travels at 340 m/s in air and 68 m/s in a dense gas. If the wavelength in the air is 2. 0 cm, what is the wavelength of sound of the same frequency in the dense gas? A. 10 cm B. 2. 0 cm C. 0. 40 cm D. 0. 89 cm E. 1. 4 cm F. 4. 5 cm G. 0. 80 cm
Use the following to answer questions 1-3: All 20 consumers are alike and each has a demand curve for a monopolist’s product of p= 120 – 2q. The cost of production C(Q) = 10Q. Let the monopolist charge a price of $r per unit purchased and a subscription fee of $F that must be paid by each purchaser. . Find the r and F that maximize profits? 1) What is r? Select one: A. r<0 B. 0≤r<4 C. 4≤r<8 D. 8≤r<12...
A constant output loudspeaker produces a sound level of 97 dB at 10 feet when located at the corner of two walls. What will be the sound level at the same distance if it is placed in an open area? a. 91 b. 94 d. 103 106 e. f. None of the above c. 97 A 200 Hz source radiates sound that produces a SPL of 85 dB at a distance of 1 meter. Is this SPL in the near-field?...
5–9 pleae show work
5. A gas sample at 1.0 atm and 25°C is heated at constant pressure until its volume is doubled. What is the final temperature of the gas? a. 298°C b. 323°C c. 596°C d. 50°C e. None of the above 6. The bond order of C-O bond in Co, is b. 1.33 c. 1.5 d. 2.0 e. None of the above 7. The electron configuration of copper ion (Cu) is a. [Ar] 4s 3d b. [Ar]...
Hydrogen is used as a working fluid in a gas turbine cycle. The pressure and temperature of hydrogen at the turbine inlet are 1000 kPa and 400 ◦C, respectively. The outlet pressure is 200 kPa. The expansion in the turbine is isentropic. Kinetic and potential energy changes are negligible. Properties of hydrogen can be found in the NIST–JANAF Thermochemical Tables, http://kinetics.nist.gov/janaf/. Questions: (a) Calculate the hydrogen temperature at the turbine outlet. (b) Calculate the work developed by the turbine, in...