22 Select the correct answer.
Which type of wall would make the best soundproofing for room?
A
B.
1.0 centimeter thick glass
two layers of 0.5 centimeter thick glass with 0.5 centimeters of air between them
two layers of 0.5 centimeter thick glass with 0.3 centimeters of vacuum between them
OC
OD
1.0 centimeter thick steel
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Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy

This is the number of complete movements of a wave per second.

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.