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How can timber protect environment?

How to make wood fire resistant?


Describe the health and safety requirements of the area in which they are carrying out the scientific or technical activities
What is the advantages of bamboo, iron, timber, solar panel, grasscrete, recycled glass, green wall, aluminium alloy for construction?

How these construction materials can protect occupant health , improve employee productivity and reduce the overall impact to the environment?
suppose W weight fraction of "A "has been added to "B "to make an alloy, at room temperature "B" has a resistivity of p. find the current density as a function of the weight fraction "W" when the applied electronic field "E" is kept constant. Assume that M_Aand M_B the atomic masses of "A" and "B" respectively and η is the atomic concentration of " B"
suppose W weight fraction of "A "has been added to "B "to make an alloy, at room temperature "B" has a resistivity of p. find the current density as a function of the weight fraction "W" when the applied electronic field "E" is kept constant. Assume that M_Aand M_B the atomic masses of "A" and "B" respectively and η is the atomic concentration of " B"
Estimate the Young’s modulus of a material. Given r0=2.5 Å, n = 1, m = 9, and A = 7.68×10–29 J m.
formula factor of the safety (FS) in respect of stress calculate
For a 1080 steel that has been water quenched, estimate the tempering time at 535 C to
achieve a hardness of 45 HRC.
I have to design an active filter of order 2 low-pass rauch bessel structure. i found the circuit online under this name : MFB Complex Pole-Pair Section or Infinite-impulse, multiple feedback low pass filter. I have f cut=15Hz C1=50 pF. I need to find R1=R2=R3=R and C2. I was given the bessel coefficients a1=1.340, b1=0.490,a2=0.774, b2=0.389
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