A wheel and pulley is an example of a compound machine
Indicate whether the statement is true or false.
F
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Which of the following is a true statement about the Peng-Robinson parameters a andb?
A. The b variable is ultimately a function of universal physical constants and so has the same value for all compounds. B. The a variable can have units of L•J/kmol•mol C. The a variable is calculated by 27/64 (R^2 T_c^2)/P^2 D. The b variable has dimensions of amount of substance per length to the third power. E. None of these statements are true.
Vehicles built today are in service longer than vehicles built twenty years ago
A) True B) False
The _________ additive helps a lubricant to cushion shock and rubbing action
A. extreme pressure B. detergent C. dispersant D. oxidation
Hash marks drawn across raceway or cable lines indicate the number and use of the installed ________.
What will be an ideal response?