A wheel and pulley is an example of a compound machine
Indicate whether the statement is true or false.
F
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Hash marks drawn across raceway or cable lines indicate the number and use of the installed ________.
What will be an ideal response?
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
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.