What is the characteristic impedance of a J1939 data bus?
A. 25 ohms
B. 75 ohms
C. 120 ohms
D. 180 ohms
Answer: C
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Si la fuente de voltaje de un circuito suministra 240V y la resistencia mide 5 ohmios, la corriente en el circuito es de _____ amperios.
a. 20 b. 25 c. 48 d. 235
For a given temperature, the vapor pressure can be defined as:
A. The pressure gradient at the VLE interface. B. The pressure that the liquid exerts on the floor of the container. C. The pressure that will lead to boiling. D. The pressure that allows pure liquid and pure vapor to coexist in VLE at a specific temperature. E. None of these are accurate descriptions.
Briefly define the terms volumetric efficiency and thermal efficiency.
What will be an ideal response?
Briefly describe the progress made in cleaning up the environment between 1970 and the present
What will be an ideal response?