Which of the following leaf modifications is beneficial in a low-light environment, e. g., the understory of a rainforest? (more than one choice may apply.)

(a) iridescent and reflective.
(b) undersides are red from high levels of anthocyanin pigments.
(c) covered in hairs.
(d) have a large surface area.
(e) have very small surface area.
(f) sharp (nonphotosynthetic) spines.

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

Fluids at rest possess no flow energy. a)- true b)- false

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.