Ahot pipe 10.16 cm od and 50. long passes through a 40 c engines room. the temperature of the pipe surface is close to 150c. the pipe has a leyer of 2.45cm thick of polyurethane foam (kf=0.04w/m-k), and a protecting 2mm thick clean polished aluminium foil (kf=204.2 w/m-k, e=0). the heat transfer coefficient by convection to the air is 10 w/m2-k:

a) what is the total heat rate loss?

b) what is the temperature of the external aluminium surface?

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).