Engineering, 07.11.2019 06:31 KenyanaBDavis

Abicyclist leaves from her home at 9 a. m. and rides to a beach 40 mi away. because of a breeze off the ocean, the temperature at the beach remains 60 °f throughout the day. at the cyclist’s home the temperature increases linearly with time, going from 60 °f at 9 a. m. to 80 °f by 1 p. m. the temperature is assumed to vary linearly as a function of position between the cyclist’s home and the beach. determine the rate of change of temperature observed by the cyclist for the following conditions: (a) as she pedals 10 mph through a town 10 mi from her home at 10 a. m.; (b) as she eats lunch at a rest stop 30 mi from her home at noon; (c) as she arrives enthusiastically at the beach at 1 p. m., pedaling 20 mph.

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Answers: 1

Answer

Engineering, 04.07.2019 18:10

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Answers: 2

Answer

Engineering, 04.07.2019 18:20

Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?

Answers: 1

Answer

You know the right answer?

Abicyclist leaves from her home at 9 a. m. and rides to a beach 40 mi away. because of a breeze off...

Questions