Which option identifies a reasonable sub-story for the following user story? As a first-time user, I want to purchase organic jams as gifts to send to friends.

As a first-time user, I want to purchase organic jams as gifts to send to friends for birthdays.

As a first-time user, I want to purchase organic jams and ship them to other addresses.

As a first-time user, I want to purchase 16 jars of organic jams.

As a first-time user, I want to purchase organic jams as holiday presents.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Which of the following is the most important advantage of a large field of view? a. allows larger areas to be examined b. relieves eyestrain c. minimizes parallax errors. d. increases precision in proportion to the in- crease in field of view

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2