"Frances sells bottled water from a small stand by the beach. On the last day of summer vacation, many people are on the beach, and Frances realizes that she can make a lot more money this day if she hires someone to walk up and down the beach selling water. She finds a college student named Dmitri and makes him the following offer: They'll each sell water all day and split their earnings (revenue minus the cost of water) equally at the end of the day. Frances knows that if they both work hard, Dmitri will earn $80 on the beach and Frances will earn $160 at her stand, so they will each take home half of their total revenue: $80+$1602=$120 . If Dmitri shirks, he'll generate only $50 in earnings. Frances does not know that Dmitri estimates his personal cost (or disutility) of working hard as opposed to shirking at $20. Once out of Frances's sight, Dmitri faces a dilemma: work hard (put in full effort) or shirk (put in low effort)."

Remaining part of question:

In terms of Dmitri's total utility, it is worse for him to .

Taking into account the loss in utility that working hard brings to Dmitri, Sondra and Dmitri together better off if Dmitri works hard instead of shirking

1. Put in more effort

2. Would be

Explanation:

1. Dmitri puts his personal cost at $20 if he shirks, an amount that is implies $80-$20=$60

he would be having over half of their total revenue.

2.

Yes, if they both work hard, Dmitri will earn $80 on the beach and Frances will earn $160 at her stand, so they will each take home half of their total revenue: $80/2+$160/2=$120 . However, if Dmitri fails to work hard all of them would receive lesser returns.

sound is invisible, but sometimes we can feel it. when a kettle-drum is thumped with a stick that time the tight drum skin moving up and down very quickly for some time and then it pumped sound waves into the air. loudspeakers also work in a similar manner.

components of a speaker:

electromagnet

in order to translate an electrical signal into an audible sound, an electromagnet is used in looudspeakers

  suspension

suspension is used to   center the voice coil in the gap of the magnet and it exerts a restoring force to keep it there. suspension is used to limits the maximum mechanical excursion of the diaphragm and voice coil.

voice coil

voice coil is a coil of wire which is attached to the apex of a loudspeaker cone. it provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

cone

in a   loudspeaker, a   thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap due to which it vibrates   and produced sound. it is known as diaphragm and it can also be called a cone, though not all speaker diaphragms are cone-shaped.

surround

surround is also known as front suspension. surround is used to join the cone to the chassis. together with the suspension it controls the cone excursion, and it is also used to   determine how energy which is   travelling through the cone is absorbed, and how the speaker limits when it reaches the ends of its travel.

dustcap

dustcap is used to protect the voice coil from dust and dirt. it is a part of the cone.

how speaker work

the outer part of the cone is fastened to the outer part of the loudspeaker's circular metal rim. the inner part is fixed to   voice coil that sits just in front of a permanent magnet . when loudspeaker is hooked up to a stereo, electrical signals feed through the speaker cables into the coil. it will convert the coil into an electromagnet magnet . when electricity flows back and forth in the cables, the electromagnet either repels or attract the permanent magnet. this moves the coil back and forth, and it pull and push the loudspeaker cone. like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.in this way loudspeakers works.

answer; functional fixedness;