Problem: Electric motor:

Many of the limitations of the classic commutator DC motor are due to the need for brushes to press against the commutator. This creates friction. Sparks are created by the brushes making and breaking circuits through the rotor coils as the brushes cross the insulating gaps between commutator sections. Depending on the commutator design, this may include the brushes shorting together adjacent sections and hence coil ends momentarily while crossing the gaps. Furthermore, the inductance of the rotor coils causes the voltage across each to rise when its circuit is opened, increasing the sparking of the brushes. This sparking limits the maximum speed of the machine, as too-rapid sparking will overheat, erode, or even melt the commutator. The current density per unit area of the brushes, in combination with their resistivity, limits the output of the motor. The making and breaking of electric contact also generates electrical noise; sparking generates RFI. Brushes eventually wear out and require replacement, and the commutator itself is subject to wear and maintenance (on larger motors) or replacement (on small motors). The commutator assembly on a large motor is a costly element, requiring precision assembly of many parts. On small motors, the commutator is usually permanently integrated into the rotor, so replacing it usually requires replacing the whole rotor.

What motor components least need replacement and maintenance?
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A: unanswerable

Problem: Turner Classic Movies:

Each August, Turner Classic Movies suspends its regular schedule for a special month of film marathons called "Summer Under the Stars", which features entire daily schedules devoted to the work of a particular actor, with movies and specials that pertain to the star of the day. In the summer of 2007, the channel debuted "Funday Night at the Movies", a block hosted by actor Tom Kenny (best known as the voice of SpongeBob SquarePants). This summer block featured classic feature films (such as The Wizard of Oz, Sounder, Bringing Up Baby, Singin' in the Rain, Mr. Smith Goes to Washington, The Adventures of Robin Hood and 20,000 Leagues Under the Sea) aimed at introducing these movies to new generations of children and their families.

What character was Tom Kenny best known for portraying?
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A: SpongeBob SquarePants

Problem: Universal Studios:

In 1945, the British entrepreneur J. Arthur Rank, hoping to expand his American presence, bought into a four-way merger with Universal, the independent company International Pictures, and producer Kenneth Young. The new combine, United World Pictures, was a failure and was dissolved within one year. Rank and International remained interested in Universal, however, culminating in the studio's reorganization as Universal-International. William Goetz, a founder of International, was made head of production at the renamed Universal-International Pictures Inc., which also served as an import-export subsidiary, and copyright holder for the production arm's films. Goetz, a son-in-law of Louis B. Mayer decided to bring "prestige" to the new company. He stopped the studio's low-budget production of B movies, serials and curtailed Universal's horror and "Arabian Nights" cycles. Distribution and copyright control remained under the name of Universal Pictures Company Inc.

How long did United World Pictures last?
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A: one year

Problem: Capacitor:

The maximum energy is a function of dielectric volume, permittivity, and dielectric strength. Changing the plate area and the separation between the plates while maintaining the same volume causes no change of the maximum amount of energy that the capacitor can store, so long as the distance between plates remains much smaller than both the length and width of the plates. In addition, these equations assume that the electric field is entirely concentrated in the dielectric between the plates. In reality there are fringing fields outside the dielectric, for example between the sides of the capacitor plates, which will increase the effective capacitance of the capacitor. This is sometimes called parasitic capacitance. For some simple capacitor geometries this additional capacitance term can be calculated analytically. It becomes negligibly small when the ratios of plate width to separation and length to separation are large.

If the plate area and separation distance are altered while keeping the amount of dielectric the same, what effect is had on the maximum energy of the capacitor?
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A:
no change of the maximum amount of energy