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Capacitors, especially ceramic capacitors, and older designs such as paper capacitors, can absorb sound waves resulting in a microphonic effect. Vibration moves the plates, causing the capacitance to vary, in turn inducing AC current. Some dielectrics also generate piezoelectricity. The resulting interference is especially problematic in audio applications, potentially causing feedback or unintended recording. In the reverse microphonic effect, the varying electric field between the capacitor plates exerts a physical force, moving them as a speaker. This can generate audible sound, but drains energy and stresses the dielectric and the electrolyte, if any.
What is it called when a changing electric field existing between the conductive plates of a capacitor physically moves them?
A: the reverse microphonic effect

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Israeli cuisine includes local dishes as well as dishes brought to the country by Jewish immigrants from the diaspora. Since the establishment of the State in 1948, and particularly since the late 1970s, an Israeli fusion cuisine has developed. Roughly half of the Israeli-Jewish population attests to keeping kosher at home. Kosher restaurants, though rare in the 1960s, make up around 25% of the total as of 2015[update], perhaps reflecting the largely secular values of those who dine out. Hotel restaurants are much more likely to serve kosher food. The non-kosher retail market was traditionally sparse, but grew rapidly and considerably following the influx of immigrants from Eastern Europe and Russia during the 1990s. Together with non-kosher fish, rabbits and ostriches, pork—often called "white meat" in Israel—is produced and consumed, though it is forbidden by both Judaism and Islam.
Kosher restaurants make up what percent of total restaurants?
A: 25%

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The current–voltage characteristic of an LED is similar to other diodes, in that the current is dependent exponentially on the voltage (see Shockley diode equation). This means that a small change in voltage can cause a large change in current. If the applied voltage exceeds the LED's forward voltage drop by a small amount, the current rating may be exceeded by a large amount, potentially damaging or destroying the LED. The typical solution is to use constant-current power supplies to keep the current below the LED's maximum current rating. Since most common power sources (batteries, mains) are constant-voltage sources, most LED fixtures must include a power converter, at least a current-limiting resistor. However, the high resistance of three-volt coin cells combined with the high differential resistance of nitride-based LEDs makes it possible to power such an LED from such a coin cell without an external resistor.
How are LEDs similar to other diodes?
A: the current is dependent exponentially on the voltage

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The practice of using dogs and other animals as a part of therapy dates back to the late 18th century, when animals were introduced into mental institutions to help socialize patients with mental disorders. Animal-assisted intervention research has shown that animal-assisted therapy with a dog can increase social behaviors, such as smiling and laughing, among people with Alzheimer's disease. One study demonstrated that children with ADHD and conduct disorders who participated in an education program with dogs and other animals showed increased attendance, increased knowledge and skill objectives, and decreased antisocial and violent behavior compared to those who were not in an animal-assisted program.
Children who have ADHD or conduct disorders respond better when what is a part of their treatment plan?
A:
dogs