Problem: Please answer a question about the following article about Vacuum:
The SI unit of pressure is the pascal (symbol Pa), but vacuum is often measured in torrs, named for Torricelli, an early Italian physicist (16081647). A torr is equal to the displacement of a millimeter of mercury (mmHg) in a manometer with 1 torr equaling 133.3223684 pascals above absolute zero pressure. Vacuum is often also measured on the barometric scale or as a percentage of atmospheric pressure in bars or atmospheres. Low vacuum is often measured in millimeters of mercury (mmHg) or pascals (Pa) below standard atmospheric pressure. "Below atmospheric" means that the absolute pressure is equal to the current atmospheric pressure.
What is another often used options to measure vacuum?
A: barometric scale
Problem: Please answer a question about the following article about Carnival:
Carnival celebrations, usually referred to as Mardi Gras (Fat Tuesday in French), were first celebrated in the Gulf Coast area, but now occur in many states. Customs originated in the onetime French colonial capitals of Mobile (now in Alabama), New Orleans (Louisiana) and Biloxi (Mississippi), all of which have celebrated for many years with street parades and masked balls. Other major American cities with celebrations include Washington, DC; St. Louis, Missouri; San Francisco; San Diego; Galveston, Texas; and Miami, Pensacola, Tampa, and Orlando in Florida.
Where was Mardi Gras first celebrated?
A: Gulf Coast area
Problem: Please answer a question about the following article about Southampton:
The importance of Southampton to the cruise industry was indicated by P&O Cruises's 175th anniversary celebrations, which included all seven of the company's liners visiting Southampton in a single day. Adonia, Arcadia, Aurora, Azura, Oceana, Oriana and Ventura all left the city in a procession on 3 July 2012.
Which of the seven P&O cruise liners has a name that begins with "V"?
A: Ventura
Problem: Please answer a question about the following article about Capacitor:
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 sort of current is induced when the capacitance of a capacitor is altered?
A:
AC current