Quick Question: An abstract is a brief summary of a research article, thesis, review, conference proceeding, or any in-depth analysis of a particular subject and is often used to help the reader quickly ascertain the paper's purpose. When used, an abstract always appears at the beginning of a manuscript or typescript, acting as the point-of-entry for any given academic paper or patent application. Abstracting and indexing services for various academic disciplines are aimed at compiling a body of literature for that particular subject.

Answer this question based on the passage: what is an abstract in a scientific journal article?
My answer: To answer the above question, the relevant sentence is: An abstract is a brief summary of a research article, thesis, review, conference proceeding, or any in-depth analysis of a particular subject and is often used to help the reader quickly ascertain the paper's purpose. The answer is a brief summary of a research article , thesis , review , conference proceeding , or any in - depth analysis of a particular subject and is often used to help the reader quickly ascertain the paper 's purpose.

Quick Question: The sinoatrial node (SA node), also known as sinus node, is a group of cells located in the wall of the right atrium of the heart. These cells have the ability to spontaneously produce an electrical impulse (action potential; see below for more details), that travels through the heart via the electrical conduction system (see figure 1) causing it to contract. In a healthy heart, the SA node continuously produces action potential, setting the rhythm of the heart and so is known as the heart's natural pacemaker. The rate of action potential production (and therefore the heart rate) is influenced by nerves that supply it.

Based on this passage, where is the sa node located in the heart?
My answer: The relevant sentence in the passage is: The sinoatrial node (SA node), also known as sinus node, is a group of cells located in the wall of the right atrium of the heart. The answer is the wall of the right atrium.

Quick Question: Officially, the widest tornado on record is the El Reno, Oklahoma tornado of May 31, 2013 with a width of 2.6 miles (4.2 km) at its peak. This is the width found by the National Weather Service based on preliminary data from University of Oklahoma RaxPol mobile radar that also sampled winds of 296 mph (476 km / h) which was used to upgrade the tornado to EF5. However, it was revealed that these winds did not impact any structures, and as a result the tornado was downgraded to EF3 based on damage. However, another possible contender for the widest tornado as measured by radar was the F4 Mulhall tornado in north-central Oklahoma which occurred during the 1999 Oklahoma tornado outbreak. The diameter of the maximum winds (over 110 mph ( 49 m / s) ) was over 5,200 feet (1,600 m) as measured by a DOW radar. Although the tornado passed largely over rural terrain, the width of the wind swath capable of producing damage was as wide as 4 mi (6.4 km).

Where did the widest tornado on record occur?
My answer:
To answer the question, consider the following: Officially, the widest tornado on record is the El Reno, Oklahoma tornado of May 31, 2013 with a width of 2.6 miles (4.2 km) at its peak. The answer is El Reno , Oklahoma.