A certain sample carries a current of 4 A when the potential difference is 2 V and a current of 10 A when the potential difference is 4 V. This sample:

Two point charges are arranged as shown. In which region could a third charge +1 C be placed so that the net electrostatic force on it is zero?

A positively charged insulating rod is brought close to an object that is suspended by a string. If the object is repelled away from the rod we can conclude:

The sum of the emf’s and potential differences around a closed loop equals zero, is a consequence of:

A heat of transformation of a substance is:

A consequence of Einstein’s theory of relativity is:

Metal pipes, used to carry water, sometimes burst in the winter because:

Mr. Johnson, a 62-year-old male, presents to the emergency department with complaints of chronic cough, dyspnea, and wheezing. His medical history reveals a long-standing history of tobacco smoking. The healthcare provider suspects a chronic respiratory condition and orders further diagnostic tests.Based on the assessment findings, answer the following multiple-choice questions comparing emphysema and chronic bronchitis. Answer the following question according to the above case study:In the pathophysiology of emphysema, what structural changes in the lungs contribute to airflow limitation?

Mrs. Anderson, a 68-year-old female with a medical history of chronic obstructive pulmonary disease (COPD), is admitted to the medical-surgical unit with exacerbation of respiratory symptoms. She presents with increased dyspnea, cough with purulent sputum, and decreased oxygen saturation levels.Upon assessment, the nurse notes that Mrs. Anderson’s oxygen saturation is 88% on room air. The healthcare provider prescribes oxygen therapy at 2 liters per minute via nasal cannula to maintain oxygen saturation above 90%. Mrs. Anderson is started on the prescribed oxygen therapy.Answer the following question according to the above case study:As part of the discharge plan, what education would you provide to Mrs. Anderson regarding home oxygen therapy management and precautions?

Mr. Johnson, a 62-year-old male, presents to the emergency department with complaints of chronic cough, dyspnea, and wheezing. His medical history reveals a long-standing history of tobacco smoking. The healthcare provider suspects a chronic respiratory condition and orders further diagnostic tests.Based on the assessment findings, answer the following multiple-choice questions comparing emphysema and chronic bronchitis. Answer the following question according to the above case study:Which of the following is a primary risk factor for the development of chronic bronchitis?