Because of their net negative charge, bacteria are easily attracted to and adhere to surfaces on which they can proliferate, forming bacterial biofilms, thin films of bacteria coating the surface. Bacterial biofilms are especially problematicon indwelling medical devices (IMDS), which are devices inserted into a patient and include catheters, heart valves, and artificial joints. Contaminated IMDS are the most common source of infection in humans. A number of mitigationmethods are in use today, including antibacterial graphene oxide coatings and the use of electric fields and surface charges to repel bacteria.In a hospital operating room, due to an unexpected complication in the surgical procedure, and in violation of protocol, a catheter that was removed from its sterile pouch before the complication is being used hours after being exposed tothe air in the room. The catheter, which can be modeled as an insulating cylindrical shell with a length { = 40.0 cm, inner radius a = 2.00 mm and outer radius b = 2.75 mm, is coated with a thin bacterial film. The film has resulted in auniform charge density of -0.900 µC/m2 on the outer surface of the catheter. Calculate the magnitude (in N/C) and direction of the electric field generated near the centerpoint of the length of the catheter by the distribution of biofilm ata radial distance of 1.00 mm, 2.50 mm, and 5.00 mm from the central axis of the catheter. (Assume the positive direction is outward. Indicate the direction with the signs of your answers.)(a) 1.00 mmV N/C(b) 2.50 mmV N/C(c) 5.00 mm-5.59e4V N/CWhat If? After a long time, biofilm can also form on the inner surface of the catheter. If a film of charge density -0.300 µC/m2 has formed on the inner surface of the catheter, what is now the magnitude (in N/C) and direction of theelectric field at a distance of 1.00 mm, 2.50 mm, and 5.00 mm from the central axis of the catheter? (Assume the positive direction is outward. Indicate the direction with the signs of your answers.)(d) 1.00 mmV N/C(e) 2.50 mmN/C(f) 5.00 mmN/C

Answered: Image /qna-images/answer/669cc896-e100-40f3-a8ec-c02a498a5b98.jpg

negative a bacteria ar easily a to and they can prolirerate, bacteria coating are especiany on indwelling medical devices (IMDS), which are devices inserted into a patient and include catheters, heart valves, and artificial joints. Contaminated IMDS are the most common source of infection in humans. A number of mitigation methods are in use today, including antibacterial graphene oxide coatings and the use of electric fields and surface charges to repel bacteria. In a hospital operating room, due to an unexpected complication in the surgical procedure, and in violation of protocol, a catheter that was removed from its sterile pouch before the complication is being used hours after being exposed to the air in the room. The catheter, which can be modeled as an insulating cylindrical shell with a length e= 40.0 cm, inner radius a = 2.00 mm and outer radius b = 2.75 mm, uniform charge density of -0.900 uC/m? on the outer surface a radial distance of 1.00 mm, 2.50 mm, and 5.00 mm from the central axis of the catheter. (Assume the positive direction is outward. Indicate the direction with the signs of your answers.) coated with a thin bacterial film. The film has resulted in a the catheter. Calculate the magnitude (in N/C) and direction of the electric field generated near the centerpoint of the length of the catheter by the distribution of biofilm at (a) 1.00 mm V N/C (b) 2.50 mm v N/C (c) 5.00 mm -5.59e4 V N/C What If? After a long time, biofilm can also form on the inner surface of the catheter. If a film of charge density -0.300 uC/m? has formed on the inner surface of the catheter, what is now the magnitude (in N/C) and direction of the electric field at a distance of 1.00 mm, 2.50 mm, and 5.00 mm from the central axis of the catheter? (Assume the positive direction is outward. Indicate the direction with the signs of your answers.) (d) 1.00 mm V N/C (e) 2.50 mm N/C (f) 5.00 mm N/C

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter18: Electric Charge And Electric Field

Section: Chapter Questions

Problem 9CQ: Figure 18.43 shows the charge distribution in a water molecule, which is called a polar molecule...