![Essential University Physics: Volume 1 (3rd Edition)](https://www.bartleby.com/isbn_cover_images/9780321993724/9780321993724_largeCoverImage.gif)
Concept explainers
Biomechanical engineers have developed micromechanical devices for measuring blood flow as an alternative to dye injection following angioplasty to remove arterial plaque. One experimental device consists of a 300-μm-diameter, 2.0-μm-thick silicon rotor inserted into blood vessels. Moving blood spins the rotor, whose rotation rate provides a measure of blood flow. This device exhibited an 800-rpm rotation rate in tests with water flows at several m/s. Treating the rotor as a disk, what was its
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter 11 Solutions
Essential University Physics: Volume 1 (3rd Edition)
Additional Science Textbook Solutions
Lecture- Tutorials for Introductory Astronomy
College Physics: A Strategic Approach (3rd Edition)
Essential University Physics (3rd Edition)
Physics: Principles with Applications
College Physics
The Cosmic Perspective (8th Edition)
- Most gasoline engines in today's automobiles are belt driven. This means that the crankshaft, a rod which rotates and drives the pistons, is timed to the camshaft, the mechanism which actuates the valves, by means of a belt. Starting from rest, assume it takes t = 0.0760 s for a crankshaft with a radius of r1 = 4.75 cm to reach 1350 rpm. If the belt does not stretch or slip, calculate the angular acceleration a2 of the larger camshaft, which has a radius of r2 = 9.50 cm, during this time period. a2 = rad/s?arrow_forwardA high-speed drill reaches 2410 rpm in 0.220 s, starting from rest. What is the drill's angular acceleration (in rad/s/s)? Through how many revolutions does the drill turn during this first 0.220 s?arrow_forwardA fan rotating with an initial angular velocity of 1000 rev/min is switched off. In 2 seconds, the angular velocity decreases to 200 rev/min. Assuming the angular acceleration is constant, how many revolutions does the blade undergo during this time?arrow_forward
- Torque You are playing with the masking tape that came in your lab box. This tape has a thickness that is not small compared to the radius. You measure it and it has an outer radius of 6.40 cm and an inner radius of 3.95 cm. You weigh the tape roll and find that it has a mass of 79.5 g. Now you roll the tape like you would a hoop (Rolling tape 1 (00:05)). The video illustrates the idea of the motion - please do NOT use it for numerical values. You find that the tape starts from rest, and has a torque applied when you push on it with your finger. You push on the outer edge (perpendicular to the radial direction). This causes the tape to accelerate. After 0.75 seconds, you find that the tape has an angular velocity of 53.0 rpm (rotations / minute). What is the Force you applied to the tape to start the rotation? Your answer should have the following: 2 Decimal Places Correct SI Units Appropriate Signs for Vector quantity answers Answers must be in the following format: Written out and…arrow_forwardA high-speed drill reaches 2300 rpm in 0.52 s. What is the drill's angular acceleration? Through how many revolutions does it turn during this first 0.52 s?arrow_forwardA bicycle has a pedal gear ( front gear) with a 9 inch diameter. The rear gear has a 3 inch diameter, and a wheel with a 32 inch diameter. If I can pedal at 52 rpm ( rotations per minute) How fast am I going in miles per hour?arrow_forward
- Jennifer decided to install a ceiling fan in the master bedroom. After a laborious installation, she turns on the ceiling fan and lets it run for 20 seconds until it reaches an angular speed of 120 rev/min. She then turns off the fan and it comes to a gradual stop in 40 s. Having just taken a short physics course, she goes an calculates the number of revolutions that the ceiling fan turns. What was the number of revolutions that the ceiling fan turned?arrow_forwardA wind turbine rotates at 15.8 rpm and has an angular acceleration of 0.0502 rad/s2. If the wind turbine takes 33.0 s to come to a complete stop, how many revolutions will this take?arrow_forwardThe corner of a plate selected as the origin is also the axis of rotation about the z-axis as shown in the figure below. The dimensions of the plate are x = 31 cm, y = 12 cm and thickness = 3.0 cm. The plate has a density of 2,575 kg/m3. Two 6 cm diameter holes are drilled through the plate. The location of the center of the first hole is at x1 = 20 cm and y1 = 4.0 cm and location of the center of the second hole is at x2 = 4 cm and y2 = 6.3 cm. What is the mass moment of inertia for the plate? (Enter your answer and round to 4 decimal places of a kg·m2arrow_forward
- At t = 0s a grinding wheel has an angular velocity of 24.0 rad/s. It has a constant angular acceleration of 30.0 rad/s2 until a circuit breaker trips at t = 2.3 s. From then on it coasts to a stop over the next 10.0 seconds at constant angular acceleration. Through what total angle did the grinding wheel rotate? (Give your answer in radians.)arrow_forwardThe crankshaft in a race car goes from rest to 3000 rpm in 2.0 seconds. How many revolutions does it make while reaching 3000 rpm?arrow_forwardA cooling fan, initially rotating at 850 rpm is turned off, and then turns through 1350 complete revolutions before coming to a stop. Assume the angular acceleration of the fan was constant as it came to a stop. (a) What was the angular acceleration of the fan, in units of rad/s2. (b) How long did it take (in seconds) for the fan to come to a stop?arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337553278/9781337553278_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780321820464/9780321820464_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9780134609034/9780134609034_smallCoverImage.gif)