CK-12 Physical Science - For Middle School

15.1. Pressure of Fluids http://www.ck12.org FIGURE 15.10 How does Bernoulli’s law explain each of these examples? see http://sc ...

http://www.ck12.org Chapter 15. Fluid Forces Lesson Review Questions Recall Define pressure. What is the SI unit for pressure? ...

15.2. Buoyancy of Fluids http://www.ck12.org 15.2 Buoyancy of Fluids Lesson Objectives Describe the nature of buoyant force. St ...

http://www.ck12.org Chapter 15. Fluid Forces Buoyant Force Buoyancyis the ability of a fluid to exert an upward force on any obj ...

15.2. Buoyancy of Fluids http://www.ck12.org Because of buoyant force, objects seem lighter in water. You may have noticed this ...

http://www.ck12.org Chapter 15. Fluid Forces FIGURE 15.14 The substances pictured here float in a fluid because they are less de ...

15.2. Buoyancy of Fluids http://www.ck12.org FIGURE 15.15 Archimedes’ law explains why a heavy ship floats. Its shape causes it ...

http://www.ck12.org Chapter 15. Fluid Forces 15.3 References Joe Shlabotnik. http://www.flickr.com/photos/joeshlabotnik/1856962 ...

http://www.ck12.org CHAPTER 16 Work and Machines Chapter Outline 16.1 Work 16.2 MACHINES 16.3 SIMPLEMACHINES 16.4 COMPOUNDMACHIN ...

http://www.ck12.org Chapter 16. Work and Machines 16.1 Work Lesson Objectives Define work, and state how to calculate it. Expla ...

16.1. Work http://www.ck12.org Not all force that is used to move an object does work. For work to be done, the force must be ap ...

http://www.ck12.org Chapter 16. Work and Machines FIGURE 16.3 Weight lifters do more work when they move weights a longer distan ...

16.1. Work http://www.ck12.org FIGURE 16.4 Which way of removing leaves would take less effort on your part? In this equation, w ...

http://www.ck12.org Chapter 16. Work and Machines Work=Power×Time For example, if you use a 2000-watt hair dryer for 30 seconds, ...

16.1. Work http://www.ck12.org Power is a measure of the amount of work that can be done in a given amount of time. The SI unit ...

http://www.ck12.org Chapter 16. Work and Machines 16.2 Machines Lesson Objectives Explain how machines help us do work. Define ...

16.2. Machines http://www.ck12.org How Machines Help Us Do Work Amachineis any device that makes work easier by changing a force ...

http://www.ck12.org Chapter 16. Work and Machines FIGURE 16.9 Both of these machines increase the dis- tance over which force ap ...

16.2. Machines http://www.ck12.org KQED: Exoskeletons Walk Forward An exoskeleton suit may seem like science fiction, turning or ...

http://www.ck12.org Chapter 16. Work and Machines FIGURE 16.11 A ramp is a machine because it makes work easier by changing a fo ...