DAY 75

075A: Post-Assessment: Work and Energy. 

On Schoology

When complete, work on review, or lab. 

075B: Kahoot

Finals are Tues-Thurs, with breakfast being the first class each day. 

Friday there is a minimum day, with regular classes per 1-6:

In my class, we will cover the process of obtaining a job, including networking, writing a resume, contacting potential employers, obtaining a work permit, and filling out work related paperwork. All in 38 minutes :-)

#Goals:

SWBAT...

1. ...correctly answer 80% of the review questions

Warm-Up

1. Which of the following statements is true about power?

a. power is a time-based quantity

b. power refers to how fast work is done upon an object

c. powerful people or powerful machines are simply people or machines which always do a lot of work

d. a force is exerted on an object to move it at a constant speed. The power delivered by this force is the magnitude of the force, multiplied by the speed of the object

e. the standard metric unit of power is the Watt

f. if person A and person B do the same job, but person B does it faster, then person A does more work, but person B has more power. 

g. the newton-meter is a unit of power

h. a 60kg boy runs up a 2.0 meter staircase in 1.5 seconds. his power is approximately 80 watts

What can you do to raise your grade? 

CLASSWORK

1. Work energy Power Review

    https://www.physicsclassroom.com/reviews/Work-and-Energy/Work-and-Energy-Review-Answers

    Complete: 1,3,4,6,7,8,9,11-15,18,20,22,23,25,28

NOTE: If you missed earlier reviews, here they are again:

HOMEWORK:

1. Complete the Review. 

2. Need an equation sheet? https://www.flippingphysics.com/uploads/2/1/1/0/21103672/the_table_of_friends_-_algebra_based_physics.pdf You'll want to add the UAM equations on to the sheet, as they aren't there. No notes allowed

3. 074B: Your last graded exam was returned to you Friday - you can make up to four revisions. Show work, and attach the revisions page to your graded exam pages. A copy of the exam is here: https://docs.google.com/document/d/1ZopiFlNWjsTEVp5SbTW-7va_FPM3xh8b90aiDBPvTXg/edit?usp=sharing Due the day of the final

074C: Friday in class I mentioned the significance of December 7th, 1941 in the history of the United States. If you're interested in learning about how politics affects nature, and how the fourth largest lake in the world disappeared in less than a century, here's a great video: https://www.youtube.com/watch?v=AZ5kVH5Ijfg

And, if you'd like to learn about who fired the first shot in Pearl Harbor (it wasn't the Japanese), click below. There's couple REALLY interesting twists to the story, both of which get revealed at the end. 

https://www.youtube.com/watch?v=hcVnByFS7n8

Want some extra credit? Write me a one-two paragraph reflection on each of these videos. And if you want to make it more interesting, come up with a good question or two. Due Monday

Goal: 

SWBAT write a sentence explaining how the combination of the indigo and orange filters creates red light.

WARM-UP

Color perception, like sound perception, is a complex subject involving the disciplines of psychology, physiology, biology, chemistry and physics. When you look at an object and perceive a distinct color, you are not necessarily seeing a single frequency of light. 

1. When you see indigo, which two colors are being combined to create that color?

2. When you see orange, which two colors are being combined to create that color?

Hint: You can use the phet RGB color simulator from yesterday to create those colors, and answer the above questions LINK

CLASSWORK

Review from yesterday:

Color Addition Rules

These demonstrations with the color box illustrate that red light and green light add together to produce yellow (Y) light. Red light and blue light add together to produce magenta (M) light. Green light and blue light add together to produce cyan (C) light. And finally, red light and green light and blue light add together to produce white light. This is sometimes demonstrated by the following color equations and graphic:

R + G = Y

 

R + B = M

 

G + B = C

075A: Reading/Notes "Where Does Color Come From?"

 

1. Check your understanding of these principles by determining which color(s) of light are reflected by the paper and what color the paper will appear to an observer.

What about TRANSPARENT materials?

Transparent materials are materials that allow one or more of the frequencies of visible light to be transmitted through them; whatever color(s) is/are not transmitted by such objects, are typically absorbed by them. The appearance of a transparent object is dependent upon what color(s) of light is/are incident upon the object and what color(s) of light is/are transmitted through the object.

 

2. Express your understanding of this principle by filling in the blanks in the following diagrams.

3. The diagrams depict a sheet of paper being illuminated with white light (ROYGBIV). The papers are impregnated with a chemical capable of absorbing one or more of the colors of white light. In each case, determine which color(s) of light are reflected by the paper and what color the paper will appear to an observer.

4. The appearance of a transparent object is dependent upon which color(s) of light is/are incident upon the object and which color(s) of light is/are transmitted through the object. Express your understanding of this principle by determining which color(s) of light will be transmitted and the color that the paper will appear to an observer.

075B: Color Filters Simulator

Key Question: how can you combine two or more filters to create a specific color? (think of our in class demo - how did orange and indigo filters transmit red light?)

Handout: LINK

Interactive: LINK

HOMEWORK

Complete 075B. 

write a sentence explaining how the combination of the indigo and orange filters creates red light.