Quark-Gluon Plasma This is the fireball created when two nuclei of Gold (Au) were smashed together at nearly the speed of light. The fireball was hot enough.

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Presentation transcript:

Quark-Gluon Plasma This is the fireball created when two nuclei of Gold (Au) were smashed together at nearly the speed of light. The fireball was hot enough to melt protons and neutrons into a substance that is the densest matter ever observed, and is a 100,000 times hotter than the inside of the Sun.

Earth during a solar eclipse

Shark eating shark

Unit 5 Review, Day 1: Speed and Distance-Time Graphs

Unit 5: Motion and Forces LG1: SWBAT define average speed and calculate the average speed of an object. LG2: SWBAT interpret distance-time graphs. LG3: SWBAT define acceleration calculate the acceleration of an object. LG4: SWBAT interpret velocity-time graphs. LG5: SWBAT define Newton’s first law of motion and use it explain the motion of objects. LG6: SWBAT define Newton’s second law of motion and use it to explain the motion of objects. LG7: SWBAT define Newton’s third law of motion and use it to explain the motion of objects.

Speed Speed is the distance traveled divided by the time it takes to travel that distance. The faster something is moving, the less time it takes to travel a certain distance.

d = st d s t

Practice Problems Domonique drives 40 meters in 2 seconds. What is her average speed in the car for these two seconds? Jalayvian runs 400 meters in 50 seconds. What is his average speed over this distance? Lorenzo is running at a speed of 7 m/s. If he runs at this speed for 5 seconds, how many meters will he have run? Bernard jogs at a speed of 5 m/s for a distance of 60 meters. How much time does this take him?

Distance-Time Graphs B A C D

Interpreting points from d-t graphs Each point has y-coordinate and x-coordinate Y-coordinate tells you the total distance object has gone from starting point. X-coordinate tells you the total time that has passed since object started moving. Point C: (7, 8) x = 7 s y = 8 m

Practice At point B, how far had the object traveled, and how much time had passed? After 1 second, how many meters had the object traveled? How many seconds did it take for the object to travel 6 meters? B A C D

Calculating speed from d-t graphs To find object’s speed between two points: Find the change in y-coordinates (y2 – y1) Find the change in x-coordinates (x2 – x1) Divide change in y by change in x

Example Average speed, point A to point B: B A C D

Practice What was the average speed during segment A? What was the average speed during segment B? What was the average speed during segment C? What was the average speed during segment D?

Independent practice time!