Senior Movie PresentationGoal: Find an approximately 1 minute to 2 minute scene from

movie and describe the science/physics seen in a scene from a

movie. You can describe how something is done, why it is

possible or even why it is impossible.

Requirements

1) Scene must school appropriate.

Physics concept appropriately demonstrated in the scene.

Include link you short clip in the

presentation (1-2 minutes)

2) Present your scene and describe in a Power Point or

other presentation software

Include appropriate definitions.

Include appropriate formulas.

Include appropriate Diagrams

Explain how the concepts apply to the scene.

Example 1 What Wrong with this picture?

Star Wars: Blowing up the Death Star

You see the explosion and you hear the explosion at the same time?

What would be the time difference between the light and the Noise?

LightElectromagnetic Wave

Oscillating Electric and Magnetic Field

Travel at the speed of light

𝑣𝑚𝑎𝑥 = 𝑐 = 3 ∗ 108m/s

𝒗 = 𝒇𝝀

Classified by Frequency or Wavelength

SoundMechanical Wave

Requires Medium to travel

Longitudinal WavesMedium moves parallel to the direction of

a wave

Wave Direction

Particle Direction

Speed of sound depends on properties of the medium

Solids: ~3000 – 5000m/sWater: ~1440 – 1560 m/sAir = 331+0.6TVacuum: 0 m/s

𝒗 = 𝒇𝝀 Frequency = PitchDetermined by source of Sound WaveHuman range of hearing 20Hz to 20000 Hz

What would be the time difference between the light and the Noise?

If the Millennium Falcon is 5000 km from the death star when it explodes, what is the difference in time from when they see the explosion and when they hear the explosion?

∆𝑡 = 𝑡𝑠𝑜𝑢𝑛𝑑 − 𝑡𝑙𝑖𝑔ℎ𝑡

𝑡 =𝑑

𝑣

𝑡𝑙𝑖𝑔ℎ𝑡 =5 ∗ 106

3 ∗ 108= 0.016𝑠

𝑡𝑠𝑜𝑢𝑛𝑑 =5 ∗ 106

0=? ? ? ? ? ?

Sound Cannot Travel in Space, it requires a medium and space is a vacuum.

Therefore you would never hear the sound!

Example1 Spies Like Us: Measuring the G Force threshold.

1) Define G-Force Threshold

2) How is it measured?

3) Explain Centripetal Acceleration

4) Why does their face deform?

g-force: Measurement of the type of force per unit mass that causes a perception of weight.

A g-force of 1 g equal the force required to accelerate a mass the conventional value of gravitational acceleration on Earth,1 g, of about 9.8 m/s2

Human tolerances depend on• magnitude of the gravitational force • length of time it is applied• direction it acts• posture of the body.

People are tested large centrifuges to simulate

a feeling of gravity

The change in direction is a change in velocity

which simulates large acceleration.

r = 7.0mV=18.5 m/s

How many g’s would a person feel?

𝑎 =18.5 2

7= 48.9

m

s2

G’s=48.9

9.8= 4.98 = 5𝑔′𝑠

Δv=v2-v1