How Fast are Barry

Allen’s Fingers Moving?

Name: Julissa Lopez

Abstract

In the CW television series The Flash, a man named Barry

Allen is struck by lightning the same time the particle accelerator is set off.

Because of this he became a metahuman, and has incredible speed. This speed

allows him to go speeds no normal human can go. In one episode, he uses his

speed and his punch to hit a man made out of steel. Reading about this

information, I decided wanted to calculate how fast

his fingers snapped in order to ignite a fire in another episode.

Introduction

In the series, it was said he had to break the sound barrier

and reached 837 mph to punch Girder.

When zoomed in, it is shown that gas he is using is propane. I will find

the heat energy and the velocity at which his fingers are snapping. I will use

the specific heat formula, we learned from Chapter 18, and apply to this.

Afterwards, I will use the velocity equation to find the velocity of his

fingers.

1.

2.

Results

The molar mass of Propane is 44.0952 g/mol, the specific

heat is 1.67 j/ mol, and the temperature where it is flammable is 400C or 743K.

The average room temperature is 298K. Now adding that together we’ll get

(44.10g/mol)(1.67j/mol)(743K-298K)= 32772.915 kg/m2/s-2

This is the thermal energy.

To find the velocity, we are going to use 1/2mv2=Q,

I used the mass of the average male finger is 100g, convert that to kilograms.

We get 0.1kg.

½(.1kg)v2=32772.915kgm2s-2

V2=32772.915kgm2s-2

V= 572.4763313885 m/s

Now I converted this into miles/hr and got 1280.5926m/hr

This means his fingers are snapping at 1280 miles per hour!

Conclusion

The physics would be possible if superhumans existed in the

real word, however, I realized something a bit later on after my calculation. I

realized instead of thermal energy ignition, it would actually be an electrical

ignition. He isn’t snapping his fingers in that rate, but fast enough to

activate the speed force around him.