INVESTIGATING THE TERMINAL VELOCITY OF WATER DROPLETS

Slides:

Advertisements

Similar presentations

Resistance in Fluid Systems

Advertisements

8th Grade Investigations 5-8 Force and Motion

Newton’s 1st Law Lab Activities

FORCES. FORCE: The cause of motion The cause is either a –Push or a –Pull.

- Prepared by Shakil Raiman

Physical Science PS1 Force and Motion. EALR 4: Physical Science Big Idea: Force and Motion (PS1) Core Content: Measurement of Force and Motion In prior.

WHAT IS THE EFFECT OF AIR RESISTANCE ON A FALLING OBJECT? BY: SAM HATALA F AIR RESISTANCE mg.

Drag The trajectory of an ink droplet stream ejecting horizontally out of an inkjet printer is photographed as shown below. It is counterintuitive that.

DISCLAIMER This Presentation may contain Copyrighted Material, DO NOT DISTRIBUTE.

Section 6.2 Using Newton’s Laws

Gravity and Freefall. Gravity pulls on all objects on the Earth, trying to pull them to the center of the Earth. We measure the amount of pull on your.

Motion. Motion Motion is the change of an object’s position over time Motion is the change of an object’s position over time When we say something has.

Convection Current Lab. I. Title I. Title: Convection Currents.

Unit 01 “Forces and the Laws of Motion” Introduction to Forces

Proportion. Galileo Was unable to measure the acceleration of gravity accurately. a = g = 9.80 m/s² Discovered Change in velocity is proportional to the.

Plant and Mammalian Tissue Culture Counting Cells and Experimental Design.

Formative Assessment. 1. Water flows at m/s down a pipe with an inner diameter of 1.27 cm. If the pipe widens to an inner diameter of 5.08 cm, what.

EQUIVALENT FRACTIONS. Math Vocabulary Equivalent fraction(s): Fractions that are EQUAL to each other, even though they look different.

Biuret Test (Write in glossary):

Unit 1 Physics on the go Topic 2 Materials: Viscosity.

Put the objects in order according to which has the largest drag force on it.

Terminal Velocity Predicting the rate an object will fall through air depending on mass, cross sectional area and other factors.

Force, Motion, Dynamics, and Fluids.  A system of objects that are not moving with respect to one another. Used to determine the motion of an object.

MEASUREMENT OF VELOCITY AND ACCELERATION Velocity = distance over 10 spaces multiplied by 5. Use a = (v-u)/t to find acceleration Precautions Dust track.

Monday, September 24th Science Starter: 1. What does the word phenomenon mean? 2. Now use the word phenomenon in a sentence to describe the whirligig.

Chapter 1 Section 2 Scientific Methods. What are Scientific Methods What do Scientists use scientific methods for? To answer questions and to solve problems.

1 Optimization Physical Sciences, Engineering Lesson 4.6.

AIRPORT SURVEYS.

Gravity The force of attraction between objects that is due to their masses The force of attraction between objects that is due to their masses All matter.

Gravitational Force  Gravity= a force of attraction between objects, “pulls” objects toward each other  Law of universal gravitation= all objects in.

Restoring Tumorous MRI Brain Images

Thermal Energy EQ: How does heat energy impact the way molecules move in a given substance?

How to forecast solar flares?

How to use Newton’s Second Law

The Science Behind Two Liter Bottle Rockets

Riding the Waves Learning Perfect Pitch through the Shapes of Sound

Elasticity and Oscillations

33 (6 outlines) -> 27.

An Analysis of Graphical Representations of Bowling

Effect of Angles and Time on Different Styles of Dance

Analyzing Period of Simple Pendulum

Lecture 12 The Importance of Accurate Solar Wind Measurements

Playland Project 2-2 Sirada, Simon, Rosemary

Ian Dohm: Cary Academy SummerVentures in Science and Math at ASU 2008

Roller Coasters and Science??

Mixtures: A Simple Experiment

ONLY SKIN DEEP: Analysis of Cosmetic Products

Hidden Communications: The Effectiveness of Steganography

Terminal Velocity.

Precipitation I.

Solve the following equation for t:

Finding The Optimal Position For Tennis Serving

Special vs. General Relativity

Newton’s 1st Law Lab Activities

Particle (s) motion.

Examples of Projects from Previous years

April 18, 2018 Mental Math…be ready. You need:

ANALYZING SHOE PRINTS IN A CRIME SCENE

ATCM 6317Procedural Animation

Procedural Animation Lecture 8: Particle systems

April 12, 2018 Mental Math…be ready. You need:

Fun with Forensics.

There are a total of 6/3 or 2 whole rectangles

April 11, 2018 Mental Math…be ready. You need:

Motion in Two Dimensions

Chapter 3 Gravity.

Robert Andrews Millikan

Using Newton’s Laws.

Acceleration - Newton’s

Visual Abstract Submission Information

Presentation transcript:

INVESTIGATING THE TERMINAL VELOCITY OF WATER DROPLETS Haoru Liu : hallliu000@gmail.com East Chapel Hill High School Summer Ventures in Science and Math 2009 Dr. Tashakkori, Mr. Miles, Ms. Shrestha

What is terminal velocity? Equilibrium state caused by equal forces of drag and gravity Easily predictable for small droplets-Stoke’s law Not so for larger droplets.

Previous methods Using a charged droplet to induce current in loops (Gunn et al. 1948) Developing a formula based on observations (Best 1950)

Purpose To develop a simple yet accurate way to measure terminal velocity Suitable for use in a general classroom setting

Methods White background illuminated by blue projector at the bottom of a high drop Camera placed on top of projector, aimed at white background White paper placed on ground in front of background

Methods (cont.) Pipette used – subdivided into 10μL segments with scale Tip of pipette cut and widened for larger drops Droplets were colored water

Methods (cont.) Higher frame rate used on camera (120fps) Frames extracted using Avidemux, processed with ImageJ Velocity found by multiplying streak length by frame rate

Results Volume (μL) Streak length (in) Velocity (m/s) 20 2.85 8.69 30 2.92 8.90 40 3.06 9.32 50 3.11 9.48 60 3.14 9.57 70 3.24 9.87 80 3.28 10.0

Results (cont.)

Conclusions Method suitable Streak measurement somewhat tricky Effects of perspective

Future Work Replication with standard 30fps camera Replication with >10000fps camera Effect of barometric pressure

Acknowledgements Dr. Rahman Tashakkori Jere Miles Biva Shrestha Alex Chin