Experiment 4.docx

Experiment 4: I. Title: Water…. II. Rationale/Concept: As the water leaves the water gun, it is travelling entirely in the horizontal direction, so its total velocity vector can be reduced to horizontal velocity Vx. 𝑥 = 𝑉𝑥 ∗ 𝑡 The distance can be measured but we do not know time. However, we can determine the time using the equation: 𝑌𝑓 = 𝑌𝑎 + 𝑉𝑎𝑦 ∗ 𝑡 +

1 𝑎 ∗ 𝑡2 2 𝑦

Using algebra, we can solve for time and the play results to solve for the velocity. Once velocity is found, we can solve for the pressure using Bernoulli’s Equation. The Bernoulli’s Equation is an important expression that relates pressure, height, and velocity of a fluid at one point along its flow. 1 2 1 𝜌𝑣1 + 𝜌𝑔ℎ1 + 𝑃1 = 𝜌𝑣22 + 𝜌𝑔ℎ2 + 𝑃2 2 2 III. Objectives  

To use Bernoulli’s Equation to find for the pressure of a liquid. Collect, record, and analyse data to determine relationships among variables.

IV. Materials and Reagents a.) Reagents b.) Apparatus and other materials Materials  Water Gun  Masking Tape  Tape Measure

Quantity 1pc 1pc 1pc

V. Methodology 1.) Fill your water gun with water. Leave a small amount of air in the tank. 2.) Mount the water above the table and secure it with a masking tape. Make sure you can still squeeze the trigger and move the pump. 3.) Measure the height of the nozzle above the ground. 4.) Hold the trigger until the water has stop coming out. 5.) Measure the distance between the nozzle and where the water lands. 6.) Repeat the procedure for each trial.