Washer Thermal Energy Lab

Summary

In the washer heat flow lab, the experiment explores the impact of mass on heat flow. Two setups are conducted: one with two and six washers, and another with four washers each. A hot plate heats the washers, and water temperatures are measured before and after immersion. The first experiment uses equal water volumes, while the second varies the water amount. The lab is designed to be simple, engaging for students, and effective in demonstrating the principles of heat transfer.

Takeaways

• 🔬 The lab experiment focuses on observing how mass affects heat flow.
• 🧪 Two separate experiments are conducted: one with two and six washers, and another with four washers in each setup.
• ⚠️ It's advised to use a more durable string for tying washers to avoid untying issues.
• 📏 The washers are spaced out on a pencil to ensure they don't touch the bottom of the beaker.
• 🌡️ A hot plate is used to heat the washers, set at 250 degrees Fahrenheit.
• 📝 The experiment involves labeling the beakers according to the washers' quantity they contain.
• 💧 In the first experiment, equal amounts of water (100 milliliters) are used for both systems.
• 📉 The initial and final temperatures of the water are recorded after placing the washers.
• 🔄 For the second experiment, different amounts of water are used while keeping the number of washers constant.
• 📊 Results are compared to analyze the impact of mass on heat flow in the systems.
• 📚 The lab is designed to be simple to set up and conduct, making it an effective educational tool.

Q & A

What is the main objective of the washer heat flow lab?

The main objective of the washer heat flow lab is to observe how mass affects heat flow.

How many different experiments are set up in the lab?

Two different experiments are set up in the lab.

What is the difference between the two experiments in terms of washers used?

In the first experiment, two and six washers are used, while in the second experiment, four washers are used for both systems.

What type of string is used in the video, and why is it not recommended?

Shiny pink string is used in the video, but it is not recommended because it unties very easily.

What is the recommended alternative to the string used in the video?

A different type of string that is a little more rough is recommended, as it helps the knots stay in place more easily.

How are the washers arranged in the experiment?

The washers are tied to a pencil with a little bit of space in between each washer.

What is the purpose of not letting the washers touch the bottom of the beaker?

The washers are not allowed to touch the bottom of the beaker to prevent tangling when multiple groups are heated at once.

What is the initial temperature of the water in both systems during the first experiment?

The initial temperature of the water in both systems is not specified in the script, but it is measured before placing the washers.

How does the amount of water in the systems differ between the first and second experiments?

In the first experiment, the same amount of water (100 milliliters) is used in each system, while in the second experiment, different amounts of water (50 milliliters and 200 milliliters) are used.

What is the purpose of comparing the final temperatures in the experiments?

The purpose of comparing the final temperatures is to analyze how the mass of the washers affects the heat flow and the temperature change in the water.

Who is the target audience for this lab, and why is it a good choice for them?

The target audience for this lab is students. It is a good choice for them because it is easy to set up and conduct, and it provides a practical way to discuss the concept of how mass affects heat flow.

Outlines

00:00

🔬 Washer Heat Flow Lab Setup

The video script describes a scientific experiment conducted in the washer heat flow lab. The main objective is to investigate the impact of mass on heat flow. Two distinct experiments are planned: one using two and six washers, and the other using four washers in two separate setups. The narrator advises against using shiny pink string due to its tendency to untie easily, suggesting a rougher alternative for better knot retention. The setup involves tying groups of washers to a pencil with some space between them, which is demonstrated in the video. The washers are then heated using a hot plate set at 250 degrees, with separate beakers labeled for different washer configurations. The washers are suspended in the water to prevent them from touching the bottom, allowing for efficient multitasking. The first experiment compares the final temperatures when the same amount of water (100 milliliters) is used with different numbers of washers (two versus six). The second experiment varies the water volume (50 milliliters versus 200 milliliters) while keeping the number of washers constant (four in each system). The initial and final temperatures of the water are recorded to analyze how mass influences heat flow.

Keywords

💡Washer

In the context of the video, a 'washer' refers to a small, flat, usually round metal disc that is used in conjunction with a nut and bolt to distribute the load and prevent damage to the material being fastened. In the experiment, washers are used as the objects whose heat flow properties are being studied. The video mentions using two and six washers in the first experiment and four washers in the second, highlighting the role of mass in heat transfer.

💡Heat flow

Heat flow is the movement of heat energy from one body or substance to another. In the video, the experiment aims to observe how the mass of objects (washers) affects the rate and efficiency of heat flow. The script describes how the washers are heated and then placed in water to measure the temperature change, which is a direct demonstration of heat flow.

💡Experiment

An experiment is a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact. The video outlines two different experiments to explore the relationship between mass and heat flow. Each experiment is carefully set up with specific conditions and measurements, such as the number of washers and the amount of water used.

💡Mass

Mass in physics refers to the amount of matter in an object and is a measure of an object's resistance to acceleration. The video's objective is to see how mass affects heat flow, with the hypothesis that more mass (more washers) will result in a different heat flow rate compared to less mass.

💡Hot plate

A hot plate is a piece of laboratory equipment used to heat substances, often liquids. In the video, a hot plate is used to heat the washers to a specific temperature before they are placed in the water. The hot plate is set at 250 degrees, indicating the controlled environment for the experiment.

💡Beaker

A beaker is a volumetric glassware used for mixing, dissolving substances, and heating liquids. In the script, beakers are used to contain water for the heat flow experiment. The video mentions labeling the beakers to distinguish between the different experimental setups.

💡Temperature

Temperature is a measure of the average kinetic energy of the particles in a substance. In the context of the video, temperature is a key variable being measured to understand how it changes due to the heat flow from the washers. The initial and final temperatures of the water are recorded to analyze the effect of mass on heat transfer.

💡Pencil

In the video, a pencil is used as a simple tool to suspend the washers in the beakers. The washers are tied to the pencil with string, allowing them to be submerged in water without touching the bottom of the beaker, which ensures that the heat transfer is not affected by direct contact with the beaker.

💡String

String is used in the experiment to tie the washers to the pencil, creating a setup where the washers can be suspended in the water. The video script cautions against using a certain type of string that unties easily, recommending a more durable option to ensure the stability of the experimental setup.

💡Milliliters

Milliliters are a unit of volume measurement used to quantify the amount of liquid in the beakers. The video mentions using 100 milliliters of water in the first experiment and 50 and 200 milliliters in the second, demonstrating how different volumes of water can affect the heat flow from the washers.

💡Initial temperature

The initial temperature is the temperature of a substance at the start of an experiment or process. In the video, the initial temperature of the water is recorded before the washers are added. This baseline measurement is crucial for comparing the temperature change after the washers are introduced, which indicates the heat flow.

💡Final temperature

The final temperature is the temperature of a substance at the end of an experiment or process. In the video, the final temperature of the water is recorded after the washers have been submerged for a few minutes. This measurement, compared to the initial temperature, provides data on the heat transfer that has occurred due to the mass of the washers.

Highlights

Objective of the washer heat flow lab is to study the effect of mass on heat flow.

Two different experiments are set up: one with two and six washers, and another with four washers.

Shiny pink string is used but not recommended due to its tendency to untie easily.

A rougher type of string is suggested for better knot retention.

Experiment setup involves tying washers to a pencil with space in between.

Two sets of four washers are prepared for the second experiment.

A beaker is used to heat the washers on a hot plate set at 250 degrees.

Labeling is important for differentiating between washer groups in the experiment.

Washers should not touch the bottom of the beaker to prevent tangling.

System one and system two are filled with 100 milliliters of water for the first experiment.

Initial temperature of the water is taken before placing washers.

Two washers are placed in one system, and six in the other to observe heat flow differences.

For the second experiment, different amounts of water are used: 50 milliliters in system one and 200 milliliters in system two.

The initial temperature of the water is recorded before adding the washers.

A set of four washers is placed into each system to compare temperature changes.

Final temperature is recorded after a couple of minutes to assess heat flow.

The lab setup is easy and suitable for student participation.

The experiment serves as an educational tool to discuss mass's impact on heat flow.

Transcripts

foreign

[Music]

this is the washer heat flow lab where

the objective is to see how Mass affects

heat flow we're going to set up two

different experiments the first one uses

two and six washers and the second one

uses four washers for both systems

and even though I'm using this kind of

shiny pink string for the video I

wouldn't recommend using it because I

found out that it unties very easily so

if you use a different type of string

that's a little more rough the knots

actually stay in it easier

so it's pretty easy to set up you just

tie each group of washers to the pencil

with a little bit of space in between

them as you'll see here in the video

and then just repeat that for the two

sets of four washers each

so now we need to heat up the washers

just put a beaker on a hot plate I set

it at 250 here and label it as two

washers and six and the other one has

four and four washers

and I like to tie the strings so that

the washers aren't touching the bottom

that way if I have a lot of groups that

I want to do at once I can put them all

in a row and they don't get tangled as

easily

for the first experiment we're going to

use the same amount of water in each of

the two systems so system one and system

2 have 100 milliliters of water take the

initial temperature and then place two

washers in one system and six in the

other and see how that affects the final

temperature for the second experiment

we're going to use different amounts of

water but the same number of washers to

see how the temperature changes we'll

fill system one with 50 milliliters of

water and system 2 with 200 milliliters

of water just like before record the

initial temperature of the water then

take the set of four washers and place

them each into two different systems

after a couple minutes record the final

temperature and then compare the results

this is a very easy lab to set up and

pretty easy for students to do and a

great way to discuss how Mass affects

heat flow in different systems