Today in Physics 4B with Professor Mason, we conducted many experiments. This post is an overview of what we did on Tuesday, August 26th, 2014.
Fahrenheit v. Celsius:
First, we discussed the linear relationship between the Fahrenheit and Celsius temperature systems and plotted the relationship.
Fire Bubble:
Below, my lab group and I wrote a prediction about what would happen to a bubble with methane gas inside.
What would happen if we were to light the bubble on fire?
We used a blow torch, methane gas, and bubble mixture for simulation.
Aluminum Can:
Next, we were given two 50 grams of water at different temperatures and were asked to predict what would happen to the temperature of the water if we mixed them.
What if the colder water amount was doubled?
Here's a graph to visually show you what happened.
We recorded this data by using the Logger Pro program and two temperature probes.
We were then asked what would happen if the hot water was put inside an aluminum can surrounded by the cooler water.
Here is a short clip of what we did.
We used the same instruments as before to record our data.
Here is an atomic model of the experiment mentioned above.
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How can one make a liquid inside plastic container cooler?
My lab group and I came up with some ideas.
Heat Flow:
We did a quick calculation of the heat flow of a rod made of copper and aluminum.
We had to make some corrections to our numbers.
Heat Transfer as Energy Exchange:
The Immersion heaters that we used in this lab were rated to 300W. Thus, if we ran the heater for 20 seconds, the Immersion heater should generate about 6000J. My lab group and I then immersed it into a cup of 200 mL water, which was at 29.3 degrees Celsius.
This is a Heat v. Temperature graph of 200 mL of water being heated by an Immersion heater for 20 seconds.
The relationship of this graph is linear, the equation being Watts multiplied by time in seconds. If we halved the mass of the water in our cup to 100 mL, the graph would become shallower.
This is a graph of the heat per unit mass v. temperature. The slope of this graph represents the conductivity of the immersion heater.
And this is a quick clip of what we did during the procedure. We recorded the amount of watts the Immersion heater was using with a Watt-meter. Unfortunately, the amount of watts our immersion heater was outputting was 296W.
