The purpose of this differential heating lab is to see which of the given materials would heat up faster or remain the same when heated by our heat lamp. in previous years, when this lab has been conducted for the most part, results were the same as our results. Our background knowledge consisted of knowing about which of the given materials were more flammable.

Hypothesis: if differential heating occurs, then different materials will heat at different rates. I would assume that the leaves would heat up the fastest because i think that the leaves would be the most flammable out of all the other materials. I think the water temp would stay the same because water is less flammable and generally takes a long time to heat up.

Materials: 6 beakers 6 thermometers light source sand dirt tape water bark dust ring stand gravel leaves
Procedure: first we filled each of the six beakers half full with the six different materials provided. Then we placed a thermometer 1/2 way into each beaker with the materials. Then we taped a thermometer to each of the beakers so the thermometer stays in the middle of the beaker. Next we placed all of the beakers directly under the light source and then turned the light source on. Afterwards, we recorded the temperature of each material every three minutes for eighteen minutes total. After the eighteen minutes, we turned the light off but remained recording temperatures every three minutes as the materials cooled for eighteen more minutes. After we finished recording our data we prepared a line graph of temperatures for each material over the thirty six minute time period of heating and cooling.

Data: Data Chart

Conclusion: My hypothesis was correct in saying that the temperature of the water would stay the same while the other materials temperature changed while heating and cooling. i was surprised to find that sand didn’t heat up the fastest since it is usually so hot to walk on during the day...

...essay:
Writer’s Checklist for Evaluation Essay
1. Have I included a clear description of the subject I am evaluating? Yes, I have included a clear description of a geothermal heating system.
2. Does my thesis clearly state my opinion of the subject I am evaluating? Yes, my opinion is that this type of heating system is sought by some homeowners.
3. Have I used effective criteria to evaluate my subject? I believe that my criterion is effective in...

...To: The Honorable Winona I. Zard, Mayor of Emerald City
From: Thinh Quang Le, Home Heating Consultant, Queen Anne Office Natural Habitat
Date: February 24, 2012
Subject: Informative Report on Colin Sell's Home Improvement with Home Heating
On January 18, 2012, Mr. Sell sent a letter to inform us about the condition of his house and ask us whether a consultation for upgrading his house would be beneficial. We replied to him on...

...Doctor Gary Hall
Differential Equations
March 2013
Differential Equations in Mechanical Engineering
Often times college students question the courses they are required to take and the relevance they have to their intended career. As engineers and scientists we are taught, and even “wired” in a way, to question things through-out our lives. We question the way things work, such as the way the shocks in our car work to give us a smooth ride back and forth to...

...2011
1806 words Manish Kumar
A write up on Solar Water Heating System & JNNSM in India
Introduction
Solar energy, being abundant and widespread in its availability, makes it one of the most attractive sources of energies. Tapping this energy will not only help in bridging the gap between demand and supply of electricity but also save money in the long run. A 100-litre capacity Solar Water Heating System (SWHS) can replace an electric...

...CHAPTER 2
FIRST ORDER DIFFERENTIAL EQUATIONS
2.1 Separable Variables
2.2 Exact Equations
2.2.1 Equations Reducible to Exact Form.
2.3 Linear Equations
4. Solutions by Substitutions
2.4.1 Homogenous Equations
2.4.2 Bernoulli’s Equation
2.5 Exercises
In this chapter we describe procedures for solving 4 types of differential equations of first order, namely, the class of differential equations of first order...

...Heating and
Cooling With
a Heat Pump
Heating and Cooling
With a Heat Pump
Produced by
Natural Resources Canada’s
Office of Energy Efficiency
EnerGuide
The Heating and Cooling series is published by the
EnerGuide team at Natural Resources Canada’s Office of
Energy Efficiency. EnerGuide is the official Government of
Canada mark associated with the labelling and rating of the
energy consumption or energy efficiency of household appli-...

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1.0 Introduction
In mathematics, if y is a function of x, then an equation that involves x, y and one or more derivatives of y with respect to x is called an ordinary differential equation (ODE). The ODEs which do not have additive solutions are non-linear, and finding the solutions is much more sophisticated because it is rarely possible to represent...