Ids 102 quiz 1
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IDS 102 Quiz 1. Jiminy Cricket and mixing water. What do we know about  J?. 1a) The Graph: (1 pt). This is good…. 1a) The Graph:. Is this more useful? (Maybe, maybe not). 1b) Find the equation (2 pts). First find the slope Key question: What’s y? What’s x?. 1b) The equation.

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IDS 102 Quiz 1

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Ids 102 quiz 1

IDS 102 Quiz 1

Jiminy Cricket

and mixing water


What do we know about j

What do we know about J?


1a the graph 1 pt

1a) The Graph: (1 pt)

  • This is good…


1a the graph

1a) The Graph:

  • Is this more useful? (Maybe, maybe not)


1b find the equation 2 pts

1b) Find the equation (2 pts)

  • First find the slope

    • Key question: What’s y? What’s x?


1b the equation

1b) The equation

  • Then find the intercept

    • Choose ONE point on your graph…

    • …such as (15 C, 76 J) (what’s y? what’s x?)

Notice that the intercept is NEGATIVE!

We knew this from the graph.


1b the equation1

1b) The equation

  • So the equation is…

    ( Jiminy) = (7.2)( Celsius) – 32

    Hint: write it in a way so that youcan’t forget: “what’s y? what’s x”?


1c specific temperatures 2 pts

1c) Specific temperatures (2 pts)

  • In degrees Jiminy, water freezes at…

    (7.2)(0  Celsius) – 32 =-32 degrees Jiminy

  • In degrees Jiminy, water boils at…

    (7.2)(100  Celsius) – 32 =688 degrees Jiminy


2 complete the sentence 1 pt

#2) Complete the sentence (1 pt)

  • When we say that one object is warmer than another, what we mean is that the warmer object has a higher temperature.

  • When a warm object is placed in contact with a cold object the warm object gives some heat to the cold object.


3 mixing water

#3) Mixing water

  • a) (2 pts) If only 20 calories changes hands…

    • The 50 gram water sample (initially at 20) warms up, so we just need to figure out how much:

    • The 20 gram water sample (initially at 55 C) cools down by


3 mixing water1

#3) Mixing water

  • b) (2 pts) Once heat transfer has stopped…

    • The final temperature will be

You could also solve this by preparing a table. The table would have to be large enough that a total of 500 calories could be transferred from the warm water to the cool water.


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