WILL GIVE BRAINLEST Thermal Energy and Chemical Change Lab Report

Instructions: In this engineering lab, you will build and test a device that releases and absorbs thermal energy in order to reach a goal. You will need to repeat tests of your device to make sure it does not need to be redesigned or improved. Record your observations and test measurements in the lab report below. You will submit your completed report.

Note: If you cannot complete this lab as directed, please contact your instructor for assistance.

Name and Title:

Include your name, instructor's name, date, and name of lab.

Define the Problem:

In your own words, what is the goal of the engineering lab?

Criteria and Limitations:

In this section, please list at least three criteria that must be met by your train design. Also include any limitations that could prevent it from getting its cargo to the station.

Criteria

Limitations

Design Ideas—Pros and Cons:

In this section, describe three design ideas you have for your train. List at least one pro (a positive) and one con (a negative) for each design option.

Description of Train Design

Pro

Con

Train One

Train Two

Train Three

Data:

Record the results of each of the test runs you make to the train station. Be sure to describe any changes you make to your train between each test run.

Train One

Train Two

Train Three

Test Results?

Any redesign?
Test Results?

Any redesign?
Test Results?

Track One

Track Two

Track Three

Analyze Data and Refine Design:

This section will include an analysis of your test results and plans for redesigning your train. Please write in complete sentences.

Were any of your train designs able to get their cargo to the train station without crashing?

If yes, describe the design of the successful train.

If no, describe the design of the train that got closest to the station.

Which of your criteria presented the most challenge to getting the train to its goal, and why?

Which limitation was the biggest roadblock to getting the train to the station?

Why was it important to have endothermic and exothermic processes in the building materials of your train?

Which engines released thermal energy in an exothermic reaction?

Which engines absorbed thermal energy in an endothermic reaction?

If you could add any building item options to your virtual train to improve its design, what would those items be, and why would you need to add them?

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent

Show transcript transcripts online experiment: atomic structure [the history of atomic theory] this animation will you test rutherford’s hypothesis that it took a great number of shots to actually hit the nucleus because the size of the atom was so much larger than the nucleus.[clipboard and pencil with a diagram of rutherford’s gold foil experiment] we are going to use a cardboard box to represent the atom, a wooden block to represent the nucleus, and marbles to represent the alpha particles. [animated cardboard box, wooden block, and marbles] the box’s measurements are: length = 50 cm, width = 25 cm, and height = 25 cm. the measurements of the block are: length = 10 cm, width = 10 cm, and height is 5 cm. jose and priscilla will conduct the experiment. [animated boy and girl] priscilla put the block in the box on the floor. jose will close his eyes and drop marbles into the box trying to hit the block. priscilla will count the number of times the marbles hit the block and move the block in the box after each hit. [animated block moving inside the box. marble dropping into the box.] here is priscilla’s data of how many times the marble hit the block. out of 100 marble drops or shots, the marble hit the block 32 times. [data table: first column: marble, with rows 1 to 100; column 2: hit, with rows indicating yes or no. last row: total hits] now you can follow the directions in the experiment to present your findings. present your findings when you are finished with the experiment, complete the following data analysis and record your answers in the essay box below. determine the volume of the box and the block. determine the ratio of the block to the box: multiply this number by 100 to turn it into a percent. complete this statement: the volume of the block is percent of the volume of the box. determine the ratio of the number of hits to the number of shots: multiply this number by 100 to turn it into a percent. complete this statement: the block was hit percent of the time. compare the results of step 2 to the results of step 3. are the percentages similar? write a conclusion discussing the following items: based on your findings, do you think rutherford's hypothesis was reasonable? restate rutherford's hypothesis and describe how you tested it. state whether your results support the hypothesis. if they do not, can you suggest some error in experimental procedure (other than general human error) that might explain it? finally, explain how this experiment confirms the nuclear model of the atom and the idea that most of the atom is empty space.