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PHYS 204 iLab 9 | DeVry Online Help

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The measured resistance of the heater is 
The voltage applied across the heating resistor is
The power dissipated by the heating resistor isThe mass of water in cup is 
Paste a copy of your temperature–time graph here.Was the thermal energy gained by the water greater, the same as, or less than the electrical energy dissipated by the resistorThe heating resistor is rated at 10 ohms and 1 watt. What percentage of the power rating was used during this activity? Why didn’t the resistor burn upWhat are some factors that could account for the percent difference between the experimental and the accepted values for the electrical equivalent of heat
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PHYS 204 iLab 6 | DeVry Online Help

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(1 point) Paste the Vx-time plot from phys204_lab6_inelastic1.trk here

(4 points) Record the measured initial and final average velocities of the red cart and the initial and final momenta in the table below

(2 points) Compute the percent difference between the initial momentum and the final momentum and record it below

(1 point) Paste the Vx-time plot from phys204_lab6_inelastic2.trk here

(4 points) Record the measured initial and final average velocities of the red cart and the initial and final momenta in the table below

(2 points) Compute the percent difference between the initial momentum and the final momentum and record it below. Show your work

(1 point) Paste the Vx-time plot from phys204_lab6_elastic.trk here

(4 points) Complete the table below

(2 points) Compute the percent difference between the calculated and measured final velocities for the blue cart and record it below

(4 points) Was the measured final velocity greater than or less than the calculated final velocity in the elastic collision? Explain why

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PHYS 204 iLab 3

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Paste the first position-time graph below

Describe the difference between a position-time graph made by walking slowly away from the sensor and one made by walking away quickly

Describe the difference between a position-time graph made by walking slowly away from the sensor and one made by walking towards the sensor slowly

Is your prediction the same as the final result? If not, describe how you would move to make a graph that looks like your prediction

Paste the first velocity-time graph below

What is the most important difference between a velocity-time graph made by slowly walking away and one made by quickly walking away

How are the velocity-time graphs different for motion away and motion towards the sensor

Paste the velocity-time graph with your prediction for Item 18 below

Is your prediction the same as the final result? If not, describe how you would move to make a graph that looks like your prediction

Place the graphs from Item 19 below

What is the average velocity that you calculated from the velocity-time graph

Record the equation of the fit that you found from the position-time graph? Compare the slope with the average velocity recorded above

What is the meaning of the y-intercept from the fit

How can you tell from a velocity-time graph that the moving object has changed direction? What is the velocity at the moment the direction changes

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PHYS 204 iLab 10

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How does the light intensity of a point source depend on distance

Paste a copy of your intensity-distance graph here

Record the results from the various fits

Which choice from the Fit menu was the best fit for your data

How does the light intensity depend on distance

Do your results agree with your prediction from the theory

List some reasons that your results may not match the relationship you predicted

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PHYS 204 iLab 7 | DeVry Online Help

PHYS 204 iLab 7 | DeVry Online Help | PHYS 204  Full Course -  DevryOnlineHelp.com | Scoop.it

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Paste your position-time graph below

Paste your velocity-time graph below

Do a straight-line fit on each of the straight lines of the sawtooth velocity-time graph. Record each slope in the table below, and then average them to find your value for the acceleration due to gravity

How does your value for g (slope of velocity versus time) compare to the accepted value of the acceleration of a free-falling object (g = 9.8 m/s2)? Calculate a percent difference between your measurement and the standard value of g

What factors do you think may cause the experimental value to be different from the accepted value

How does the decrease in gravitational potential energy of a falling ball compare to its increase in kinetic energy

What happens to the total of the gravitational potential energy plus the kinetic energy as a ball falls

What happens to the gravitational potential energy (Energy #1) as the ball falls

What happens to the kinetic energy (Energy #2) as the ball falls

What does the “Total Energy–Time” graph tell you about the total energy of the ball as it falls

What is one reason that some of the energy is lost as the ball falls

 
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PHYS 204 iLab 5 | DeVry Online Help

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What happens to an object when you apply a net force to it?What happens to the motion of an object if it has a constant mass but you change the magnitude of the net force on itPaste the velocity-time graph of your data showing the four runsRecord the mass of the cart that was measured using a scaleCompare the average cart mass with Mscale by calculating a percent difference. Show your workWhy did the slope change at for each runFor Runs #2, #3, and #4, what did you observe about the slope of the Linear Fit as the net force increasedWhat are the units for the slope for each graph? ExplainWhat happens to an object’s acceleration if the net force applied to the object is increased but the object’s mass remains constant
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PHYS 204 iLab 2 | DeVry Online Help

PHYS 204 iLab 2 | DeVry Online Help | PHYS 204  Full Course -  DevryOnlineHelp.com | Scoop.it

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Paste the first position-time graph below

Describe the difference between a position-time graph made by walking slowly away from the sensor and one made by walking away quickly

Describe the difference between a position-time graph made by walking slowly away from the sensor and one made by walking towards the sensor slowly

Is your prediction the same as the final result? If not, describe how you would move to make a graph that looks like your prediction

Paste the first velocity-time graph below

What is the most important difference between a velocity-time graph made by slowly walking away and one made by quickly walking away

How are the velocity-time graphs different for motion away and motion towards the sensor

Paste the velocity-time graph with your prediction for Item 18 below

Is your prediction the same as the final result? If not, describe how you would move to make a graph that looks like your prediction

Place the graphs from Item 19 below

What is the average velocity that you calculated from the velocity-time graph

Record the equation of the fit that you found from the position-time graph? Compare the slope with the average velocity recorded above

What is the meaning of the y-intercept from the fit

How can you tell from a velocity-time graph that the moving object has changed direction? What is the velocity at the moment the direction changes

 
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PHYS 204 iLab 1 | DeVry Online Help

PHYS 204 iLab 1 | DeVry Online Help | PHYS 204  Full Course -  DevryOnlineHelp.com | Scoop.it

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(1 point) What is the precision of the caliper? 0.01 mm (or 0.0005”)(2 points) Record your measurements of the diameter of the quarter in the table below(2 points) Record your measurements of the thickness of the quarter in the table below(0 points) Which coin did you choose for the next part of the experiment(2 points) Record your measurements of the diameter of the coin in the table below6. (2 points) Record your measurements of the thickness of the coin in the table below(1 point) Why is it a good idea to average your measurements(1 point) What is the precision of your diameter measurements(1 point) What is the precision of your thickness measurements(3 points) Use the averages of your measurements and the coin masses listed in the table in the introduction, and calculate the volume and density for the quarter and your coin. Record your results in the table below. Be sure to use the appropriate number of significant digits and correct units(1 point) Is the coin you chose made of the same metal as the quarter? How do you know(1 point) How many quarters would be required to make a stack as tall as your height(1 point) What would the total mass of such a stack be(1 point) Could you use your caliper to measure the thickness of a single sheet of paper? To what accuracy? To what precision(1 point) Devise a scheme to measure the average thickness of the pages of a book more accurately than using the caliper on a single sheet. Describe and implement your scheme
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