Description
What is meant by an initiative (or ballot measure)? Is this technique allowed in every state? If it is allowed, how can it be used by citizens if there is a feeling that the elected officials are ignoring or circumventing a public policy?
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Explanation & Answer
The ballot initiative is a means by which a petition signed by a certain minimum number of registered voters can bring about a public vote on a proposed statute or constitutional amendment.
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Assignment 6: Momentum
Instructor’s Overview
Collisions and momentum are something we
experience everyday. Most of the
collisions in our life are benign - bumping into a colleague in the hall,
enjoying an evening of bowling, or competing in a billiards tournament. Some collisions, such as automobile
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This activity is based on Lab 12 of the
eScience Lab kit.
Our lab consists of two main
components. These components are
described in detail in the eScience manual.
Here is a quick overview:
In the first part of the lab, you will experiment
with nearly elastic collisions using marbles.
In the second part of the lab, you will put on
your safety engineer’s hat and design a safe landing zone for an egg.
Take detailed
notes as you perform the experiment and fill out the sections below. This document serves as your lab report. Please include detailed descriptions of your
experimental methods and observations.
Experiment Tips:
·
Instead
of using a paper chute in the marble experiment, you can "flick" the
marble(s) down the ruler groove to the stationary line of marbles as in this
image:
[img width="180" height="251" src="file:///C:/Users/srarin/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg" alt="Description: Physics Lab 6 002" v:shapes="Picture_x0020_1">
·
I
recommend using hard-boiled eggs in the second component of the lab
activity. They are less messy and serve
as a handy snack after you complete the lab.
Date:
Student:
Abstract
IntroductionBackgroundObjectiveHypothesis
Material and Methods
Results
Marble experiment
Based on your
results from the marble experiment, please answer the following questions:
1. What kind of collision is exhibited by the
marbles in this experiment, and why?
2. When one marble hit the end of the line of
marbles, how many shot off the other end? Describe the momentum of the set of marbles
before and after the collision (assume elastic collisions).
3. How did the speed of the marble that comes
off the end of the line change as you increased the speed of the marble that
travels down the chute? Use what you
know about the conservation of momentum to describe what is happening.
4. What happened when you sent two marbles
down the chute?
5. Write down the total momentum for two marbles
of mass m both moving at velocity v. What
is the kinetic energy of the system?
6. When you drop two balls at once, why
doesn’t only one marble come off the end twice as fast? Write down the kinetic energy of one marble
with mass m and velocity 2v and compare this to your answer in Question 4 to
check. (Note that we are assuming the collisions are perfectly elastic, when in
reality this is an approximation.)
Egg experiment
Based on your
results from the egg experiment, please answer the following questions:
1. Did you come up with a design that prevents the egg
from breaking? Describe your approach in
detail.
2. Why did adding layers of paper work better than one
thick layer with the same number of sheets?
(Hint: over how much time is the force applied in each case?)
3. What did you do to improve your apparatus?
4. Explain how a circus net prevents trapeze artists from
injuring themselves even after falling from a large height.
5. Why it is important to bend your knees when you hit
the ground after jumping from several feet in the air?
Conclusions
References
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air pollution field, science homework help
I attached two documents. One of them has three questions that should be answered after following the instructions on the ...
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Need help finishing Momentum lab
Lab
Assignment 6: Momentum
Instructor’s Overview
Collisions and momentum are something we
experience everyda ...
Need help finishing Momentum lab
Lab
Assignment 6: Momentum
Instructor’s Overview
Collisions and momentum are something we
experience everyday. Most of the
collisions in our life are benign - bumping into a colleague in the hall,
enjoying an evening of bowling, or competing in a billiards tournament. Some collisions, such as automobile
accidents, are more serious. In these
cases, advances in safety technology that leverage understanding of impulses
and momentum have dramatically reduced fatalities. In this lab we will explore the concepts of
impulse and momentum.
This activity is based on Lab 12 of the
eScience Lab kit.
Our lab consists of two main
components. These components are
described in detail in the eScience manual.
Here is a quick overview:
In the first part of the lab, you will experiment
with nearly elastic collisions using marbles.
In the second part of the lab, you will put on
your safety engineer’s hat and design a safe landing zone for an egg.
Take detailed
notes as you perform the experiment and fill out the sections below. This document serves as your lab report. Please include detailed descriptions of your
experimental methods and observations.
Experiment Tips:
·
Instead
of using a paper chute in the marble experiment, you can "flick" the
marble(s) down the ruler groove to the stationary line of marbles as in this
image:
[img width="180" height="251" src="file:///C:/Users/srarin/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg" alt="Description: Physics Lab 6 002" v:shapes="Picture_x0020_1">
·
I
recommend using hard-boiled eggs in the second component of the lab
activity. They are less messy and serve
as a handy snack after you complete the lab.
Date:
Student:
Abstract
IntroductionBackgroundObjectiveHypothesis
Material and Methods
Results
Marble experiment
Based on your
results from the marble experiment, please answer the following questions:
1. What kind of collision is exhibited by the
marbles in this experiment, and why?
2. When one marble hit the end of the line of
marbles, how many shot off the other end? Describe the momentum of the set of marbles
before and after the collision (assume elastic collisions).
3. How did the speed of the marble that comes
off the end of the line change as you increased the speed of the marble that
travels down the chute? Use what you
know about the conservation of momentum to describe what is happening.
4. What happened when you sent two marbles
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5. Write down the total momentum for two marbles
of mass m both moving at velocity v. What
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6. When you drop two balls at once, why
doesn’t only one marble come off the end twice as fast? Write down the kinetic energy of one marble
with mass m and velocity 2v and compare this to your answer in Question 4 to
check. (Note that we are assuming the collisions are perfectly elastic, when in
reality this is an approximation.)
Egg experiment
Based on your
results from the egg experiment, please answer the following questions:
1. Did you come up with a design that prevents the egg
from breaking? Describe your approach in
detail.
2. Why did adding layers of paper work better than one
thick layer with the same number of sheets?
(Hint: over how much time is the force applied in each case?)
3. What did you do to improve your apparatus?
4. Explain how a circus net prevents trapeze artists from
injuring themselves even after falling from a large height.
5. Why it is important to bend your knees when you hit
the ground after jumping from several feet in the air?
Conclusions
References
2 pages
Behs Wkfv Par Tod Neg Sen Tur Pos
1. "Look at the dirty footprints you put on my clean kitchen floor. You never consider “Please wipe your feet before you ...
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Greenhouse Effect
We will talk about five steps to explain greenhouse effects. Where R is the Earth’s radius, S is the energy flux density ...
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