ACTIVITY 5. POWER OF A STUDENT (Teacher’s Notes) PROCESS SKILLS: Measure, Observe, Compare, Test, Explain OBJECTIVE: The objective of this activity is to motivate the concept of power, or rate at which energy is transformed, and to apply it to the rate at which students do work to increase their gravitational potential energy in climbing a flight of stairs. IDEA: Students are asked to measure their gain in gravitational potential energy as they climb a flight of stairs, then to calculate the rate at which this potential energy is gained. This is followed by asking students to calculate their body’s energy needs for a day, both to perform various physical activities (including the climbing of stairs) and to maintain internal body functions. …show more content…
The rate at which you do work is called power. Like the rate at which electric appliances transform electrical energy to other forms, power is expressed in joules/sec, or watts. With how many watts of power can you climb the stairs?
Materials: meter stick stopwatch bathroom scale (optional) 1. Devise a plan to make the measurements and calculate the work you must do to climb a flight of stairs as well as the rate at which you do it (your power). Use standard metric units. After your teacher approves your plan, carry it out under your teacher’s direction.
2. Create an organized data chart showing the data you measured as you climbed the flight of stairs. 3. Create a detailed, step-by-step data analysis sheet showing what you did to calculate the power (in watts) with which you climbed the stairs. Climbing stairs is only one activity in which you do work – either on yourself or something else – during the day. This work is made possible because of the energy you gain
Teaching About Energy
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©2003 AAPT, John L. Roeder
from the food you eat. In fact, most of the energy from the food you eat goes to maintain your internal body functions, like maintaining your internal body temperature at 37 degrees Celsius. The energy from the food you eat is rated on nutrition labels in terms of Calories, and each Calorie of energy can increase the temperature of one kilogram of water by one
Transportation – I use my vehicle to commute to and from work and to run any errands
Energy is needed to keep the body temperature at certain level as humans are warn blooded we can only digest food and the body will only function at a certain temperature. energy is needed for movement of the muscle but they only function when they are warm. Coldblooded people use energy from food and the energy from the environment which then
The Knights of Labor's first founder was Uriah Stevens. The Knights of Labor were a secret organization, but Terence Powderly ended the group's secrecy, and took control of the organization in 1879. Terence Powderly lead a group of individuals which included men, women, and even sometimes very small and young children. They eventually added African Americans as well to the organization. The members of this guild were more times than not unskilled workers. Often times these workers held jobs at large scale factories and in shipyards as well as many other places. This guild of workers often got paid very little for the hard work and long hours that they put into their jobs. This left the works with nothing to show at the end of the day for all
The immigrants worked hard to survive even though they were not accepted and received low wages. It really is admiral that this people would work in the conditions they worked in just to have a better life. In the course book on page 621, it states that the Knights of Labor envisioned a “universal brotherhood” for all workers, from the common laborers to master craftsmen. I did some research and found an article titled, “Knights of Labor”, written History.com Staff. In this article, it mentions how the Knight of Labor sought eight-hour days, abolition of child labor, equal pay for equal work, and political reforms. As you can see, America was gradually becoming a “land of opportunity”. In my opinion, America, to a certain degree, earned the
The successes and failures of the Knights of Labor, have generated many controversial issues that have helped shape the North American labor movement. They fought for eight-hour day shifts, abolition of child labor, equal pay for equal work, and political reforms, including the graduated income tax in the late 1800s. During this time period, many immigrants were coming to America to find jobs. The Knights affected all sorts of workers from this time period, including skilled and unskilled workers. In the present, a holiday, more equality, and government passed Acts were created thanks to the inspiration of the Knight’s actions. In the late 18 hundreds the Knights of Labor Union affected people’s lives, this including skilled and unskilled workers.
Energy is expended in a number of different ways such as the stated above; resting metabolic rate, thermic effect of activity, thermic effect of feeding and adaptive thermogenesis. An individual’s energy balance is the balance of calories consumed through eating and drinking compared to calories burned through physical activity, what an individual drinks and eat is energy in. what an individual burns though physical activity is energy out. Body weight is maintained and stable in the state of energy balance, the chemical bonds of carbohydrates, proteins and fats in food contain chemical energy which is then transformed in the human body in multiple metabolic processes to cellular energy, heat or stored energy. An individual’s burns a certain number of calories just by breathing air and digested food. They also burn a certain number of calories through their daily routine, an important part of maintaining energy balance is the amount of physical activity an
In our bodies we need energy so that we could do things that are possible such as move our muscles, talk and all the other things that we do. Without energy all humans would be useless not being able to do anything. Energy is needed to extract the oxygen from the areas in our bodies and diffuse it into our bloodstream. Supplying enough energy to support the functions of the body in a daily basis is one of the main reasons for food. This energy comes from the fats, carbohydrates, and proteins in the food you eat. Of the three, fat is the most concentrated source of energy. Energy requirements are normally put in terms of calories. The energy requirement for a person is spilt into two parts: basal metabolic requirements and energy required for activity. Basal metabolic rate (BMR) is the heat taken from the body at rest when temperature is normal. An average person requires 2000-2500 Calories per day while the difference for a large man doing heavy work may require up to 6000 Calories per day. When you choose foods that have more energy, or Calories than you need, the excess energy is stored as fat in the body which will results in putting on some weight. If too little food is eaten to meet energy demands, the body's stored fat serves as an energy source and this will result in weight loss. Your weight stays about the same if the energy from food matches the energy requirements of the body. As warm blooded
Photography plays an important role in reflecting a society. In the article "Looking at discipline, looking at labor", Eric Margolis talks about the representations of the photos of the Indian boarding schools in the US. Photographs are used to demonstrate the civilization of Native America Native American Children. Not only can we see the change of the students after civilization, but also the oppressive system in the Indian School. The photographs are used as the monitoring tool of the government too. The photographs provide us evident to all of these. We can know these by comparing the photos before the Native Indian Kids go to boarding school and after they attend the boarding school. By contrasting the photos from the two periods, we can see that the civilization of the Native American Indian children is actually an oppressive system.
According to Mother Jones, child labor is like slavery. It is incredibly tough and dangerous, especially for young children. Mother Jones begins by telling us how she heard “gruesome stories of little children working” in the factories. She wanted to see for herself if these terrible stories were true, unfortunately, she saw for herself how they were indeed true. Mother Jones first applied to a mill in Cottondale, that was the first encounter she had with the living conditions provided to the small children. She describes the house as a “sort of two-story plank shanty”, with broken windows and a sagging door. The place was small, and it offered no real protection. There were “cracks in the roof”, so when it rained it rotted the floors. She also talks about the downstairs’ “big open fireplace”, that had “holes big enough to drop a brick through”. This meant that if small children ran or played around the fireplace, they could fall and get injured. The living conditions alone were terrible and not adequate for children. The children also experienced harsh summers and winters. They were more prone to getting a disease and dying.
There's a lot going on in this example, so I'll be focusing on only a few of the points you bring up -- mainly the distinction (or lack thereof) between force and energy. How long does the average roller coaster take to rust or weaken before been destroyed? Some parts and tracks may take longer than depending on the quality. The parts are often replaced so the coaster probably will last longer but it starts getting to expensive to keep repair they can decide to tear it down and scrap it. What makes soap foam? The reason why some of the soap foams because the soap contains chemicals. Why do we yawn? The reason we yawn because our bodies take in less oxygen when our breathing has slowed. Yawning helps bring in more oxygen into the blood and move more carbon
We have all heard that child labour is a bad thing, however, lets try and think is it, really?
1. Define the three energy pathways. For each pathway, identify two exercises that utilize the pathway. If you were training to run a marathon, which pathway would be the focal point of your training? What types of activities would you incorporate into your marathon training and why? How will an understanding of energy pathways help you in your future training endeavors?
The National Labor Relations Act (NLRA) started in July 1935 to protect the rights of employees, rather, they be union or nor-union employees (Pozgar, 2012). The employees are protected under the Act or may employ in bubble-like, rigorous goings-on in situations other than the customary union organizations and cooperative bargaining. The National Labor Relations Board regulates the employers from interfering with the rights of the employees to implement or organize and join with a groups that offers assists with collective bargaining purposes like organization union or joining one (Pozgar, 2012). The employer may not restrain, coerce or stop employees
To achieve this clarity, we can present examples of work that illustrate high, average, and low levels of achievement. Such exemplars can significantly motivate students, as well as increase their understanding of their own ability to achieve.
Negative effects of child labor can be solved through provided and accessible education to continue a child’s growth