Group Discussion Rules: Energy Calculations.

Rules and Regulations for Group Discussion: Energy Calculations

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GA1: Rules and Regulations.

You are a member of a group on eClass (check your group number on your eClass profile)

All members in each group MUST work actively during the assignment.

All members of the group get the same grade.

You can not split the questions. You MUST work together to solve the questions one-by-one and together.

Write you answer and upload your one file for all members in group (pdf format or Microsoft word are acceptable) into eClass

You MUST respect each other at all time, even if you don’t know them or don’t like them.

You can and should disagree with others, but you MUST be respectful at all time.

Some of the steps you learn here will be tested in your exam

Compare the energy scales of mechanical, chemical, and mass energy by calculating (a) the energy associated with dropping 10 kg of coal through a vertical distance of 100 m, (b) burning 10 kg of coal, and (c) converting the mass of 10 kg of coal into energy via nuclear power plant.

You will solve this problem in 3 following separate steps. [2 marks for each step]

(a) Calculate the energy associated with dropping 10 kg of coal through a vertical distance of 100 m. Assume that you know:

(b) Calculate the energy associated with burning 10 kg of coal based on the following information:

Two cubic meter of water is poured off a 200-meter-high bridge. If the change in gravitational potential energy is converted into electricity with an efficiency of 90%, how long can this energy illuminate a standard 100 [W] light bulb?

You will solve this problem in 3 following separate steps. [2 marks for each step]

a. Calculate the mass of two cubic meter of water, based on the following information.

b. Calculate the energy created when two cubic water poured from 200 meter, based on the following information. Calculate the useable energy if the efficiency is 90% based on the following information.

c. Calculate the time if you use the useable energy from step 3 to illuminate the light bulb.

Five grams of methane is burned, and the heat is used to raise the temperature of 2 kg of water. If the initial temperature of the water is 20 (?, what is the final temperature of water?

You will solve this problem in 2 separate steps. [2 marks for each step]Calculate how much energy is released by burning 5 grams of methane based on the following information.

Calculate the final temperature of water based on the following information.

Calculate the ideal Carnot efficiency of a steam turbine that utilizes steam at a temperature of 775 (? and ejects water to the environment at a temperature of 45 (?.