Normal Technical Sec 3 Science Worksheet Energy

Over the years, i took in NT students. But sadly, i couldnt find any resources for them to practice. So sad.

So over the years, i come up with questions for them. I decided to continue to do more resources for these group of students. Maybe one day, i can published my own NT science book.  🙂

 

This is one example of one worksheet.  Decided to post this after one of my student told me her friend also want some questions to practice.

Energy

 

  1. State 5 forms of energy apart from light and sound energy.

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  1. What does potential energy means?

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  1. What energy do a moving object exhibit?

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  1. Briefly state the energy conversion for
    1. Battery operated vacuum cleaner

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  1. Computer when it is switched on

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  1. Explain how thermal energy is transferred when ice is added to a cup of hot tea.

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  1. What is the principle of conservation of energy

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  1. We have the energy to push/pull objects. Where do this energy comes from?

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  1. Calculate how much electrical energy is transformed to light energy when a 20W bulb is switched on for 2hrs and 40 minutes.

 

 

 

 

 

  1. Calculate how much electrical energy is transformed to sound and light energy when a 5750W TV is switched on for 47 minutes.

 

 

 

 

 

  1. Calculate how much power is the electrical fan operating at when 7000J of electrical energy is supplied for 25mins.

 

 

 

 

 

  1. Calculate how much power is the electrical appliance operating at when 540J of electrical energy is supplied for 185 seconds.

 

 

 

 

 

 

  1. A 1200W heater is used to boil a certain amount of water. The energy consumption is 530J. Determine the time taken to boil this amount of water?

 

 

 

 

 

  1. The electrical appliances X and Y are marked 100W and 125W. If they are turned on the same amount of time, which appliance consumes less energy? Explain your answer.

 

 

 

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