6601746
Description
Quiz by Omar Dabbas, updated more than 1 year ago
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Created by Omar Dabbas
over 7 years ago
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Question 1
Question
A car is moving with a speed of 50 km/h. Give its speed in m/s with respect to three significant figures
Answer
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13.88 m/s
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13.9 m/s
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13.8 m/s
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13.888 m/s
Question 2
Question
If we want to build an electromagnet several equipment needed, which one of the following is not usually used in the construction of an electromagnet?
Answer
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Increase the current supplied
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Increase the number of coils around the electromagnet
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Use steel as the core metal of the magnet
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Use iron as the core metal of the magnet
Question 3
Question
Which one of the following gives us an example where a nuclear fusion take place?
Answer
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The reaction of Hydrogen molecules in the Sun to form Helium atoms
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The breakdown of Uranium atoms to Krypton and Barium in nuclear power stations
Question 4
Question
All enzymes are proteins but not all proteins enzymes.
Answer
- True
- False
Question 5
Question
If we have 3500 ml of NaCl (aq) in a solution, of concentration of 5 mol/dm3(cubed), there are 17.5 mol of NaCl present in this solution.
Answer
- True
- False
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