6601746
Descripción
Test por Omar Dabbas, actualizado hace más de 1 año
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Creado por Omar Dabbas
hace alrededor de 8 años
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Pregunta 1
Pregunta
A car is moving with a speed of 50 km/h. Give its speed in m/s with respect to three significant figures
Respuesta
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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
Pregunta 2
Pregunta
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?
Respuesta
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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
Pregunta 3
Pregunta
Which one of the following gives us an example where a nuclear fusion take place?
Respuesta
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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
Pregunta 4
Pregunta
All enzymes are proteins but not all proteins enzymes.
Respuesta
- True
- False
Pregunta 5
Pregunta
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.
Respuesta
- True
- False
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