A family of four would use on average 54 000 kJ of electrical energy per day. State two things they could do to make up the difference between what the solar panel produces and what they need
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Card 7
Front
State the Principle of Conservation of Momentum as it applies to collisions.
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Card 8
Front
Explain, carefully, how a crumple zone makes it safer for the people inside the car when it is brought to a stop during a collision.
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Card 9
Front
Ice has a density of 0.9 g/cm3 and water has density of 1.0 g/cm3. What does this tell you about the spacing of the molecules in the two states?
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Card 10
Front
The stone block weighs much more than the force the man uses to raise it. Explain carefully how the lever allows him to raise the stone block.
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Card 11
Front
State two possible uses of gamma radiation.
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Card 12
Front
Describe how the electrons are arranged in the “Plum Pudding” model of the atom and the present Rutherford-Bohr model.
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Card 13
Front
State two effects that an unbalanced force can have on an object
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Card 14
Front
What is a renewable energy source?
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Card 15
Front
(iv) What has happened to the other 15% of the potential energy?
