# Physics P1

• Created by: Amy_5639
• Created on: 13-04-18 16:38
1a.Describe Rutherford's gold foil experiment.
Firing positively charged alpha particles at an very thin sheet of gold, and they were expecting the particles to pass straight through or only slightly be deflected. But, more than expected were deflected and some were even deflected straight back
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1b.How did the results of this experiment disagree with the Thomson model of the atom?
Because Thomson's model shows that most of the particles pass through empty space and only a few are deflected
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2.How did Bohr's model of the atom differ from Rutherford's?
Bohr put the electrons in shells so the atom wouldn't collapse and each shell has a fixed energy
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3.Roughly how big is an atom?
0.1-0.5 nanometers(1 × 10−10 m to 5 × 10−10 m)
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4.What is density?
Density is a measure of the 'compactness' of a substance. It relates the mass of a substance to how much space it takes up
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5.How is density calculated?
Density=mass (divided by) volume
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6.Describe solids in terms of the movements of their particles.
Solids=Strong forces of attraction, particles close together, fixed regular arrangement, don't have much energy, only vibrate around their fixed positions
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7.Describe liquids in terms of the movements of their particles.
Liquids=weaker forces of attraction, particles close together but can move past each other, irregular arrangements, more energy than particles in solids, move in random directions at low speeds
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8.Describe gases in terms of the movements of their particles.
Gases=almost no forces of attraction, more energy than particles in liquids, free to move, travel in random directions at high speeds
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7.Explain what happens to the mass of a substance when it changes state.
Provided you're working with a closed system, the mass of a substance isn't affected when it changes state
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8.What is the relationship between temperature and the energy in the kinetic store of the particles in a substance?
Heating a substance increases the energy in it's kinetic energy store
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9.What is the specific heat capacity of a substance?
It is the change in energy in the substance's thermal store needed to raise the temperature of 1kg of that substance by 1 degrees
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10.Describe an experiment to find the specific heat capacity of water.
Put water in insulating container+measure the temp with thermometer. Connect electrical heater to joulemeter,then put end of heater in water. Turn on power of joulemeter+when temp has increased by 10 degrees record energy on joulemeter+ the increase
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11.A gas is cooled, until it becomes a liquid and eventually turns into a solid. Sketch a graph showing how the temperature of the substance changes over time. Include labels to show the boiling point and the melting point and the changes of state.
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12a.What is meant by the specific latent heat of fusion?
It is the change of energy in its thermal energy store when 1kg of the substance changes state without changing its temperature
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12b.What is meant by the specific latent heat of vaporisation?
It is the specific latent heat for changing between a liquid and a gas (boiling or condensing)
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13.What happens to the pressure of a gas in a sealed container of fixed volume when it's heated?
Energy is transferred to the kinetic energy stores of the gas particles and they move faster. This means the particles hit the container walls harder and more often creating more pressure
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## Other cards in this set

### Card 2

#### Front

1b.How did the results of this experiment disagree with the Thomson model of the atom?

#### Back

Because Thomson's model shows that most of the particles pass through empty space and only a few are deflected

### Card 3

#### Front

2.How did Bohr's model of the atom differ from Rutherford's?

### Card 4

#### Front

3.Roughly how big is an atom?

### Card 5

#### Front

4.What is density?