Paper 1 Revision

Some people don't like them and they don't work well on non-windy days.

They can be disruptive to the local environment.

They involve flooding a large area which may include people's homes or animal's habitats.

<p>It can only be used in volcanic counties.</p> Signup and view all the answers

<p>Power - Watts (W), Energy transferred - Joules (J), Time - seconds (s)</p> Signup and view all the answers

<p>Elastic potential energy = 1/2 * spring constant * extension^2, Units: Elastic potential energy - Joules (J), Spring constant - newtons per meter (N/m), Extension - meters (m)</p> Signup and view all the answers

<p>Efficiency = useful energy out / total energy in, Efficiency can be expressed as a percentage or a decimal</p> Signup and view all the answers

<p>The Law of Conservation of Energy states that energy cannot be created or destroyed, it can only be transformed into another form of energy.</p> Signup and view all the answers

<p>The different types of energy mentioned in the text are gravitational potential energy, electrical energy, elastic potential energy, kinetic energy, sound energy, light energy, nuclear energy, chemical energy, and heat or thermal energy.</p> Signup and view all the answers

<p>One example mentioned in the text is a phone, where electrical energy goes in, chemical energy is stored, and heat, light, and sound energy come out.</p> Signup and view all the answers

<p>Charge equals current times time ($Q = It$).</p> Signup and view all the answers

<p>Potential difference equals current times resistance ($V = IR$).</p> Signup and view all the answers

<p>As the temperature increases, the resistance increases.</p> Signup and view all the answers

<p>The text mentions that there are many practicals in this topic, but does not specify the core practicals.</p> Signup and view all the answers

<p>A battery is made up of more than one cell.</p> Signup and view all the answers

<p>Power is measured in watts (W), energy is measured in joules (J), and time is measured in seconds (s).</p> Signup and view all the answers

<p>The equation for power is P = IV, where P is power, I is current, and V is potential difference.</p> Signup and view all the answers

<p>The equation for energy is E = Pt, where E is energy, P is power, and t is time.</p> Signup and view all the answers

<p>The equation for energy is E = QV, where E is energy, Q is charge, and V is potential difference.</p> Signup and view all the answers

<p>cosmic radiation, testing of nuclear weapons, plane travel, nuclear power stations</p> Signup and view all the answers

<p>cancer treatment, sterilizing materials, smoke alarms</p> Signup and view all the answers

<p>breaking apart of atoms, chain reaction, release of neutrons and radiation</p> Signup and view all the answers

<p>fusion of nuclei, release of energy, light, heat, sound</p> Signup and view all the answers

<p>half-life, type of radiation</p> Signup and view all the answers

<p>The mass number is equal to the number of protons plus the number of neutrons.</p> Signup and view all the answers

<p>The atomic number is equal to the number of protons and electrons in an atom.</p> Signup and view all the answers

<p>The three types of radiation are alpha radiation, beta radiation, and gamma radiation.</p> Signup and view all the answers

<p>Rutherford's gold foil experiment provided evidence for the nuclear model of the atom.</p> Signup and view all the answers

<p>The unit for measuring activity is the Becquerel.</p> Signup and view all the answers

<p>$\rho = \frac{mass}{volume}$, units: mass (kg), volume (m^3), density (kg/m^3)</p> Signup and view all the answers

<p>$\Delta E = m \cdot c \cdot \Delta T$, units: $\Delta E$ (J), m (kg), c (J/kg°C), $\Delta T$ (°C)</p> Signup and view all the answers

<p>$E = m \cdot L$, units: E (J), m (kg), L (J/kg)</p> Signup and view all the answers

<p>Temperature is directly proportional to the average kinetic energy of molecules.</p> Signup and view all the answers

<p>Pressure = Volume $\times$ Constant, units: Pressure (Pa), Volume (m^3)</p> Signup and view all the answers

<p>The pressure in the system increases.</p> Signup and view all the answers

<p>Work done = Pressure $\times$ Change in volume, units: Work done (J), Pressure (Pa), Change in volume (m^3)</p> Signup and view all the answers

<p>Work done on a gas is directly proportional to the pressure in the system.</p> Signup and view all the answers

<p>Average kinetic energy = $\frac{3}{2}kT$, units: Average kinetic energy (J), T (K)</p> Signup and view all the answers

<p>Evaporation lowers the average kinetic energy of a system.</p> Signup and view all the answers