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Other components For this exercise, you need to know the I−V characteristic graphs for a diode and for a filament lamp, and some reasons why these graphs are not straight lines. Your graph should show the amplitude of oscillation decreasing significantly in the time of about five oscillations. Outline how you could use the absorption properties of nuclear radiation to show that a radioactive source emits only γ-radiation. b State the difference in structure between a neutral atom of 2He , a singly charged ion of 2He and an α-particle.

How superposition leads to stationary waves This exercise gives you practice using graphs of stationary waves and in applying the principle of superposition.Uniform circular motion An object that moves around a circular path at a steady speed is described as having uniform circular motion. c In the diagram, starting from the open end, there is a sequence ANANANA of antinodes and nodes, where A is an antinode and N is a node.

The light from the two slits is still coherent, even though it is now white and contains a mixture of wavelengths. Think about what happens in destructive and constructive interference when waves have different amplitude. Resistivity and resistance: harder problems This exercise gives you practice in some harder examples where you have to use R = ρl . Calculate the distance of each spacecraft from the centre of the Earth and the gravitational force on it (gravitational constant G = 6. We can divide this area into two parts: displacement = area of rectangle + area of triangle TIP Equation 1 defines acceleration.Iestyn Morris studied Physics at Aberystwyth before being awarded the Sir Granville Beynon prize there and graduating with first class honours for his degree. iii At points B, E, F and G, the path difference from the point to the two sources is _______________ iv The two waves arrive _______________ phase and they _______________ interfere. This exercise provides practice drawing electric fields and understanding the rules that should be followed. A student wants to obtain a large heating effect in a resistor connected to a laboratory power supply.

TIP When using tickertape timers, think about whether to count the dots or the spaces between the dots.Electrical power and energy This exercise provides practice in using several electrical formulae for power.

P and S P and T Q and R Q and S R and S e Describe where points with no phase difference will be found on a stationary wave. Thermometers and temperature scales There are many different types of thermometer: liquid-in-glass, thermocouple, electrical resistance etc. g The coherent light is replaced by light of the same wavelength, but from two different sources that are not coherent. c Calculate the increase in electrical potential energy when the +20 C charge is pushed from C to D. We can solve problems like this using the relationship: pV = constant T a What is the constant in this equation?

b Now, following the same procedure as in question 3, make a scale drawing and use it to deduce the magnitude and direction of the resultant force on the ship. c The box passes over a rough patch in the floor and the box slides in a straight line with a constant velocity. State whether the collisions between the particle and the walls of the cube are elastic or inelastic. Rearrange the equation that defines acceleration to find the height of the triangle in terms of a and t.