This is an exercise that considers spacecraft and satellites in different types of orbits around the Earth. Some simple calculations can be done just by recognising that resistance is proportional to length and inversely proportional to area.

This question relates to the derivation of the relationship between the pressure p of a gas and the motion of its particles. b Calculate the frequency heard by the observer as the aircraft moves away from him at the same speed. On the lower set of axes, sketch the corresponding acceleration–time graph using the information you have deduced above. a Draw a free body diagram to represent these forces acting on a fish as it moves horizontally through water. ii Calculate the speed of an α-particle which has approximately the same energy as the β− -particle.But gases at low pressures behave very much like ideal gases, so the idea of an ideal gas is very useful. kg) 2 As with any electric field, we can draw field lines to represent the field around a point charge. a State whether the volume of the gas will increase or decrease as the temperature increases at constant pressure. Picture a collision in which a moving object collides with a stationary object; they stick together. You should describe any similarities and differences in the amplitude and in the phase difference between the points.

Use the graph to deduce: a the displacement of the runner after 75 s b the time taken by the runner to complete the first 200 m of the race c the runner’s velocity. a As represented in the diagram of a solid, each atom is in contact with a number of neighbouring atoms. a Use the kinetic model of matter to explain why the gas exerts a pressure on the walls of the container. The upthrust of the water on the block arises because the pressure of the water produces a greater force on the lower surface of the block than on the upper surface.

b Use your definition of pressure to show that the pressure p at depth h in a liquid of density ρ is given by the expression p = ρgh, where g is the acceleration of free fall. g If the frequency of an oscillation increases, state whether its period increases, decreases or stays the same.

If its mass is 20 kg, by how much has its gravitational potential energy increased when it is lifted to point B, 2. v State and explain how the signal-to-noise ratio changes as the length of the coaxial cable increases. Two important types of electrical thermometer are the resistance thermometer and the thermocouple thermometer. d State the distance in centimetres between a node and the nearest antinode and compare this distance with the wavelength λ of the progressive wave. This exercise provides practice drawing electric fields and understanding the rules that should be followed.U undergoes a series of nuclear decays, as shown by the arrows in this 5 A nucleus of uranium 238 92 diagram.

c State what happens to the drift velocity if the diameter of the wire is doubled and the current is unchanged. the amount of energy changed from other forms into electrical energy per unit charge produced by an electrical supply potential difference (p. c Suggest a point at which the charge could be placed so that the resultant electric force on it would be zero.

How superposition leads to stationary waves This exercise gives you practice using graphs of stationary waves and in applying the principle of superposition. Air resistance acts in the opposite direction to the ball’s velocity and increases as its velocity increases. Exam-style questions allow students to thoroughly prepare for examinations and check answers which are provided on the CD-ROM at the back of the book. d Suggest how the experiment can be used to determine how the speed of the wave on the string depends on the tension in the string. This exercise also contains practice in writing out an experiment and describing precautions for an electrical experiment.