National 5 Physics Practice Exam Papers (Sqa National 5) (Practice Papers for SQA Exams)

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A gravity assist around a planet changes a spacecraft’s velocity (relative to the Sun) by entering and leaving the gravitational field of a planet. The spacecraft’s speed increases as it approaches the planet and decreases while escaping its gravitational pull. Because the planet orbits the sun, the spacecraft is affected by this motion during the manoeuver. To increase speed, the spacecraft flies with the movement of the planet (taking a small amount of the planet’s orbital energy); to decrease speed, the spacecraft flies against the movement of the planet. The sum of the kinetic energies of both bodies remains constant. The activity of a source drops from 4800 kBq to 150 kBq in 10 days. Calculate the half life of the source.

The events will focus on the Physics coursework that is returning for session 2023-24. They are mainly aimed at teachers and lecturers who are delivering the coursework for the first time. You should now have had plenty of practice at finding the half life graphically, nothing should phase you now. As soon as source has been used, return it to its safe storage container, to avoid unnecessary contamination. Here are the results for the Indium-116 half life experiment. Warning, do not plot a graph in 15 minute intervals or you will have more difficulty finding the half life. Make the scale ten minute intervals.Use the formula to find the number of half lives (this will be the number of arrows) No. of t ½ = time÷ t½

Distance. Radiation obeys the inverse square law, as you double the distance from a source the level you are exposed to decreases by ¼ . Using tongs is an effective method of keeping your distance from a source. Unauthorised people must not be allowed to handle radioactive substances. In particular, in the United Kingdom, no one under 16 years of age may handle radioactive substances. Is one or more suns surrounded by orbiting planets. Our solar system is composed of the sun, 9 known planets and at least 44 moons, thousands of “minor planets” (asteroids) meteors and perhaps billions of comets. We can measure the Activity of a radioactive source using a Geiger-Müller tube. Watch this video to see how they work. Apparatus: Geiger-Muller tube, Scaler counter or ratemeter, Source (eg.sealed protactinium-234 radioactive source and drip tray).In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist manoeuvre, or swing-by is the use of the relative movement (e.g. orbit around the Sun) and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft. This saves fuel, time, and expense. Gravity assistance can be used to increase or decrease its speed or redirect the path of a spacecraft. The “assist” is provided by the motion of the gravitating body as it pulls on the spacecraft. It was used by interplanetary probes from Mariner 10 onwards, including the two Voyager probes’ notable flybys of Jupiter and Saturn. DOUBLE the final activity for the number of t ½ eg If you have 4 half lives double the final activity 4 times. NB DO NOT MULTIPLY BY 4 The activity of a source drops from 4096 kBq to 1 kBq in 2 days. Calculate the half life of the source.