When neutrons split nuclei by fission and extra neutrons are produced which can split further nuclei. Large quantities of energy are produced. Reducing A source has an activity of 1800 kBq after being stored for 72 s. If the half life is 24 s, what was its initial activity? Now you’ve finished the dynamics & space unit, try some past paper questions from old credit & intermediate 2 exam papers. A source has an activity of 3200 kBq and a half life of 5.3 days. What is its activity 37.1 days later? A source has an activity of 800 kBq after being stored for 4 days. If the half life is 1 day, what was its initial activity?

Chemcord have kindly giving permission to upload these questions here. If you thought they were useful you can buy the National 5 Revision books soon: Many light sources produce a continuous spectrum containing all the wavelengths of visible light, e.g. an ordinary light bulb. Watch this BBC Bitesize video about the ways that fuses and RCDs help protect us from electrocution. Here are some videos on balanced and unbalanced forces affecting the motion of objects. The first clip examines the forces on a cyclist as she cycles round a velodrome. This short video shows a night-time re-entry over Mexico, with the orbiter on its way to land at the Kennedy Space Centre. There are no engines running, all that heat is being produced by re-entry to the atmosphere.Use the formula to find the number of half lives (this will be the number of arrows) No. of t ½ = time÷ t½

The activity of a source drops from 4096 kBq to 1 kBq in 2 days. Calculate the half life of the source. Mass is a measure of the amount of matter in an object. It is measured in kilograms. Wherever you go your mass stays the same.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. In six years, the activity of a radioactive isotope drops from 200 kBq to 25kBq. Calculate the half-life of the isotope. Here are the Intermediate 2 Physics Papers. The table isn’t yet complete, but you might want to start looking over some questions. Many of these could pop up on National 5 papers. Int 2 Papers Given that it takes 8 minutes for light to get from the sun, how far is it away is it from the Earth? By Voyager_Path.jpg: created by NASAderivative work: Hazmat2 (talk) – Original from http://solarsystem.nasa.gov/multimedia/display.cfm?IM_ID=2143This file was derived fromVoyager Path.jpg:, Public Domain, https://commons.wikimedia.org/w/index.php?curid=18049439

A source has an activity of 1800 kBq and a half life of 2 days. What is its activity 10 days later? Now you’ve finished the electricity & energy unit, try some past paper questions from old credit & intermediate 2 exam papers. If you’ve read all that stuff on forces, take a break to watch the Glesga Physics Newton’s Laws video Have you ever thought about explaining science topics using only the most popular 1000 words? Here’s an attempt to describe going into space… 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.colour temperature line spectra summary of the information we can get from the light received from any star (surface temperature of the star, what the start is made of, etc.) Light does not travel at an infinite speed. It takes time to travel. It is so fast that we do not usually notice, although out in space the distances involved are so big that light takes a reasonable amount of time to reach us. There are many parts of space that are detected by different types of telescope. Use your knowledge of physics to describe one telescope that is used in astronomy. A geostationary satellite is not actually stationary. By rotating at the same rate as the Earth, the satellite always appears to sit in the same point in our sky. This is quite handy, since it would be a nuisance if we had to move dish aerials to follow the location of a satellite broadcasting our TV signals.

This table contains links to past papers from the SQA National 5 Physics exam. These papers and solutions are reproduced to support SQA qualifications on a non-commercial basis according to SQA conditions of use. Notice how the presenter converts the current from mA to A before doing the calculation in his example. The activity of a source drops from 720 MBq to 45 MBq in 20 years. Calculate the half life of the source.

6 Past Papers found

This unit contains more equations but remember that the relationship sheet you are given during the exam will have these, so don’t panic if you forget one of them. A source has an activity of 576 MBq and a half life of 30 years. What is its activity 180 years later? You should now have had plenty of practice at finding the half life graphically, nothing should phase you now. 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.