Joined in 2023 
82 
63 About this deal
gravitational field strength, g, is the weight per unit mass. It is measured in Newtons per kilogram. It is the force of gravity or pull on each kilogram of mass.
Watch this BBC Bitesize video about the ways that fuses and RCDs help protect us from electrocution. In six years, the activity of a radioactive isotope drops from 200 kBq to 25kBq. Calculate the half-life of the isotope. You should now have had plenty of practice at finding the half life graphically, nothing should phase you now. It is measured in units of time, e.g seconds, minutes, days, years, millions of years!) Note the SQA do NOT accept: Time for radiation/radioactivity/ count rate to half
Conditions of use
Use your knowledge of physics to comment on what the ball’s horizontal distance from the edge of the table would and would not depend on. 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. A source has an activity of 1800 kBq and a half life of 2 days. What is its activity 10 days later? 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.
The activity of a source drops from 1000 kBq to 125 kBq in 9 days. Calculate the half life of the source. Some light sources emit only some wavelengths. They produce a line spectrum. Each line corresponds to a particular wavelength.Principle components of galaxies. Living stars emit radiation across the electromagnetic spectrum. Peak depends on the heat of the surface. EITHER: Using your knowledge of physics, explain how this space probe was able to reach the outer planets. 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. half life Questions A print out for those who would like a copy of the National 5 Chemcord revision questions on half life. Here are the questions written out: HALF LIFE QUESTIONS Weight is the force of gravity acting on an object pulling it towards the centre of the Earth or any other large mass. Weight is a force and so is measured in Newtons. The weight of an object varies depending on where you are (which planet etc and how far you are from it’s surface, the further away from the surface the smaller is your weight)..
Can you use the kinetic theory of gases to describe the pressure-temperature, pressure-volume or volume-temperature relationships? If you are having difficulties with this, try reading this blog post.A source has an activity of 40 kBq after being stored for 10 years. If the half life is 2 years, what was its initial activity? A source has an activity of 40 MBq and a half life of 15 s. How long will it take for its activity to drop to 625 kBq? The activity of a radioactive source decreases time. However the rate of decrease slows with time. Because of this, and because the decay of individual atoms is random and unpredictable, theoretically a radioactive source will never completely lose all of its activity. The time taken for half of the atoms in a radioactive sample to decay is a constant for that source called the half-life of the source. So the half-life of a radioactive source is the time period during which the activity of the source falls to half of its original value. The half-life of some sources is as low as a fraction of a second; for others it is many thousands of years. Many light sources produce a continuous spectrum containing all the wavelengths of visible light, e.g. an ordinary light bulb.
Apparatus: Geiger-Muller tube, Scaler counter or ratemeter, Source (eg.sealed protactinium-234 radioactive source and drip tray). 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. 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.
National Qualifications
The activity of a source drops from 4800 kBq to 150 kBq in 10 days. Calculate the half life of the source. Inertia is the property of an object which makes it hard to get an object to move, or to stop a moving object. Inertia varies with mass, so the bigger your mass the bigger your inertia.. 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. A source has an activity of 3200 kBq and a half life of 5.3 days. What is its activity 37.1 days later?
Great Deal 
New Comment