Category: Physics

What is the level of intensity of your physical activity in general? Typically, the intensity of physical activity can be described as light, moderate or vigorous. To benefit health, Australia’s Physical Activity and Sedentary Behaviour Guidelines recommend a variety of moderate and vigorous intensity physical activity. What is RPE level? Perceived Exertion (Borg Rating of […]

What is the half life of a first-order reaction if time required to decrease? Concentration is reduced to 25%. It means it takes two half-lives to decrease the concentration of reactant from 0.8 M to 0.2 M in first-order reaction. Hence, half-life of the reaction is 12/2 = 6 hours. The half life of reaction […]

How much does it cost to replace a vent valve? The cost to replace a purge valve in your car is generally between $110-$170, with the parts being the expensive price of the replacement, coming in at an average of $75-$110, while the labor usually only runs at about $50, meaning this is a quick […]

Is it hard to get a 9 in GCSE? While getting a 9 in GCSE Maths is difficult, it is not an impossible achievement. Put in the practice and hard work now and you’ll have a very good chance of nailing it in your exams and getting the grade you’re after. What percentage is a […]

Does the temp affect the bounce of a ball? One factor that can influence the bounce of a ball is the temperature of the ball. A warmer ball will bounce higher than a cold one. The reason for this is twofold. In a hollow ball, the change in temperature causes a change in air pressure […]

How much does it cost to get a safe opened? Locksmith Charge to Open Safe Opening Method Used Average Cost Range Open by manual manipulation $150 – $200 Fire Safe by Drilling $200 – $250 In-Floor Safe by Drilling $325 – $475 Money Safe by Drilling $350 – $400 How long does it take a […]

What are the 5 wave properties of light? You will investigate the wave properties of light: reflection, refraction, diffraction and interference. The light source is a helium-neon laser. Why Study Light? Physics is described as the study of matter and radiation. Is wave a property of light? Light has the properties of waves. Like ocean […]

What is the mass on moon? On the Moon, g = 1.6 N/kg. In other words, a 1 kg mass has a weight on the Moon of 1.6 N….Summary. Mass Weight Measured in kilogrammes kg Measured in newtons N A measure of the amount of matter The force of gravity acting on the object How […]

What are the derived units of density? Thus density is an intensive quantity. The SI derived unit for density is the kilogram per cubic meter (kg/m3). This unit is awkwardly large for most chemical applications. The unit g/cm3 and its equivalent, g/mL, are more commonly used for solid and liquid densities. Which one is derived […]

What kind of energy is a glowing firefly? This type of light production is called bioluminescence. The method by which fireflies produce light is perhaps the best known example of bioluminescence. When oxygen combines with calcium, adenosine triphosphate (ATP) and the chemical luciferin in the presence of luciferase, a bioluminescent enzyme, light is produced. What […]