Category: Physics

What can a green leaf be compared to? A green leaf is compared to a factory as it manufactures food for the plant. Does photosynthesis occur in leaves? In plants, the process of photosynthesis takes place in the mesophyll of the leaves, inside the chloroplasts. Chloroplasts contain disc-shaped structures called thylakoids, which contain the pigment […]

How do you interpret Q1 and Q3? The first quartile, denoted by Q1, is the median of the lower half of the data set. This means that about 25% of the numbers in the data set lie below Q1 and about 75% lie above Q1. The third quartile, denoted by Q3, is the median of […]

Do projectiles have a predictable path? Projectiles do not follow a predictable path. Where will the ball have the smallest speed? The speed is smallest at the highest point of its flight path because the y- component of the velocity is zero. At what point of the projectile path the speed is i minimum and […]

Who pollutes the most in the world? China Is Lamb worse than beef for the environment? This blog post draws on data and research discussed in our entry on Environmental impacts of food production and CO2 and Greenhouse Gas Emissions. Beef and lamb, in particular, have much higher greenhouse gas emissions than chicken,pork, or plant-based […]

What does not affect braking distance? Visibility is one of a number of factors that do not affect your braking distance per se but can inhibit your thinking distance. The longer it takes for you to spot hazards in the road, the more time will have passed before you hit the brake pedal. What factors […]

How do I find the mean of a frequency table? To find the mean add all the ages together and divide by the total number of children. How do you find the mean median and mode on a histogram? Mode = peak of dataset so, whichever bar of histogram is tallest, the mid point of […]

What note is 786 Hz? The frequency of the third harmonic of middle C is 3 X 262 Hz = 786 Hz. These harmonic frequencies are the same no matter what instrument produces the middle C. How do you reduce harmonics? There are a number of methods to modify adverse system responses to harmonics: Add […]

How do you use a pulley to multiply forces? To lift something four times heavier, you can use exactly the same force but only if you pull the rope four times further. If you look at what’s happening on both sides of a pulley, and multiply the force by the distance moved, you’ll find it’s […]

Do more bushels of potatoes grow when the soil is fertilized? An investigation found that more bushels of potatoes were produced when the soil was fertilized more. Students measured the temperature of the water at different depths in Lake Skywalker and found that the temperature varied. Does potatoes need to be fertilized? As you will […]

What Cannot be burned by fire? Riddle: What can’t be burned in fire, nor drowned in water? Answer: Ice. What is a fire risk? A fire risk is the likelihood of a fire occurring and the consequences of that fire should one occur. 4. The legally defined Responsible Person under the Regulatory Reform (Fire Safety) […]