Category: Physics

How many degrees is a 6% grade? Slopes vs. gradients vs. % grades Slope Angle (degrees) Gradient Grade (%) 5 1 8.75 5.74 1 10 6 1 10.5 What is a 360 angle called? A 180° angle is called a straight angle. Angles such as 270 degrees which are more than 180 but less than […]

Can you wire a 3 pin plug with 2 wires? No, it’ll be fine. You need an earth wire when you’ve got metal casings on appliances; the earth wire provides a preferred path to ground for a fault which results in the casing becoming live (ie, a preferred path to that path being ‘you’). Can […]

Is sodium and magnesium an ionic compound? There is a strong electrostatic force of attraction between these oppositely charged ions – this is called an ionic bond. The slideshow shows ionic bonds being formed in sodium chloride, magnesium oxide and calcium chloride. How do you combine ionic charges? To find the formula of an ionic […]

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 […]

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 […]

How do you figure out how much a trip will cost? What is the cost of a road trip? determine the number of miles you will travel (google maps provides a good ballpark figure) divide the number of miles by your car’s mpg (the number of miles you travel per gallon of gas) multiply that […]

What are 2 similarities and 2 differences between ionic and covalent bonds? The molecules that are formed from the ionic and covalent bonds are neutral. This is because, in an ionic bond, two opposite charges cancel each other while in a covalent bond, neutral components shared the pair of electrons. Ionic and covalent, both are […]

How is projectile motion used in real life? In real life, the projectile motion finds applications in sports. Playing basketball, football is examples of projectile motion in real life. While throwing a basketball into the basket, the player shoots the ball in such a way that the flight taken by the ball is in the […]

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) […]

What cells do plants have that animals don t? Animal cells have centrosomes (or a pair of centrioles), and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not. Why are plant cells Square? Plant cells […]