Category: Physics

What are the different characteristics of waves? Waves are disturbances that travel through a fluid medium. Several common wave characteristics include frequency, period, wavelength, and amplitude. There are two main type of waves, transverse waves and longitudinal waves. Let’s talk about wave characteristics. How much time do you have to escape a tsunami? A tsunami […]

How long does it take to develop a new product? If you have an experienced product developer on your founder team, and you have a product of moderate complexity, then you should be able to get your first prototype within about 3 months, and a final works-like-looks-like prototype within about 6-9 months. Which of the […]

What happens when you mix sulfur and vinegar? hydrogen sulphide, formula H2S. This compund forms by a chemical reaction between the vinegar (an acid) and small amounts of metal sulphides (= compounds of a metal and sulphur). It has the well-known rotten-egg odour. These metal sulphides may be present in the ashes or may be […]

Does indigo powder smell bad? A: A natural indigo vat has a unique smell somewhere between earthy, musty, smoky with a hint of grass and manure! The indigo pigment that comes in your bottle is actually a fermented extract from a plant. Why is indigo powder not working? If it is too thick and hard […]

Why are lays so empty? The cushion actually is nitrogen gas. Chip manufacturers fill bags with this preservative gas to help keep chips fresh. If it were filled with regular air, the chips would likely turn soggy and spoil. Why are crisp bags so empty? Manufacturers claim the space left in crisp packets is needed […]

Why do plates move apart? The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth’s mantle and fit snugly against one another. The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other. […]

How does an object get its weight? The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton. Density is mass/volume. Is the weight of an […]

Is 100 yuan a lot of money? During my stay in Beijing, I’ve quickly found that one of the greatest parts of the city is the amount of fun you can have without breaking your bank. One hundred yuan, the equivalent of about $14.50 USD, goes much further here than most other cities in the […]

When can the water displacement method not be used? Water displacement method to determine volume of a solid can’t be used for all solids. The reason for this is some solids will float on the water. Therefore the object’s density is less dense than the water. 3. Why is the displacement method used? The displacement […]

Can cause a change in motion? A force is a push or pull that can cause an object to move, stop, or change speed or direction. 3. The greater the force, the greater the change in motion. Gravity (the earth’s pulling force) and friction (the force between two surfaces) are common forces that work against […]