What is the average frequency of a radio wave? Radio waves are a type of electromagnetic (EM) radiation with wavelengths in the electromagnetic spectrum longer than infrared light. They have have frequencies from 300 GHz to as low as 3 kHz, and corresponding wavelengths from 1 millimeter to 100 kilometers. What happens to the wavelength […]
What are the different characteristics of waves?
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 […]
What happens when you mix sulfur and vinegar?
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?
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?
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?
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 long does it take to develop a new product?
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 […]
How does an object get its weight?
Is 100 yuan a lot of money?
When can the water displacement method not be used?
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 […]