What do radio waves visible light and gamma rays all have in common? Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation. Electromagnetic radiation can be described in terms of a stream of mass-less particles, called photons, each traveling in a wave-like pattern at the speed of […]
What are the four principles of stratigraphy?
What are the four principles of stratigraphy? Steno’s laws of stratigraphy describe the patterns in which rock layers are deposited. The four laws are the law of superposition, law of original horizontality, law of cross-cutting relationships, and law of lateral continuity. Nicolaus Steno was a 17th-century Danish geologist. Which kind of unconformity is probably the […]
What are the three roles of bacteria?
What are the three roles of bacteria? In summary, bacteria are single-celled microbes without a nucleus. Bacteria play many roles in our ecosystem. Bacteria are decomposers which break down dead material and recycle it. They also can be producers, making food from sunlight, such as photosynthetic bacteria, or chemicals, such as chemosynthetic bacteria. What are […]
What does the slope of displacement time graph gives?
What does the slope of displacement time graph gives? A sloping line on a displacement-time graph shows that the object is moving. In a displacement-time graph, the slope or gradient of the line, is equal to the velocity of the object. The steeper the line (and the greater the gradient) the faster the object is […]
What is wavelength called?
What is wavelength called? Wavelength is commonly designated by the Greek letter lambda (λ). The term wavelength is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids. What is the formula of Hertz? Physical value symbol unit Cycle duration T = 1 […]
What has 16 protons and 18 neutrons?
What has 16 protons and 18 neutrons? Sulfur – S Is beryllium expensive? BERYLLIUM IS A MATERIAL LIKE NO OTHER. Ninety-eight-percent pure beryllium is expensive, selling from $600 to $800 per pound prior to machining, so shops must understand its machining idiosyncracies to avoid scrapping progressively expensive parts. What’s the strongest alloy on earth? Steel […]
How accurate are home DNA testing kits?
How accurate are home DNA testing kits? Since most of us aren’t geneticists, it can seem daunting. But here’s the bottom line: “Are home paternity tests accurate?” Yes! You can expect to see the exact same results for a home paternity test as you would for a legal, court-admissible test if all DNA samples submitted […]
How do plants and animals get the energy they need?
How do plants and animals get the energy they need? Most, if not all plants are producers, and they make their own food using sunlight and raw materials, through a process called “photosynthesis”. Plants get their energy in form of starch whereas animals get it in form of glycogen. In which light photosynthesis is maximum? […]
What does a 1% agarose gel mean?
Which objective lens should you always use first when viewing a new slide?
Which objective lens should you always use first when viewing a new slide? 3. When focusing on a slide, ALWAYS start with either the 4X or 10X objective. Once you have the object in focus, then switch to the next higher power objective. Re-focus on the image and then switch to the next highest power. […]