How do key beds help date rock layers? Like index fossils, key beds are used to match rock layers. A key bed is a thin layer of rock. The rock must be unique and widespread. For example, a key bed from around the time that the dinosaurs went extinct is very important. What is biostratigraphy […]
What is the half life of isotope B?
What is the half life of isotope B? There are 13 radioisotopes that have been discovered, with mass numbers from 7 to 21, all with short half-lives, the longest being that of 8B, with a half-life of only 770 milliseconds (ms) and 12B with a half-life of 20.2 ms. All other isotopes have half-lives shorter […]
Is the right to act in certain designated ways to directly influence others?
Is the right to act in certain designated ways to directly influence others? Authority is the right to perform or command. It allows its holder to act in certain designated ways and to directly influence the actions of others through orders. Which one of the following is a key difference between managerial and nonmanagerial employees? […]
How high can a helium balloon go?
How high can a helium balloon go? 9,000 meters What happens to a helium balloon in space? One is that atmospheric pressure is dramatically reduced at high altitudes, so a helium balloon expands as it rises and eventually explodes. But the elasticity of rubber decreases at very low temperatures so it is possible that helium […]
Who will be fined for not wearing a seatbelt?
Who will be fined for not wearing a seatbelt? By law, drivers must ensure that they and any other passenger in the vehicle are wearing their seatbelt, regardless of their age. However, passengers are still accountable, as both drivers and passengers aged 16 years and over can be fined if they fail to wear a […]
Why does the government have to pay to sustain green energy?
Why does the government have to pay to sustain green energy? There are a few common reasons used to justify a government role in renewable energy investment, including energy security and affordability, the potential for job creation, future economic strategic positioning, and addressing environmental and other externalities. What are the best renewable energy stocks? Renewable […]
Can a load be a resistor?
Can a load be a resistor? Devices called resistors are built to provide precise amounts of resistance in electric circuits. Any device that performs some useful task with electric power is generally known as a load. Sometimes resistor symbols are used in schematic diagrams to designate a non-specific load, rather than an actual resistor. What […]
What happens to light rays as it passes through a convex lens?
What happens to light rays as it passes through a convex lens? Convex Lens. Rays of light that pass through the lens are brought closer together (they converge). A convex lens is a converging lens. When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal […]
Who died in 2021?
Who died in 2021? Larry King, Christopher Plummer and Cecily Tyson are among the celebrities who died in 2021, leaving those in their wake heartbroken. Dustin Diamond died on February 1 at age 44 after a battle with stage IV small cell carcinoma. What famous people have died in 2021? Celebrity deaths 2021: All the […]
What is Chyme in the digestive system?
What is Chyme in the digestive system? Chyme, a thick semifluid mass of partially digested food and digestive secretions that is formed in the stomach and intestine during digestion. In the stomach, digestive juices are formed by the gastric glands; these secretions include the enzyme pepsin, which breaks down proteins, and hydrochloric acid. When is […]