What happens when a sound source is moving? When the sound source moves toward an observer, each successive wave is emitted closer to the observer than the previous wave and takes just a little less time to reach the observer than the previous one. Since the time between waves is reduced, the frequency is increased. […]
What are three properties of a permanent magnet?
What are three properties of a permanent magnet? 3 properties of a magnet: The three properties that all magnets have are that they all attract certain metals, they have north and south poles, and two of the same poles will repel each other, while opposite poles will be attracted to each other. Which metals do […]
Does an object on the ground have potential energy?
Does an object on the ground have potential energy? Potential energy is energy that is stored in a person or object. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object’s weight and its height above the ground (GPE = weight x height). Elastic potential energy is due […]
What happens when you mix sodium and chlorine?
What happens when you mix sodium and chlorine? If sodium metal and chlorine gas mix under the right conditions, they will form salt. The sodium loses an electron, and the chlorine gains that electron. This reaction is highly favorable because of the electrostatic attraction between the particles. In the process, a great amount of light […]
What are 3 differences between ionic and covalent bonds?
What are 3 differences between ionic and covalent bonds? An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms. The only pure covalent bonds occur between identical atoms. Ionic bonds form between a metal and a nonmetal. Covalent […]
What is the scientific method for identification?
What is the scientific method for identification? The acronym for a scientific method: Analysis, Comparison, Evaluation, and Verification (see individual terms). The acronym for Automated Fingerprint Identification System. The first step of the ACE-V method. The assessment of an impression to determine suitability for comparison. How do I know if I have systemic issues? We […]
How do you find the mass of a disc?
What happened to the pregnant wife in Chernobyl?
What happened to the pregnant wife in Chernobyl? One of the main characters in HBO’s miniseries “Chernobyl,” the pregnant wife of a young firefighter, still lives in Ukraine. The real-life Lyudmilla Ignatenko recently told the BBC that reporters have accused her of killing her unborn child. Why did Chernobyl cause birth defects? A 2010 study […]
What is the function of helicase in DNA replication?
What is the function of helicase in DNA replication? DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied. During DNA replication, DNA helicases unwind DNA at positions called origins where synthesis will be initiated. What is the function of DNA polymerase III? The […]
How much energy does it take to remove an electron from magnesium?
How much energy does it take to remove an electron from magnesium? Magnesium has the electron configuration of 1s22s22p63s2. The first two electrons are removed from the third level. The third electron is removed from the second level. Electrons in lower levels feel a greater attraction to the nucleus and are more difficult to remove….Ionization […]