What is the most important instrument for comparing bullets? These bullets are then examined using a comparison microscope. The firearms examiner’s best tool is the comparison microscope, which is used to examine two different objects, bullets in this case, simultaneously. This lets the examiner compare the striations left on the fired bullets (2). Does the […]
Why does dynamic equilibrium occur?
Why does dynamic equilibrium occur? In chemistry, and in physics, a dynamic equilibrium exists once a reversible reaction occurs. Substances transition between the reactants and products at equal rates, meaning there is no net change. Reactants and products are formed at such a rate that the concentration of neither changes. What is the dynamic equilibrium […]
When did the last meteor hit Earth?
When did the last meteor hit Earth? 66 million years ago How much warning is there before an asteroid? According to expert testimony in the United States Congress in 2013, NASA would require at least five years of preparation before a mission to intercept an asteroid could be launched. Where did the last asteroid hit […]
What materials do you need to build a table?
What materials do you need to build a table? Tools Miter saw. Circular or table saw. Drill and bit set. 18ga finish nail gun. Paint brushes. Chalk line. Orbital sander. Pocket screw jig. How do I make a good study table? Choose a good chair, table, and lamp (any source of lighting is appreciated) first […]
Which two factors are responsible for many of the unique physical and chemical properties of water?
Which two factors are responsible for many of the unique physical and chemical properties of water? Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density. What are 3 physical properties of water? 1 Physical Agents. Physical […]
Is a ball falling a balanced force?
Is a ball falling a balanced force? Untitled Document. Let us consider the descent of a falling object: In the final drawing the speed of the falling object is such that the force associated with air resistance is the same as that of the gravitational force. . . the forces are now balanced. What forces […]
Which cable is used in ring topology?
Which cable is used in ring topology? coaxial cable Which topology is best? star topology Which topology is fastest? Which topology is used in schools? Ring Network Topology Ring network topologies are most often found on school campuses, though some commercial organizations also use them. FDDI, SONET, or Token Ring technology are typically used. Which […]
What is the value for acceleration due to gravity?
What is the value for acceleration due to gravity? 9.8 m/s2 Do astronauts wear G suits? Image to left: Astronauts wear G-suits to help prevent dizziness. They also wear rubberized full-body suits, called “G-Suits,” that can be inflated with air. The suit squeezes arms and legs to push the blood back and balance the pressure. […]
How do you find weight if you have pressure and area?
What is the period of 440 Hertz?
What is the period of 440 Hertz? 1 Hertz corresponds to 1 oscillation/second. Once we understand the meaning of a pitch or frequency of 440 Hz, we can ask a related question: how long does 1 oscillation of the vibrating string take? If the string oscillates 440 times in 1 second, then each oscillation will […]