Can a cyclic group be infinite? Every cyclic group is virtually cyclic, as is every finite group. An infinite group is virtually cyclic if and only if it is finitely generated and has exactly two ends; an example of such a group is the direct product of Z/nZ and Z, in which the factor Z […]
How do you determine the state of matter in a chemical equation?
How do you determine the state of matter in a chemical equation? Notation for a Chemical Equation The state of matter of each compound or molecule is indicated in subscript next to the compound by an abbreviation in parentheses. For example, a compound in the gas state would be indicated by (g), solid (s), liquid […]
What two species are involved in Commensalism?
What two species are involved in Commensalism? Commensalism is a type of relationship between two living organisms in which one organism benefits from the other without harming it. A commensal species benefits from another species by obtaining locomotion, shelter, food, or support from the host species, which (for the most part) neither benefits nor is […]
Why can humans not fly?
Why can humans not fly? Humans will never fly by flapping our arms with wings attached, says Mark Drela, Terry J. Kohler Professor of Fluid Dynamics in the Department of Aeronautics and Astronautics. The arms and chest of a human do not have anywhere near enough muscle mass to provide the necessary power. What are […]
Is threshold frequency the same for all metals?
Is threshold frequency the same for all metals? Different metals have different values of work function because of difference in their electronegativity. The frequency of the photon with energy equal to work function is called threshold frequency. The value of photocurrent depends on the intensity of the falling radiation. Why is there a threshold frequency? […]
What is the correct pathway of light through the eye?
What is the correct pathway of light through the eye? Light passes through the front of the eye (cornea) to the lens. The cornea and the lens help to focus the light rays onto the back of the eye (retina). The cells in the retina absorb and convert the light to electrochemical impulses which are […]
What does a wave carry from place to place?
What does a wave carry from place to place? Waves carry energy from one place to another. Because waves carry energy, some waves are used for communication, eg radio and television waves and mobile telephone signals. For example, water waves have to travel in water. Sound waves need a solid, a liquid or a gas […]
What is the magnitude of a displacement?
What is the magnitude of a displacement? Magnitude of displacement is equal to the absolute value of the displacement vector. In physical sense, the magnitude of displacement is equal to the linear distance between initial and final positions along the straight line joining two positions i.e. the shortest distance between initial and final positions. Does […]
How do you calculate the energy of a rubber band?
How do you calculate the energy of a rubber band? Elastic potential energy (measured in the unit joules) is equal to ½ multiplied by the stretch length (“x”) squared, multiplied by the spring constant “k.” The spring constant is different for every rubber band, but can be figured out (see “Welcome to the Guide to […]
What are three levels of public health agencies in the United States?
What are three levels of public health agencies in the United States? PRIMARY, SECONDARY, AND TERTIARY. LEVELS OF CARE AND PREVENTION. The Three Levels of Care. What are the four components of public health? What Are the Implications of Each of the Four Components of Public Health? Health. For most of the history of public […]