Can a 7 year old start her period? Now the average age for a first period is closer to 12, with one University of Cincinnati study reporting that about 10 to 15 percent of girls enter puberty at age 7 or younger, a phenomenon known as precocious puberty. This is up from just 5 percent […]
How does the Industrial Revolution affect the evolution of the peppered moth?
How does the Industrial Revolution affect the evolution of the peppered moth? After the pollution from the Industrial Revolution started affecting trees, most of the collected peppered moths were of the dark form. Click for more detail. As the trees darkened with soot, the light-colored moths were easier to see. They lived longer and passed […]
What is the order of scientific inquiry?
What is the order of scientific inquiry? It usually consists of six steps: question, observation or investigation, hypothesis, experiment, analysis of data (reviewing what happened during the experiment), and conclusion. Which of the following is the correct order for the steps of scientific inquiry? The correct order of steps of scientific enquiry are observe, question, […]
What are the natural variables of Helmholtz free energy?
What are the natural variables of Helmholtz free energy? The natural variables are temperature, T, and volume, V . If the temperature and volume are held constant, the system will reach the equilibrium state (pressure, P, and entropy, S) with the minimum Helmholtz free energy. What are the four thermodynamic functions? Four important and useful […]
How do you give good reasoning?
How do you give good reasoning? Each time you make a choice, there are consequences. A good way to improve reasoning skills is to make a point of stopping to consider those consequences on a conscious level. Use your imagination. Before making a choice in a given situation, pause to imagine a variety of possible […]
What directly causes action potential?
What directly causes action potential? An action potential is caused by either threshold or suprathreshold stimuli upon a neuron. It consists of four phases; hypopolarization, depolarization, overshoot, and repolarization. An action potential propagates along the cell membrane of an axon until it reaches the terminal button. Which part of motor neuron has lowest threshold? axon […]
What is the ideal problem solving method?
What is the ideal problem solving method? IDEAL model consisting of five indictors including (1) Identify the problem: trying to identify problems and make them an opportunity to do something creative, (2) Define goals: set goals in a problem, (3) Explore solution: explore alternative approaches to solving problems, (4) Act on the strategy: anticipate results […]
Does Liquids have a fixed volume?
Does Liquids have a fixed volume? Liquids have a fixed volume but no fixed shape. Gases have no fixed volume and no fixed shape. Gases expand to fill the space available. They can also be compressed into a very small space. Do liquids have no fixed volume? Liquids, because they flow, can occupy whatever shape […]
What is the chemical equation of oxygen?
What is the chemical equation of oxygen? As we inspect this equation we see that there is one carbon atom on each side of the arrow and that there are two oxygen atoms on each side….5.2: Chemical Equations. Element Chemical Formula Hydrogen H2 Oxygen O2 Nitrogen N2 Fluorine F2 What type of reaction is C […]
What Hz is harmful?
What Hz is harmful? The most dangerous frequency is at the median alpha-rhythm frequencies of the brain, 7 hz. This is also the resonant frequency of the body’s organs. What frequency can kill humans? 7 hz What is the death frequency? As of 2020, the CIA estimates the U.S. crude death rate will be 8.3 […]