How many times does current change in one second? In public power distribution systems in the United States, (including household current), the voltage reverses itself 60 times per second. In some countries, the voltage reverses itself 50 times per second. The rate at which alternating current reverses direction is called its frequency, expressed in hertz. […]
Why is it important to be in the good fitness rating zone?
Why is it important to be in the good fitness rating zone? If your child’s score falls within the Healthy Fitness Zone it means they have achieved the recommended level of fitness for their age. So, your child will not be compared with other children. Your child will get personalized information on his or her […]
What element can make the most bonds?
What element can make the most bonds? Hydrogen Can an atom have 7 bonds? Meallic elements can definiely have more than eight valence electrons, however they do not tend to form covalent bonds. Therefore the maximum number of covalent bonds should be said to be 7, with the exception of some noble gases since they […]
What is an unhealthy simple sugar?
What is an unhealthy simple sugar? This type of sugar, called added sugar, is considered “bad sugar.” In its most processed and refined form (think the white powdery stuff we stir into coffee, or high fructose corn syrup in soft drinks and packaged foods), sugar has absolutely no nutritional value. Are bananas simple sugars? Your […]
Which has more momentum a heavy truck?
How did the environment of Earth develop over a period?
How did the environment of Earth develop over a period? All of the environments on Earth change over time. Some changes are caused by the slow movement of the continents (plate tectonics) and take millions of years. Other changes are caused by variations in Earth’s climate and take thousands of years. How did the environment […]
How do you know if correlation is positive or negative?
How do you know if correlation is positive or negative? We often see patterns or relationships in scatterplots. When the y variable tends to increase as the x variable increases, we say there is a positive correlation between the variables. When the y variable tends to decrease as the x variable increases, we say there […]
What is Laplace nebular theory?
What is Laplace nebular theory? Nebular Hypothesis, an explanation of how the solar system was formed, proposed by Pierre Simon de Laplace in 1796. Laplace said that the material from which the solar system was formed was once a slowly rotating cloud, or nebula, of extremely hot gas. The most serious concerns the speed of […]
What is the purpose of a node?
What is the purpose of a node? Node. js is primarily used for non-blocking, event-driven servers, due to its single-threaded nature. It’s used for traditional web sites and back-end API services, but was designed with real-time, push-based architectures in mind. Why is node so popular? Node. js can handle many concurrent requests. This is the […]
What is the purpose of reasons in a persuasive essay?
What is the purpose of reasons in a persuasive essay? What is a persuasive/argument essay? Persuasive writing, also known as the argument essay, utilizes logic and reason to show that one idea is more legitimate than another idea. It attempts to persuade a reader to adopt a certain point of view or to take a […]