Why is Group 2 called alkaline earth metals? Beryllium, magnesium, calcium, strontium, barium and radium are the elements in Group 2. For two reasons, these elements are referred to as Alkaline Earth metals, Their oxides remain in the crust of the earth and are very heat-stable. Can Helium be made by man? Helium is all […]
What is the difference between CFM and RPM?
What is the difference between CFM and RPM? RPM will usually determine both how loud the fan will be and the pitch it’ll produce. CFM matters when choosing a fan, but so does the airflow/pressure optimization. Which is more important CFM or RPM? Fans cool by moving air, which is measured in Cubic Feet per […]
What did most billionaires study?
What did most billionaires study? The most common degrees held by the world’s richest people per country are business and finance, economics, and engineering, while around one-quarter dropped out of their studies or skipped a university education altogether. Who was the 1st billionaire? In 1916, Rockefeller was announced as the country’s official first billionaire, with […]
What are the 2 types of anxiety?
What are the 2 types of anxiety? What are the five major types of anxiety disorders? Generalized Anxiety Disorder. Obsessive-Compulsive Disorder (OCD) Panic Disorder. Post-Traumatic Stress Disorder (PTSD) Social Phobia (or Social Anxiety Disorder) What kind of therapy is best for anxiety? Cognitive behavioral therapy (CBT) is the most widely-used therapy for anxiety disorders. Research […]
What is an example of ionizing radiation?
What is an example of ionizing radiation? A familiar example of ionizing radiation is that of x-rays, which can penetrate our body and reveal pictures of our bones. Ionizing activity can alter molecules within the cells of our body. That action may cause eventual harm (such as cancer). Intense exposures to ionizing radiation may produce […]
What does it mean if cross product is zero?
What does it mean if cross product is zero? If two vectors have the same direction or have the exact opposite direction from one another (i.e., they are not linearly independent), or if either one has zero length, then their cross product is zero. What is the dot product used for? The dot product essentially […]
What is combination and give example?
What is combination and give example? The reactions in which two or more substances combine to form a single product are known as combination reactions. Example: When magnesium ribbon is burnt in air, magnesium oxide is formed. 2Mg + O2 2MgO. How do you calculate combinations? Remember, the formula to calculate combinations is nCr = […]
What is the meaning of accuracy?
What is the meaning of accuracy? freedom from mistake or error Why is accuracy of information important? 1. Data Accuracy Enables Better Decision Making. The highest data quality provides a certain level of confidence to all who depend on that data. If data quality is high, the users will be able to produce better outputs. […]
How do you find the velocity of a falling object?
What is the coefficient of friction equal to?
What is the coefficient of friction equal to? The coefficient of friction is defined as the ratio of friction force to the normal force, μ = F /N . Consider the following two cases: One measures the force of static friction and the other the force of kinetic friction. At constant velocity to the Right, […]