What was the Alvarez theory? theory formulated by American scientists Walter and Luis Alvarez. This theory states that the impact of an asteroid on Earth may have triggered the extinction event by ejecting a huge quantity of rock debris into the atmosphere, enshrouding Earth in darkness for several months or longer. What is the evidence […]
How does follow through effect?
How does follow through effect? Instead, the follow-through increases the time of collision and subsequently contributes to an increase in the velocity change of the ball. By following through, a hitter can hit the ball in such a way that it leaves the bat or racket with more velocity (i.e., the ball is moving faster). […]
What is physiology simple words?
What is physiology simple words? 1 : a branch of biology that deals with the functions and activities of life or of living matter (such as organs, tissues, or cells) and of the physical and chemical phenomena involved — compare anatomy. How many types of physiologist are there? Hippocrates coined the theory of the four […]
What does dilation mean in math?
What does dilation mean in math? similarity transformation Is scale factor new over old? For figures which differ by a scale factor, the scale factor is the ratio of corresponding side lengths (new image to old image). What does a scale factor of 5 mean? Share on. Statistics Definitions > A scale factor is a […]
Where should an object be placed in order to use a convex lens as a magnifying glass?
Is the torque positive or negative?
Is the torque positive or negative? Counterclockwise is the positive rotation direction and clockwise is the negative direction. For example, a torque that rotates an object counterclockwise is a positive torque (see figure 6 below). What is torque and speed? Torque is the rotational equivalence of linear force. Speed measures the distance covered in unit […]
Why 100 efficiency is impossible?
Why 100 efficiency is impossible? It is impossible for heat engines to achieve 100% thermal efficiency () according to the Second law of thermodynamics. This is impossible because some waste heat is always produced produced in a heat engine, shown in Figure 1 by the term. Which engine is most efficient? Wärtsilä 31SG Which is […]
Can the president declare war?
Can the president declare war? The Constitution of the United States divides the war powers of the federal government between the Executive and Legislative branches: the President is the Commander in Chief of the armed forces (Article II, section 2), while Congress has the power to make declarations of war, and to raise and support […]
Is Yule a Celtic?
Is Yule a Celtic? Druids, the priestly class in ancient Celtic society, celebrated the festival of Alban Arthuan (also known as Yule) at the time of the Winter solstice. It was on this day that they ceremonially gathered mistletoe from oak trees. What are the traditions of Yule? Here are some customary ways to celebrate […]
What is the importance of good conductors of heat and electricity?
What is the importance of good conductors of heat and electricity? All metals are good conductors of heat and they are different in conducting the heat, which means that some metals conduct the heat faster than the other, The heat makes us comfortable and helps us to prepare our food and it is an interesting […]