Category: Physics

How do I know my PNP and NPN sensor? Watch the meter display as you force the sensor to output. If the readout changes to a number between 10 and 30, then the sensor output is a PNP type, also known as “sourcing.” If the meter display remains at “0”, then the sensor output is […]

Is reduction Exergonic or Endergonic? The dehydrogenase enzyme reduces acetaldehyde to ethanol, which is an endergonic (energy-requiring) reaction: The reduction of acetaldehyde is coupled to the oxidation of NADH to NAD+, which is an exergonic reaction. Do oxidation and reduction always occur together? So oxidation and reduction always occur together; it is only mentally that […]

What is the difference between horizontal and vertical bar graphs? The title of the horizontal bar graph tells about the data being represented by the graph. The vertical axis represents the data categories. The horizontal axis represents the values corresponding to each data value. When using the bar graph the width of the bars must […]

Who has played at the most World Cups? Soccer players with the most appearances at the FIFA World Cup from 1930 to 2018 Number of appearances Lothar Matthäus (Germany) 25 Miroslav Klose (Germany) 24 Paolo Maldini (Italy) 23 Uwe Seeler (Germany) 21 Has the US ever made it to the World Cup final? The United […]

Is 60 gigahertz harmful to humans? In addition to the very low power levels discussed above, 60 GHz systems do not penetrate the human body. As a result, exposure to 60 GHz is very similar to the exposure to sunlight ” but at 1/10,000 of the energy. Lower-frequency emissions penetrate and may even pass completely […]

How does stick flex affect your shot? The higher the flex number, the stiffer the hockey stick. Flex has a lot to do with how fast a player’s slap shot is. In the act of making a slap shot, the player will scrape the blade on the ice a few inches behind the puck. This […]

How is water turned into ice instantly? Sharply knock a bottle of supercooled liquid water on the table and it instantly turns to slushy ice before your eyes. You put a plastic bottle of soda pop or water in the freezer for a few minutes to get it ice cold. How long does it take […]

Is AB blood type dominant or recessive? ABO Blood Type Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive. Why do mosquitoes bite me and […]

What is the coldest item in the world? The protoplanetary Boomerang Nebula, located 5,000 light-years from Earth, holds the record for coldest known object in the Universe. Outflows of gas, streaming out from the central dying star, reach temperatures below -270 degrees Celsius. How long does volcanic ash stay in the air? three years Why […]

How mass of the ball affects the motion of the ball? Both encounter the same air resistance, but, the heavier ball has a greater downward force which overcomes the upward force of the air. The heavier ball will still reach a t erminal velocity. But, it will accelerate longer than the hollow ball, and its […]