Category: Physics

What could be the cause of a loud hum coming from a transformer? Electric hum around transformers is caused by stray magnetic fields causing the enclosure and accessories to vibrate. Magnetostriction is a second source of vibration, in which the core iron changes shape minutely when exposed to magnetic fields. Around high-voltage power lines, hum […]

What two Nobel prizes has Marie Curie awarded? Together with her husband, she was awarded half of the Nobel Prize for Physics in 1903, for their study into the spontaneous radiation discovered by Becquerel, who was awarded the other half of the Prize. In 1911 she received a second Nobel Prize, this time in Chemistry, […]

What is mental commitment and what are the four components of mental commitment? Mental commitment is the ability to focus on the required objectives and specific responsibilities at hand. The four components of mental commitment are concentration, confidence, control, and commitment. How do you improve a team performance include all of the following except? The […]

What is the role of manipulative variable in EC? Lesson Summary The manipulated variable is something that is changed on purpose in an experiment. All other variables are carefully monitored during the experiment. The responding variable is measured to see if changing the manipulated variable causes something to happen. Why is it important to control […]

What is the motto of NDRF? Saving Lives and Beyond What is the salary of NDRF? 5.2 lakhs Is Ndrf a government job? www.ndrf.gov.in website is official NDRF Career Portal there you can check new NDRF Vacancy 2021 details. We are also telling you in this article current NDRF Vacancy 2021 details. Candidates who are […]

Why would a hunter choose to use a shotgun with slugs instead of a rifle? What slugs can be used in a shotgun? Why would a hunter choose to use a shotgun with slugs instead of a rifle? A slug from a shotgun will generally travel less far than a bullet from a rifle and […]

Can a white dwarf die? The white dwarf is considered “dead” because atoms inside of it no longer fuse to give the star energy. But it still “shines” because it is so hot. Eventually, it will cool off and fade from view. Our Sun will reach this death about 8 billion years from now. Is […]

How do stomata work? Stomata are tiny holes found in the underside of leaves. They control water loss and gas exchange by opening and closing. They allow water vapour and oxygen out of the leaf and carbon dioxide into the leaf. In low light the guard cells lose water and become flaccid , causing the […]

How do you know if your soccer ball has enough air? If it doesn’t have enough air pressure inside, the ball won’t go straight, and it will not travel as far as you want it to. If you overinflate the soccer ball, it will not be as easy to kick, and it could pop if […]

What did Lombroso believe? Essentially, Lombroso believed that criminality was inherited and that criminals could be identified by physical defects that confirmed them as being atavistic or savage. A thief, for example, could be identified by his expressive face, manual dexterity, and small, wandering eyes. Who is the father of modern American criminology? Cesare Lombroso […]