Category: Physics

What makes a paper airplane fly better? Thrust is the forward movement of the plane. The initial thrust comes from the muscles of the “pilot” as the paper airplane is launched. Lift comes when the air below the airplane wing is pushing up harder than the air above it is pushing down. It is this […]

What is the most important organ in a human body? The brain What type of structure is the human body? An organism is a living being that has a cellular structure and that can independently perform all physiologic functions necessary for life. In multicellular organisms, including humans, all cells, tissues, organs, and organ systems of […]

How would you tell if a rock is crystalline? Crystalline rock, any rock composed entirely of crystallized minerals without glassy matter. Intrusive igneous rocks—those that congeal at depth—are virtually always crystalline, whereas extrusive igneous rocks, or volcanic rocks, may be partly to entirely glassy. What type of rock is shale? sedimentary rocks Is shale a […]

Is fire a plasma state? Fire is made up of many different substances, so it is not an element. For the most part, fire is a mixture of hot gases. If the flame is hot enough, the gases are ionized and become yet another state of matter: plasma. Burning a metal, such as magnesium, can […]

What is the minimum resultant force? Minimum resultant is when they direction is opposite : The magnitude of R resultant in this case is |R| = 4 – 3 [N] = 1 [N] How do you find the maximum and minimum resultant force? Here a= 12N, b=5N and let x be the angle between the […]

How do you reduce a 12v to 5V with a resistor? To divide voltage in half, all you must do is place any 2 resistors of equal value in series and then place a jumper wire in between the resistors. At this point where the jumper wire is placed, the voltage will be one-half the […]

What are the six most common NDT methods? The six most frequently used NDT methods are eddy-current, magnetic-particle, liquid penetrant, radiographic, ultrasonic, and visual testing. Is NDT dangerous? Certain nondestructive testing methods used by the military, such as ultrasonic or eddy current testing, are almost entirely benign and do not pose a hazard to testing […]

What is a group of humans called? Community,gathering,crowd,mob,guerillas’ or terrorists! There are all sorts of words for groups of humans: nation, corporation, family, club, mob, gang, etc etc. What is a group of snakes called? A group of snakes is generally a pit, nest, or den, but they’re generally thought of as solitary creatures, so […]

What is valve angle? Valve angle defined as the angle between a valve axis and a cylinder axis is one of the most important design factors that may have an influence on valve train design, cylinder head size, in-cylinder flow, etc. What is Valve face angle? The face of the valve is usually ground to […]

What do we call rising hot liquids? The particles in these fluids can move from place to place. Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. The liquid or gas in hot areas is less dense than […]