Category: Physics

What is the function of momentum? Momentum is a vector quantity: it has both magnitude and direction. Since momentum has a direction, it can be used to predict the resulting direction and speed of motion of objects after they collide. Below, the basic properties of momentum are described in one dimension. Why do we use […]

How many gallons of milk does it take to make cheese? Did you know it takes around 10 POUNDS of milk to make just 1 pound of cheese?! To put this into perspective, a gallon of milk weighs 8.6 pounds, which means more than 1 gallon of milk is needed per pound of cheese. That’s […]

What emotions make your heart beat faster? Stress and your heart These hormones include cortisol and adrenaline. They prepare your body to deal with stress. They cause your heart to beat more rapidly and your blood vessels to narrow to help push blood to the center of the body. The hormones also increase your blood […]

Which object is least likely to allow to pass through it? Translucent is a material which allows light partially to pass through it. For example, butter paper. In the given options, a pair of eyeglasses, a clear water bottle, a car windshield are transparent materials. But a tree trunk is an opaque as it does […]

What is the formula for efficiency at full load? Then the efficiency of transformer can be written as : Where, x2Pcufl = copper loss(Pcu) at any loading x% of full load. What is a soil index? The Soil Conditioning Index (SCI) is a tool that can predict the consequences of cropping systems and tillage practices […]

How do light waves travel through space? In contrast, light waves can travel through a vacuum, and do not require a medium. In empty space, the wave does not dissipate (grow smaller) no matter how far it travels, because the wave is not interacting with anything else. As a wave travels from a source, it […]

Is Lead heavier than steel? How much does lead weigh, when compared with steel? The specific gravity of lead is 11.34, the specific gravity of steel is 7.8 Or in other words steel is 7.8 times as heavy as water and lead is 11.34 times as heavy as water. One cubic inch of steel weighs […]

How do you find the weight of displaced water? The weight of the displaced fluid can be found mathematically. The mass of the displaced fluid can be expressed in terms of the density and its volume, m = ρV. The fluid displaced has a weight W = mg, where g is acceleration due to gravity. […]

What is the characteristic of best model? This chapter introduces seven key properties, whether they already be widely accepted or have yet to be accepted at all, that a good economic model should possess: 1) parsimony, 2) tractability, 3) conceptual insightfulness, 4) generalizability, 5) falsifiability, 6) empirical consistency, and 7) predictive precision. What are the […]

What is the average classroom door size? The measurements of an average door are 80 inches by 36 inches. In this measurement, the length is 80 inches and the width is 36 inches. If Hank estimates the width of the door of his classroom, he will then most likely estimate it at 36 inches. What […]