Category: Physics

Can a laser pointer cause fire? Whereas, for a laser pointer all of the light from it can reach your eye in one go if you were to stare into a laser beam. This can be dangerous because all of the energy from the laser beam is depositing on your eye in one go. But […]

Why COP of heat pump is more than refrigerator? (See thermal efficiency of a heat engine.) Note that the COP of a heat pump depends on its direction. The heat rejected to the hot sink is greater than the heat absorbed from the cold source, so the heating COP is greater by one than the […]

What are 6 different tests that are used to identify minerals? Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. What are the two main types of mineral classification? Minerals are classified based on their crystal form and chemistry. Minerals are divided into […]

Will Dust Bowl happen again? More than eight decades later, the summer of 1936 remains the hottest summer on record in the U.S. However, new research finds that the heat waves that powered the Dust Bowl are now 2.5 times more likely to happen again in our modern climate due to another type of manmade […]

Is burning 300 calories a day good? The participants who exercised for 30 minutes a day, burning 300 calories, lost an average of 7 pounds. It doesn’t seem to make mathematical sense, but neither do your hunger habits. Researchers found that participants in the 600-calorie category were eating more in each meal and snack. How […]

Is beach replenishment cheap? Beach nourishment Relatively inexpensive option but requires constant maintenance to replace the beach material as it is washed away. Who pays for beach replenishment? Federally authorized shore protection projects are usually funded with up to 65% federal funds and 35% from the local cost share sponsor. 3 These projects come at […]

Does the amount of solvent change when you dilute a solution? 1. Learn how to dilute and concentrate solutions. Often, a worker will need to change the concentration of a solution by changing the amount of solvent. Dilution is the addition of solvent, which decreases the concentration of the solute in the solution. What is […]

What happens when mercuric oxide and potassium nitrate are heated? When mercuric oxide is heated, it decomposes to give mercury and oxygen. Potassium nitrate on heating gets converted into molten potassium nitrite with the release of oxygen. What Happens When mercuric oxide is subjected to heating? Mercury(II) oxide, a red solid, decomposes when heated to […]

Are all projectiles parabolic? Projectile motion is parabolic because the vertical position of the object is influenced only by a constant acceleration, (if constant drag etc. is also assumed) and also because horizontal velocity is generally constant. Why are parabolas important in real life? The parabola has many important applications, from the design of automobile […]

What word is used to refer to a group of organ systems working together? organism What word is used to refer to a group of organ systems working together organism cell tissue organ? The answer is most likely organism. What three organ systems must work together to bring oxygen to the body cells? For example, […]