Category: Physics

What are the factors affecting the resistance of a material? There are four factors affecting resistance which are Temperature, Length of wire, Area of the cross-section of the wire, and nature of the material. When there is current in a conductive material, the free electrons move through the material and occasionally collide with atoms. Does […]

Why did Germany struggle to pay reparations? Intense negotiation resulted in the Treaty of Versailles’ “war guilt clause,” which identified Germany as the sole responsible party for the war and forced it to pay reparations. Germany had suspended the gold standard and financed the war by borrowing. Why did the US not sign the Treaty […]

How do you keep running when you want to stop? 10 Kick-Ass Tricks to Keep Running (When You Want to Stop) Are you Really Tired? Is it your legs that are tired, a niggle beginning to appear or your mind that’s just had enough? Focus on your Breathing. Listen to Music. Eat Something. Count Down. […]

How do you calculate noise reduction distance? In a free field – a doubling of the distance from a noise source reduces the sound pressure level with 6 decibel. A “free field” is defined as a flat surface without obstructions….Example – Rifle Shot and Sound Pressure at Distance. Distance (feet) Sound Pressure Lp (decibel) 2.5 […]

Which of the following bonds is the strongest? covalent bond What is the basis of metallic bond? The basis of Metallic bond is the type of electrostatic attractive force between conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions. What is the strongest metallic bond? valance shell […]

What is the best example of mechanical energy? Mechanical energy is the ability to do work. A dart gun is still another example of how mechanical energy of an object can do work on another object. When a dart gun is loaded and the springs are compressed, it possesses mechanical energy. What household devices use […]

Which of the following is needed to warm up 1g of any substance by 1 0c? Specific heat means the heat to raise the temperature of 1 gram of the material by 1 degree C. So if you want to raise the temperature of that one gram from 19 to 35 degrees, that same gram […]

Is drag force equal to weight? The drag force depends on the square of the velocity. So as the body accelerates its velocity and the drag increase. It quickly reaches a point where the drag is exactly equal to the weight. When drag is equal to weight, there is no net external force on the […]

Does water reflect or absorb sound? As sound travels through a medium such as water, it gets absorbed – caught by the molecules within the medium. They do this by stealing some of the energy from the sound wave. The absorption in sea water is much greater than would be expected due to the viscosity […]

How long until trazodone kicks in for sleep? It can take 1 to 2 weeks before trazodone starts to work, but may be 4 to 6 weeks before you feel the full benefit. Trazodone can make you feel sleepy. If you take it once a day, it’s best to take it in the evening or […]