Category: Physics

Is momentum ever not conserved? Momentum is an important quantity because it is conserved. Yet it was not conserved in the examples in Impulse and Linear Momentum and Force, where large changes in momentum were produced by forces acting on the system of interest. The only unbalanced force on each car is the force of […]

What is the specific weight of water? The specific weight, also known as the unit weight, is the weight per unit volume of a material. A commonly used value is the specific weight of water on Earth at 4°C, which is 9.807 kN/m3 or 62.43 lbf/ft3. How do you find the specific weight of air? […]

How can we maintain good health and well-being? Maintaining mental health and wellbeing spend time with friends, loved ones and people you trust. talk about or express your feelings regularly. reduce alcohol consumption. avoid illicit drug use. keep active and eat well. develop new skills and challenge your capabilities. relax and enjoy your hobbies. set […]

What are the 3 constant acceleration equations? Constant Acceleration Equations s = (u + v)t. s = ut + at. s = vt − at. Is 0 a constant acceleration? NO. Because zero acceleration means no change of acceleration. That is no increase or decrease of acceleration throughout the path. As for zero acceleration, the […]

Is 60w brighter than 40W? So if a package for a lightbulb says the bulb uses 60 watts, or 60W, it means that that bulb will use 60 watts of electrical power. A standard 40W bulb is equal to 400+ lumens, which represents the brightness of a bulb. Typically, the higher the wattage, the higher […]

What is the key variable for calculating potential energy? The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of […]

What is worse systematic or random error? These errors come in two forms; one is much worse than the other: Random error (can be corrected for – see below) Systematic error (extremely serious if you don’t know it exists) Which of the following is not systematic error? Instrumental error. What is random error vs systematic […]

Which organ is the least important in the digestive system? Gallbladder. The gallbladder sits under the liver on the upper-right side of the abdomen, just under the ribs. It stores something called bile. Bile is constantly produced by the liver to help break down fats, but when not needed in digestion, it is stored in […]

Is Delta H and Delta Q the same? This is the same for enthalpy change. delta q is the total energy change under any conditions, while enthalpy is the energy change specifically under constant pressure conditions. How do you calculate Delta Q? Q=mcΔT Q = mc Δ T , where Q is the symbol for […]

How will the new soles help solve the problem? ANSWER: The new soles help solve “the problem by adding surface roughness to increase friction”. How do I stop my shoes from wearing down on one side? Pedag Correct Heel Pads Heel cushion with contoured padding to correct gait. Ideal for bow legs, knock knees supination […]