Category: Physics

Why is momentum not always conserved? The total momentum of both objects does not change. For this reason we say that the total momentum of the interacting objects is conserved. Newton’s third law implies that the total momentum of a system of interacting objects not acted on by outside forces is conserved. Is angular momentum […]

What does hypothesis mean in simple terms? A hypothesis is a suggested solution for an unexplained occurrence that does not fit into current accepted scientific theory. The basic idea of a hypothesis is that there is no pre-determined outcome. What is the best definition for the word prediction? A prediction is what someone thinks will […]

What are 2 units used for measuring volume? The base unit of volume in the SI system is the cubic meter. There are 1000 liters per cubic meter, or 1 liter contains the same volume as a cube with sides of length 10cm. A cube with sides of length of 1 cm or 1 cm3 […]

What are the positive effects of a volcano? Volcanoes can provide people with many benefits such as: volcanic rock and ash provide fertile land which results in a higher crop yield for farmers. tourists are attracted to the volcano, which increases money to the local economy. geothermal energy can be harnessed, which provides free electricity […]

How do you know if a spring is ideal? A ideal spring has an equilibrium length. If a spring is compressed, then a force with magnitude proportional to the decrease in length from the equilibrium length is pushing each end away from the other. How much force is needed to pull a spring with a […]

What makes a boiling egg float? Eggs have an air cell that becomes larger as the egg ages and acts as a buoyancy aid. An egg can float in water when its air cell has enlarged sufficiently to keep it buoyant. A spoiled egg will have an unpleasant odor when you break open the shell, […]

How wages are determined? Just as in any market, the price of labor, the wage rate, is determined by the intersection of supply and demand. When the supply of labor increases the equilibrium price falls, and when the demand for labor increases the equilibrium price rises. What are the factors affecting wages and salary? The […]

Can alcohol be used in a thermometer? The two common liquids used in liquid in glass thermometers are alcohol (ethanol) and mercury. alcohol is not used in thermometer. Are alcohol based thermometers accurate? Alcohol thermometers are also inexpensive and durable. They are typically not as accurate as mercury thermometers because of the alcohol’s susceptibility to […]

What are the two types of athletics? There are two types of athletics events: track and field. Track events are running and walking races. Field events are jumping and throwing contests. Objects thrown by athletes include a hard disk, called a discus, and a light spear, called a javelin. What is the another name of […]

How do you convert C to F fast? If you find yourself needing to quickly convert Celsius to Fahrenheit, here is a simple trick you can use: multiply the temperature in degrees Celsius by 2, and then add 30 to get the (estimated) temperature in degrees Fahrenheit. How do you calculate C to F? To […]