Category: Physics

When and where are hydraulics used? They use hydraulics to increase water pressure for better cleaning. Dishwashers fitted with hydraulics are also generally quieter. Construction machines. Equipment such as cranes, forklifts, jacks, pumps and fall arrest safety harnesses use hydraulics to lift and lower objects. Are car hydraulics legal? A car with hydraulics over the […]

Is electromagnetic force affected by intervening medium? EM force does not need any intervening medium. Why is gravitational force independent of medium? Gravity is unipolar, attractive. So when it goes through a medium, there is no polarizing effect or polarizing forces. Thus the gravitational constant is independent of the intervening medium. Does electrostatic force depend […]

What is the ability to change matter? Energy is defined in science as the ability to move matter or change matter in some other way. Energy can also be defined as the ability to do work, which means using force to move an object over a distance. How does energy cause changes? HOW DOES ENERGY […]

How do you calculate energy change? To calculate an energy change for a reaction: add together the bond energies for all the bonds in the reactants – this is the ‘energy in’ add together the bond energies for all the bonds in the products – this is the ‘energy out’ energy change = energy in […]

How do we calculate tension? Tension Formulas – How to Calculate Tension Force Tension can be easily explained in the case of bodies hung from chain, cable, string etc. T = W ± ma. Case (iv) If the body moves up or down with uniform speed, tension; T = W. T=m(g±a) As tension is a […]

What happens if gas pressure is too high? High gas pressure can be just as bad for your furnace. That’s because it greatly increases the risk of furnace overheating. When this happens, all manner of internal components may become damaged by the excessive heat. What are four factors that determine the efficiency of a furnace? […]

What is the difference between a force multiplier and a distance multiplier? Levers can be force multipliers, when they increase the force that is put in (the effort). They can be distance multipliers if they make the load move further than the effort. The amount the force or distance is multiplied depends on the distances […]

What is my ideal weight for my height? Body mass index (BMI) is one of the most popular ways to calculate an ideal weight range. Getting your current BMI is as easy as plugging your height and weight into a calculator. A result between 18.5 and 24.9 means you’re in the “normal” weight range for […]

How do astronomers detect dark matter? Galaxy clusters are particularly important for dark matter studies since their masses can be estimated in three independent ways: From the scatter in radial velocities of the galaxies within clusters. From X-rays emitted by hot gas in the clusters. Is dark matter invisible? Scientists have not yet observed dark […]

Do volcanoes cause lightning? Volcanic lightning arises from colliding, fragmenting particles of volcanic ash (and sometimes ice), which generate static electricity within the volcanic plume, leading to the name dirty thunderstorm. Moist convection and ice formation also drive the eruption plume dynamics and can trigger volcanic lightning. What does volcanic earthquake mean? A volcano tectonic […]