Category: Physics

What 3 places on earth do convection currents occur? Convection currents occur within: the atmosphere – wind. the hydrosphere – ocean currents. How convection takes place in the mantle? The mantle is heated from below (the core), and in areas that are hotter it rises upwards (it is buoyant), whereas in areas that are cooler […]

What does it mean when a ambulance lights are on but no siren? Generally, when the lights are on but the siren is not activated, the crew is just tired of hearing the noise and only using the siren at intersections. The problem with that is that it’s not legal. Why does an ambulance not […]

At which stage is potential energy at its minimum? The potential energy due to gravity is at a minimum, since the mass is lifted the least amount above ground. In fact, if ground level is imagined at the bottom of the motion, the potential energy due to gravity is zero at this point of the […]

Can you please look into it? Sometimes, when we lack the time, we ask someone else to look into a problematic situation for us. Both of the given sentences — “Can you please look into it?” and “Please look into it” — are ways of asking for someone’s help with the investigation. Both use the […]

What social and emotional changes are associated with puberty? During puberty your child’s emotions may become stronger and more intense. Their mood might change more frequently, quickly and randomly. Your child may have strong emotions that they’ve never experienced before. It’s common for them to feel confused, scared or angry and not know why. Why […]

Which rule of Fleming can be used to determine the direction of induced 1 current in the secondary coil if current in the primary coil is changed? Fleming’s Right hand rule – If the forefinger, second (central) finger and thumb of the right hand are stretched at right angles to each other, with the forefinger […]

What is the force in Newtons on each load? The unit of force is the Newton (N) – where one newton is one kilogram metre per second squared. The Newton is defined as the force which, when applied to a mass of one kilogram, gives an acceleration of one meter per second squared. F = […]

Why the number of protons and number of electrons are equal? Actually the proton and electron count of an atom are equal only when the atom is neutral in charge. The electrons are found in orbitals surrounding the nucleus. In order for the atom to remain electrically neutral the protons and electrons must balance each […]

What is the biggest structure in the universe? List of the largest cosmic structures Structure name (year discovered) Maximum dimension (in light-years) Notes Virgo Supercluster 110,000,000 Part of the Laniakea Supercluster (see above). It also contains the Milky Way Galaxy, which contains the Solar System where the Earth orbits the Sun. Reported for reference Can […]

How can we make this object move? Force can make things move, change shape or change their speed. Some forces are direct and happen when two things touch (like a foot kicking a ball) or over a distance (such as a magnet or gravity). Friction is the force between two objects in contact with each […]