Which is the perpetual source of energy? Perpetual energy may refer to: Perpetual motion, the property of an imaginary device that, once started, continues to move forever with no input of external energy. Renewable energy, energy collected from resources that are naturally replenished on a human timescale. Is gravity perpetual motion? It is true that […]
What are the impacts of fire hazards?
What are the impacts of fire hazards? The side effects of a fire also represent a hazard. Firstly the fire will deplete oxygen from the surrounding atmosphere. Most casualties from a fire die from the smoke and lack of oxygen. Secondly, especially where plastics are being burnt, the fumes could be toxic, and anyone exposed […]
What are examples of populations?
What are examples of populations? Population is the number of people or animals in a particular place. An example of population is over eight million people living in New York City. What are all the individuals of a species that live in an area called? A population comprises all the individuals of a given species […]
Why a Dyson sphere is impossible?
Why a Dyson sphere is impossible? Maddox points out that a Dyson sphere is physically impossible. To keep this shell in orbit around the Sun at any distance in the Habitable Zone would require some force counteracting gravity and pushing outwards on the sphere. In stars, this is radiation pressure. Is the Death Star a […]
Why commutator is needed?
Why commutator is needed? All generators produce a sine wave, or AC currents when the rotor turns in the magnetic field. The commutator on the DC generator converts the AC into pulsating DC. The commutator assures that the current from the generator always flows in one direction. What is a commutator in math? In mathematics, […]
What is the electron carrier for photosynthesis called?
What is the electron carrier for photosynthesis called? NADPH What substances are recycled between photosynthesis and cellular respiration? The four substances recycled during photosynthesis and respiration are: carbon dioxide (CO2), which is emitted as waste in cellular respiration and used by plants to make glucose, oxygen (O2), which is emitted as waste by plants and […]
Which force is most important in tug of war?
Which process is involved when the oceanic crust plunges down into the mantle?
Which process is involved when the oceanic crust plunges down into the mantle? subduction What happens to old oceanic crust as new molten material rises from the mantle? What happens to old oceanic crust as new molten material rises from the mantle? It is recycled back into the mantle through the process of subduction. The […]
What is cyclone in simple words?
What is cyclone in simple words? In meteorology, a cyclone refers to any low pressure area with winds spiralling inwards. Cyclones rotate clockwise in the Southern Hemisphere and anti-clockwise in the Northern Hemisphere. Cyclones are also referred to as hurricanes and typhoons. What are the types of cyclones? There are two types of cyclones: Tropical […]
What are the main parts of nuclear power station?
What are the main parts of nuclear power station? 2.2 Components of a nuclear power station The fuel. The elements that undergo the fission are generally uranium (U) or plutonium (Pu). The control rods. A nuclear fission reaction at criticality can be maintained by controlling the critical mass (as you heard about in Week 1). […]