What is meant by e-fuel? E-fuel is a synthetic version of fossil fuel. Brilliant chemists have broken down the chains of elements that make up coal and gas, chiefly hydrogen and carbon. Using organic carbon-heavy matter and burning it to make power isn’t sustainable because eventually, al...
What is meant by 'Calorific value of a fuel is 8000 kJ kg^(-1) ? 01:56 Explain how air pollution can be minimised. 03:05 Name the process that converts solar energy into chemical energy natur... 01:56 Name the major types of coal and the percentage of carbon in them. 02:05 Men...
题目 3 (a) Different gases diffuse at different speeds.(i) What is meant by the term diffusion?[1(ii) What property of a gas molecule affects the speed at which it diffuses?[1(b)Helium is a gas used to fill balloons. It is present in the air in very small quantities. Diffusion c...
such as alcohol, fuel and tobacco. An excise tax is anindirect taxthat is not paid by the customers directly — instead, the excise tax is imposed on the supplier or the producer, who then includes it in the product price.
An opposition official says he wants to try to impeach the president, but whether that will happen or if the status quo resumes is unclear.一名反对派官员表示， 他想尝试弹劾总统，但这是否会发生或者是否恢复现状尚不清楚。Upward and out.向上、向外。Which of these terms was coined in the 1960s...
Explain what is a fossil fuel and its formation? What is meant by band gap energy? What is meant by thermoplastic polymer? Define latency Explain the meaning of Allotropes. Describe how methane gas can be generated, and explain why it is considered to be a greenhouse gas. a) What is mea...
Momentum is regarded as Mass in motion. In other words, when an object moves, it inherits momentum. The momentum is given as the product of the mass and the velocity. The change in momentum is given as the impulse. The momentum of a system remains conserved if there is no external ...
Hybrid electric vehicles (HEVs)have an internal-combustion engine and an electric motor that assists only at low speeds. The battery is charged either by the combustion engine or through recuperation when braking. Fuel cell electric vehicles (FCEVs)use electric motors. The electricity isgenerated ...
Winston's tale is something of a microcosm of our age of increasing rudeness,(4)___(fuel)by social media (and,often,politics).What can we do to fix this? Studies have shown that rudeness spreads quickly and virally,almost like the common cold.Just witnessing makes it far more likely ...
planned it behind the scenes. Their goal is not to resolve problems,on the contrary, they intend to perpetuate them and evenmakethem spread. As the crisisiscontinuallyworsening, they have donated weapons and ammunition to one side of the conflict. This is a typicalwayof pouring fuel on the...