By using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
<h3>Efficiency of a machine</h3>
- Efficiency is the percent of work put into a machine (input work) to that of the work done by the machine (output work).
- Efficiency of a machine is always less than 100% because the output work is always less than the input work because some of the input work is used to overcome friction.
Efficiency = work output/work input * 100%
Efficiency of fireplaces = 15%
Amount of food required to heat a room to 20°C = 15 kg
Assuming efficiency of 100%, amount of wood required will be X kg:
X = 15% * 15 kg
X = 2.25 Kg
By switching to woodstoves which are 75% efficient, amount of wood required will be Y kg:
Y = 2.25 kg / 75%
Y = 3 kg
Therefore, by using a woodstove, the kilograms of wood required to
heat a room to 20°C is 3 kg
Learn more about efficiency of machines at: brainly.com/question/3617034
Answer:
Explanation:
The question asks about the NEW global economy so the answer is not nations or states. NGOs have little decision-making power and supranational organizations do not exist; except for the United Nations.
So the correct answer is MOST financial decisions are made <u>at the corporate level in global cities.</u>
Because the payment is monthly and They're the kids the adult decided not to take care of. Just my opinion
Answer: Woodrow Wilson's record on race relations was not very good. African Americans welcomed his election in 1912, but they were worried too. During his first term in office, the House passed a law making racial intermarriage a felony in the District of Columbia. His new Postmaster General also ordered that his Washington offices be segregated, with the Treasury and Navy soon doing the same. Suddenly, photographs were required of all applicants for federal jobs. When pressed by black leaders, Wilson replied, "The purpose of these measures was to reduce the friction. It is as far as possible from being a movement against the Negroes. I sincerely believe it to be in their interest."
Answer:
False
Explanation:
Good papers need creative elements and well written content or they would be all strange and poorly executed.