Answer:
It makes working together easier.
Explanation:
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:
Hong Kong remains in chaos, with no sign that pro-democracy protesters will yield on their demands. Mass incarceration and indoctrination of Uyghurs and other Chinese Muslims has become so widely known that Chinese leaders no longer try to deny that a roundup has taken place, although they dispute the numbers and offer justifications. As China extends its economic reach, its leaders have to confront another reality: Reputation matters, and economic clout will not easily convert to political or cultural influence. China now, of course, also has to cope with the fallout from international reaction to its handling
Explanation:
A: This was actually part of my drivers test. If you think about the role police officers and fire fighters play during emergencies sometimes they have to redirect the flow of traffic or control crowds. Sometimes an officer may be directing traffic. It's important to listen and do as told in situations like crowds.
