Car accelerates whenever its velocity is changed by either changing the speed or the direction of the car's motion. So, even if you are driving your car at a constant speed while turning around a corner, you are still accelerating.
While the Pope had granted Spain sovereignty over the New World, de Las Casas argued that the property rights and rights to their own labor still belonged to the native peoples. Natives were subjects of the Spanish crown, and to treat them as less than human violated the laws of God, nature, and Spain.
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:
I think the one of the best answers can be C
A selfish person
i think i am sorry if that is wrong
