<span>The nature of potential energy is that the zero point is arbitrary; it can be set like the origin of a coordinate system. That is not to say that it is insignificant; once the zero of potential energy is set, then every value of potential energy is measured with respect to that zero. Another way of saying it is that it is the change in potential energy which has physical significance.
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Answer: A. The flask would probably feel cooler than before the reaction started.
Explanation: An endothermic reaction is a type of of chemical reaction in which energy is absorbed from the surroundings. The temperature of the surrounding decreases.
An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.
When an endothermic reaction takes place in the flask, the heat is absorbed by the flask and thus the temperature of the surrounding (here the flask) will decrease which can be felt by touching the outside of the test tube. Thus the flask would appear colder.
Answer:
its point Y because the dot that represents Y is cose to s and can make a chan reaction
Answer:
The average force exerted on the car is 590.12 N.
Explanation:
Given that,
The power generated, P = 22 hp = 16405.4 W
Speed of the car, v = 100 km/h = 27.8 m/s
We need to find the average force exerted on the car due to friction and air resistance.
We know that,
Power, P = F v
Where
F is force exerted on the car
So, the average force exerted on the car is 590.12 N.
Answer:
7.3km/hr
Explanation:
v=d/t=4.5km/0.62hrs=7.3km/hr