When the lemon is cut, it releases gaseous molecules into the surrounding air which are responsible for the lemon's smell. These molecules move slowly at room temperature and the distance that they must cover, in relevance to their size, is immense. These reasons contribute to the fact that the smell takes a while to reach the other side of the room.
Answer:
The heat change of the system is 30 J.
Explanation:
Given;
increase in internal energy of a system, ΔU = 80 J
work done on the system, W = 50 J
The heat change of the system can be calculated from first law of Thermodynamics;
ΔU = Q - W
where;
Q is the heat absorbed by the system
W is the work done by the system (negative when work is done by the system and positive when work is done on the system)
Since work was done on the system the increase internal energy is given as;
ΔU = Q + W
ΔU - W = Q
80 J - 50 J = Q
30 J = Q
Therefore, the heat change of the system is 30 J.
Answer:
0.1531
Explanation:
a=1.5m/s^2
if you look at the image above let's assume that the object is on an inclined plane.
but because this object is on the ground, the angle is 0
a=g(sin0-ucos0)
a= -ug
-1.5= -u× 9.8
coefficient of friction= 1.5/9.8=0.1531
We might be able to determine whether or not the planet is suitable for humans to live on
