The surrounding air will become warm when water vapor condenses. The vapors when become water will give away latent heat they have, we know that latent heat is required for the object to change states, so, the latent heat the water vapor had when it became water vapor from water will be given out when it again becomes water.
I would say unlimited polarity because the compass’s needle is always attracted to Earth’s north pole.
Good luck to you!
I believe the answer is H for when you bounce it, it has stress when it hits the floor and then goes up giving it kinetic
Answer:
83 mph
Explanation:
We are told that the collision is perfect elastic, this means that no energy whatsoever was lost in the process.
We can apply the principle of conservation of momentum. It states that the total final momentum is equal to the total initial momentum in a system.
Hence, if the mass of the wall is assumed to be M and the mass of the ball is assumed to be m, we have that:
(M * V) + (m * v) = (M * U) + (m * u)
Where V = final velocity of Wall = 0 mph
v = final velocity of ball
U = initial velocity of wall = 0 mph
u = initial velocity of ball = 83 mph
Hence:
(M * 0) + (m * v) = (M * 0) + (m * 83)
=> mv = m * 83
=> v = 83 mph
The ball would have a final velocity of 83 mph.
Answer:
See below explanation
Explanation:
The correspondent chemical reaction for copper carbonate decomposed by heat is:
CuCO₃ (s) → CuO (s) + CO₂ (g)
Considering all molar mass (MM) for each element ( we consider rounded numbers) :
MM CuCO₃ = 123 g/mol
MM CuO = 79 g/mol
MM CO₂ = 44 g/mol
Statement mentions that scientis heated 123.6 g of CuCO₃ (almost a MM), until a black residue is obtained, which weights 79.6 g : this solid residue is formed by CuO, and the remaining mass (approximatelly 44 g) belongs to teh second product, this is, CO₂; as it is a gas compund, it is not certainly included on the solid residue.
So, law of conservation mass is true for this case, since: 123.6 g = 79.6 g + 44 g. As explained, on the solid residue, we don not include the 44 g, which "escaped" from our system, since it is a gas compound (CO₂)
