The answer is a. plenty of water
Among the choices, the unit of energy is calories. Answer in 1) is D. In 2) we are given with te mass , heat and temperature change. we just need to get the heat capacity and compare it with the following metals. The calculated heat capacity is 0.46 kJ/kg K. The answer is A. iron. In 3) we can compute the heat absorbed by the formula ΔH=mCpΔT. Cp of water is 4.18 J/g K. Answer of 3) is D. In 4) the formula used in Cp=ΔH/mΔT. Answer in 4) is A. The heat of enthalpy of fusion of ice is 80 cal/g. We convert this to J/g. Answer in 5) is B.334 J/g.
sunlimation is when a solid goes to a gas thats all i can awnser i havent got that far in chemistry yet.
- increasing the concentration of N₂
- increasing the concentration of O₂
- decreasing the concentration of NO
- increasing the temperature
:)
Solution :
Let, intensity at distance 3 m from the acoustic source is 
.
We need to find the distance d where the intensity is 
.
Now, we know intensity is inversely proportional to square of distance between the source.
Therefore, intensity will be halved at a distance of 
.
