Answer:
C.
Explanation:
Exothermic refers to a RELEASE of energy through a reaction(usually chemical). When salt dissociates, polar water molecules pull apart ions, releasing energy.
Answer:
1. Solid to liquid:ice cube melting into water.
2. Liquid to gas:water boiling
3. Solid to gas:dry Ice transfer into carbon dioxide directly.
Explanation:
The term phase transition (or phase change) is most commonly used to describe transitions between solid, liquid, and gaseous states of matter, as well as plasma in rare cases.
Answer:
Given,
load=300N
Load Distance=40 cm
Effort Distance = 60 cm
Formula used,
Load × load distance = Effort × effort distance
Effort = load × load distance/ effort distance
M.A=load/effort
V.R=effort distance/load distance
Answer:
Wc = 7.84 weight of crown
Ww = 7.84 - 6.86 = .98 weight of water displaced
Density = 7.84 / .98 = 8 crown is 8 X that of water
Since gold has a density of 19.3 that of water the crown is certainly not 100 percent (if any) gold
False, Most Americans live in large cities