Answer:
The electric force is conservative.
Since
ΔK = −ΔU,
Kf − Ki =Ui −Uf.
We have,
Kf = 0
Ui = 0.
Thus Ki =Uf.
<u>so ,at 10 fm Uf = (2×10)−12 J.</u>
Well I can’t see the rocks but, to determine the relative age of different rocks, geologists start with the assumption that unless something has happened, in a sequence of sedimentary rock layers, the newer rock layers will be on top of older ones.
Hope this helped! <3
Answer:
the mass number, trust me
Answer:
THE SPECIFIC HEAT OF THE METAL IS 28.69 J/g C
Explanation:
Mass of unknown metal = 30 g
Mass of water = 100 g
Initial Temperature of metal = 110 C
Initial temperature of water = 200 C
Final temperature of the system = 25 C
Specific heat of water = 4200 J/ g C
Specific heat of metal = unknown
Heat lost = Heat gained\
M C Q = M C Q
30 * C * ( 25 - 110) = 100 * 4200 * (25 -200)
C = 100 * 4.18 * -175 / 30 * - 85
(the minus sign cancels out and we have):
C = 100 * 4.18 * 175 / 30 * 85
C = 73150 / 2550
C = 28.69 J/ g C
The specific heat of the unknown metal is hence 28.69 J/ g C
