Answer:
The answer is 96ft^3
Explanation:
T=initial concrete mixture
S1=initial amount of sand
S2=final amount of sand
T2=final amount concrete mixture
C=amount of cement
Data:
T=480Ft^3
the quantities of the initial mixture are
S=0.7*480=336Ft^3
C=0.3*480=144 Ft^3
we pose the following equations
144+S2=T2
T2*0.75=S2
if we solve
S2=144/(1/0.75-1)=432ft^3
to know how much we should add we subtract it from the initial amount of sand
Answer=432ft^3-336ft^3=96ft^3
B.)from conductor to insulator
C.)from high potential to low potential
D.)from series circuit to parallel circuit
Answer:
2.5
Explanation:
The mass of the piece of copper is equal to 121.2 g when its specific heat capacity is 0.385 J/g°C.
The specific heat capacity can be described as the amount of heat required to raise the temperature in one kilogram of a substance by one-degree Celcius.
The temperature of the material will change whenever the heat is absorbed or lost by it.
Q = mCΔT
Given, the amount of energy transferred, Q = 3500 J
The change in the temperature = 225 - 150 = 75 °C
The specific heat capacity of the copper, C = 0.385 J/g°C
The mass of the piece of copper for the given change in temperatures can be calculated as:
3500 J = m × (0.385 J/g°C) × 75°C
m = 121.2 g
Therefore, the mass of the piece of copper is equal to 121.2 g.
Learn more about specific heat capacity, here:
#SPJ6
Answer:
121 on edge 23
Explanation:
B) Fusion is an exothermic reaction while fission is an endothermic reaction.
C) Fusion does not generate energy while fission generates a huge amount of energy.
D) Fusion only takes place in the stars so it cannot be used on Earth to generate energy while fission can be used here for energy.