The final temperature of copper is 155.43°C.
Step-by-step explanation:
The formula to apply is Q=m*Δt*c where ;
Q=heat energy, m=mass, c=specific heat capacity and Δt= change in temperature
Given that Q=54 calories , m=4.50 g and c=0.092 cal/g°C
In this question find Δt then ,the final temperature.
Δt=Q/m*c
Δt=54/4.50*0.092 =130.43°C
To find final temperature, apply the formula;
Δt=Final temperature - Initial temperature
130.43°C=Final temperature-25°C
130.43°C+25°C=Final temperature
155.43°C
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Specific Heat Capacity : brainly.com/question/12431744
Keyword : specific heat capacity
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Answer:
12.75w + 25 = 114.25
w = 7
Step-by-step explanation:
since sarah is receiving 12.75 each week for a number of weeks, w (we don't know its value yet) we know that first part of the equation: that 12.75 is the coefficient next to w. Then we have the extra 25, so we know that adding 12.75w and 25 would give us sarah's total amount, which is 114.25.
to find out what w represents, we have to solve for it. solving for w means isolating it on one side. so, what we can do first is subtract 25 from both sides. that would then make the equation:
12.75w = 89.25
now, we have only one step left to isolating w, and that's to get 12.75 on the other side somehow. since we're multiplying 12.75 with w, and we're applying additive inverse properties, meaning the opposite of what is happening to cancel it out on the side it's in, we would divide 12.75 on both sides. in the left, 12.75 would cancel out, and in the right, we would divide 89.25 by 12.75. the quotient is 7.
now there's nothing left to take out to isolate w, so we have:
w = 7
sarah saved up for 7 weeks.
It is the bottom right one because the amount he walked has to be greater than 200
Hello,
Here is the formula to find the area of the trapezoid:
A=1/2(b1+b2)×h
Where b1 represent big base
b2 represent small base
and h represent height
Now, we just need to replace the number to get the final answer:
A=1/2(16.8+6.9)×2
A=1/2(23.7)×2
A=23.7 square yards. As a result, the area of the trapezoid is 23.7 square yards. Hope it help!
I think A, but im not 100% sure
