Can I please get some help with this probem?
2 answers:
Answer:
In Step 4, the inequality sign should be flipped.
Step-by-step explanation:
Whenever you multiply or divide both sides of an inequality by a negative number, you need to flip the inequality sign. So, in Step 4, when you divide both sides by -10, the sign should be flipped.
The final answer should be:
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We already know that the box has an area of 100 sq. inches. All we have to do now is subtract the area of the 4 circles from the area of the box.
The formula for a circle's area is . We already know the radius, so one circle has an area of 12.56 units (4π in terms of pi). There are 4 circles, making your final equation
.
Answer:
The required specific heat is 196.94 joule per kg per °C
Step-by-step explanation:
Given as :
The heat generated = Q = 85.87 J
Mass of substance (m)= 34.8 gram = 0.0348 kg
Change in temperature = T2 - T1 = 34.29°C - 21.76°C = 12.53°C
Let the specific heat = S
Now we know that
Heat = Mass × specific heat × change in temperature
Or, Q = msΔt
Or, 85.87 = (0.0348 kg ) × S × 12.53°C
Or , 85.87 = 0.4360 × S
Or, S =
∴ S = 196.94 joule per kg per °C
Hence the required specific heat is 196.94 joule per kg per °C Answer
The side lengths of the mirrors are 1.5 ft and 2.5 ft respectively.
<u><em>Explanation</em></u>
Given that, the area of smaller mirror is 2.25 ft² and the area of larger mirror is 6.25 ft²
<u>Formula for the area of a square</u> : , where
is the side of the square.
Lets assume, the side length of smaller mirror is ft and the side length of larger mirror is
ft.
So....
and
Thus, the side length of smaller mirror is 1.5 ft and side length of larger mirror is 2.5 ft.