Answer:
Push because the force you use up is greater then down
Answer:
pressure = force/area
force = 200N
area = πr², π =3.142, r = 12 cm = 0.12 m
pressure = 200/3.142×(0.12)²
p = 200/3.142×0.24
p = 200/0.754
p = 265.25 Nm-¹ or 265.25 Pa
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Answer:
1. d 2.b 3.c 4.d 5. a 6. d
Explanation:
Answer:
The minimum temperature of the hot reservoir = 231.25 °C
Explanation:
η₁ = (1- T(c)/T(h)) × 100 ............. equation 1
Where η₁ = efficiency of the heat engine in percentage, T(c) = Temperature at which the low temperature reservoir operates, T(h)) =Temperature at which the high temperature reservoir operates.
Making T(h) the subject of the equation in equation 1
T(h) = T(c)/ {1-(η₁ /100)}
where η₁ = 41.2%, T(c) = 23.5 °C = 23.5 + 273 =296.5 K
∴T(h) = 296.5/{1-(41.2/100)}
T(h) = 296.5/(1- 0.412)
T(h) = 296.5/0.588
T(h) =504.25 K
Convert to temperature in Celsius
T(h) = 504.25 - 273 =231.25 °C
The minimum temperature of the hot reservoir = 231.25 °C
