almost half of the
acid precipitation that falls in southeastern Canada results from
pollution produced in Ohio, Indiana, Pennsylvania, Illinois,
Missouri, West Virginia, and Tennessee
Answer:
Explanation:
When 2 gms of steam condenses to water at 100 degree latent heat of vaporization is releases which is calculated as follows
Heat released = mass x latent heat of vaporization
= 2 x 2260 = 4520 J
When 2 gms of water at 100 degree is cooled to ice water at zero degree heat is releases which is calculated as follows
Heat released = mass x specific heat x( 100-0)
= 2 x 4.2 x 100 = 840 J
When 2 gms of water at zero degree condenses to ice at zero degree latent heat of fusion is releases which is calculated as follows
Heat released = mass x latent heat of fusion
= 2 x 334 = 668 J
When 2 grams of steam at 100 degrees Celsius turns to ice at 0 degrees Celsius heat released will be sum of all the heat released as mentioned above ie
4520 + 840 +668 = 6028 J
Answer:
0.22
Explanation:
Given that
Radius of turntable, R = 19 cm = 0.19 m
Speed of rotation the turntable, f = 32 rpm = 32/60 = 0.533 rev/sec
from free body diagram and forces resolution, we have
μ(s) * m * g = m * v²/R
μ(s) * g = v²/R
μ(s) = v² / gR, recall, v = wr, so
μ(s) = w²R² / gR
μ(s) = w²R / g, recall again, w = 2πf
μ(s) = (2πf)²R / g, on substituting,
μ(s) = (2 * 3.142 * 0.533)² * 0.19 / 9.8
μ(s) = 3.35² * 0.19 / 9.8
μ(s) = 2.13 / 9.8
μ(s) = 0.22
X=ut+0.5at²
1000 = 63.3u + 0.5 * 0.0323 * 63.3²
u = (1000 - 0.1615*63.3²)/63.3
u = 5.57 m/s
i don't even know if this is correct
Answer:
Explanation:
T₁ = 700 + 273 = 973 k
T₂ = 330 + 273 = 603 k
Theoretical efficiency = T₁ - T₂ / T₁
= (973 - 603) / 973
= .38 OR 38%
Operating efficiency = .79 x 38
= 30.02 %
Heat input Q₁ , Heat output to sink Q₂ , conversion into power = Q₁ - Q₂
given Q₁ - Q₂ = 1.3 x 10⁹ W
efficiency = Q₁ - Q₂ / Q₁
Q₁ - Q₂ / Q₁ = 30.02 / 100
100Q₁ - 100Q₂ = 30.02Q₁
69.98 Q₁ = 100Q₂
Q₁ = 1.429 Q₂
Putting this in the relation
Q₁ - Q₂ = 1.3 x 10⁹ W
1.429Q₂ - Q₂ = 1.3 x 10⁹ W
.429Q₂ = 1.3 x 10⁹
Q₂ = 3.03 x 10⁹W
= 3.03 GW.
