Answer:A
Explanation:
Those who want to save money and will use the product for only a few years
Answer:
(a)
<em>d</em>Q = m<em>d</em>q
<em>d</em>q = <em>d</em>T
= (T₂ - T₁)
From the above equations, the underlying assumption is that remains constant with change in temperature.
(b)
Given;
V = 2L
T₁ = 300 K
Q₁ = 16.73 KJ , Q₂ = 6.14 KJ
ΔT = 3.10 K , ΔT₂ = 3.10 K for calorimeter
Let be heat constant of calorimeter
Q₂ = ΔT
Heat absorbed by n-C₆H₁₄ = Q₁ - Q₂
Q₁ - Q₂ = m ΔT
number of moles of n-C₆H₁₄, n = m/M
ρ = 650 kg/m³ at 300 K
M = 86.178 g/mol
m = ρv = 650 (2x10⁻³) = 1.3 kg
n = m/M => 1.3 / 0.086178 = 15.085 moles
Q₁ - Q₂ = m ' ΔT
= (16.73 - 6.14) / (15.085 x 3.10)
= 0.22646 KJ mol⁻¹ k⁻¹
This statement is b which is true: hope this helped
Answer:
Electromechanical systems or devices are systems or devices that involves the interaction between electrical systems and mechanical systems in which the motion of mechanical parts is converted to electrical energy or made to interact with energy or in which electrical energy is converted to mechanical energy or interacts with a moving mechanical system
Therefore;
Electromechanical systems convert <u>electrical energy</u> input into a <u>mechanical energy</u> output
Explanation:
Answer:
a. W = 51,194.54 kJ
b. W = 102,390 kJ
c. W = 153,585 kJ
Explanation:
a. the ground at 15°C.
=20°C = 273 K + 20 = 293 K
=15°C = 273 K + 15 = 288 K
W = 51,194.54 kJ
b. a pond at 10°C.
=10°C = 273 K + 10 = 283 K
W = 102,390 kJ
c. the outside air at 5°C.
=5°C = 273 K + 5 = 278 K
W = 153,585 kJ
Hope this helps!