Answer:
35 miles
Explanation:
Since half of 70 is 35.....
Answer:
The heat absorbed in each cycle is 9,234.286 J
Explanation:
Given;
power output, P = 5 kW = 5,000 W
efficiency of the engine, e = 30 % = 0.3
thermal heat expelled, = 6464 J
let the heat absorbed =
The efficiency of the engine is given as;
Therefore, the heat absorbed in each cycle is 9,234.286 J.
Heat pumps are also known as refrigeration units for heating and cooling homes by taking heat from air outside in the winter time and then reversed to take heat out of the inside of a home in the summertime. The Geothermal heat pumps take heat from the ground by way of buried pipes deep in ground with chemicals such as water and glycol or similar and transfers that heat into homes in the winter time.
Heating buildings
Answer:
7) 5 m/s
8) 1.5 m/s
9) -9 m/s^2
10) 2.2 m/s
11) 5 s
Explanation:
These problems make use of the relations:
a = ∆v/∆t
d = 1/2at^2 . . . . acceleration to/from rest
v^2 = 2ad . . . . . acceleration to/from rest
In each case, choose the formula appropriate to the question, fill in the given values, and solve for what's missing.
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7) v^2 = 2ad
v = √(2(9.8 m/s^2)(1.5 m)) = √(29.4 m^2/s^2) ≈ 5 m/s
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8) d = 1/2at^2
a = 2d/t^2 = 2(75 m)/(10 s)^2 = 1.5 m/s^2
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9) a = ∆v/∆t
a = (-45 m/s)/(5 s) = -9 m/s^2
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10) a = ∆v/∆t
∆v = a·∆t = (0.09 m/s^2)(10 s) = 0.9 m/s
Vivian's final speed is the initial speed plus the change in speed:
1.3 m/s + 0.9 m/s = 2.2 m/s
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11) a = ∆v/∆t
∆t = ∆v/a = (0.50 cm/s -0.75 cm/s)/(-0.05 cm/s^2) = -.25/-.05 s = 5 s
That 'band' around the globe is called the "Tropic Zone". It's the entire part of the surface of the Earth where the sun can ever be directly overhead.