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Alja [10]
3 years ago
10

There has long been an interest in using the vast quantities of thermal energy in the oceans to run heat engines. A heat engine

needs a temperature difference, a hot side and a cold side. Conveniently, the ocean surface waters are warmer than the deep ocean waters. Suppose you build a floating power plant in the tropics where the surface water temperature is ≈≈ 30 ∘C∘C. This would be the hot reservoir of the engine. For the cold reservoir, water would be pumped up from the ocean bottom where it is always ≈≈ 5 ∘C∘C.What is the maximum possible efficiency of such a power plant? In%.
Physics
1 answer:
barxatty [35]3 years ago
6 0

Answer:

\eta_{th} = 8.247\%

Explanation:

The maximum possible efficiency for the floating power plant is given by the Carnot's Efficiency:

\eta_{th} = \left(1-\frac{278.15\,K}{303.15\,K}  \right)\times 100\%

\eta_{th} = 8.247\%

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sammy [17]

The force exerted by student A with his scooter is 306 N and that of student B is 204 N.

<h3>Force applied by each student</h3>

The force exerted by each student is calculated from Newton's second law of motion.

F = ma

where;

  • m is mass
  • a is acceleration

F(A) = 127.5 x 2.4

F(A) = 306 N

F(B) = 120 x 1.7

F(B) = 204 N

Thus, the force exerted by student A with his scooter is 306 N and that of student B is 204 N.

Learn more about force here: brainly.com/question/12970081

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2 years ago
A man with a mass of 60 kg rides a bike with a mass of 13 kg. What is the force needed to accelerate the bike at 0.90 m/s2?
Scrat [10]
The total mass of the things on the road is 60 + 13, which is 73kg.

mass • acceleration = F

73 x 0.9m/s^2 = 65.7N

F = 65.7 N

7 0
2 years ago
3. According to the National Automobile Dealers Association, a single dealership may employ people with as many as 57 different
weeeeeb [17]
I think it might just be c because that is the only reasonable option
4 0
3 years ago
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A 400g mass object at rest is acted on by a 200 N net force for 12 seconds. What is it’s final velocity?
Kisachek [45]

Explanation:

do we can say that the first step is finding the acceleration of the object. We do so by saying F = ma

so a = F/m

a = 500 m/s^2

we now have the time, acceleration and initial velocity.

so we can find the final velocity by using one of newtons equations which is: vf = vi + at

so:

vf = 0 + 500 × 12

vf = 6000

note that our initial velocity was zero since the object was initially at rest.

if you still have any doubt dont hesitate to ask for further help.

3 0
2 years ago
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tensa zangetsu [6.8K]

Answer:

Velocity

Explanation:

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