1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergeinik [125]
3 years ago
11

It has been suggested that a heat engine could be developed that made use of the fact that the temperature several hundred meter

s beneath the surface of the ocean is several degrees colder than the temperature at the surface. In the tropics, the temperature may be 6 degrees C and 22 degrees C, respectively. What is the maximum efficiency (in %) such an engine could have?
Physics
1 answer:
lesantik [10]3 years ago
8 0

Answer:

efficiency = 5.4%

Explanation:

Efficiency of heat engine is given as

\eta = \frac{W}{Q_{in}}

now we will have

W = Q_1 - Q_2

so we will have

\eta = 1 - \frac{Q_2}{Q_1}

now we know that

\frac{Q_2}{Q_1} = \frac{T_2}{T_1}

so we have

\eta = 1 - \frac{T_2}{T_1}

\eta = 1 - \frac{273+6}{273+22}

\eta = 0.054

so efficiency is 5.4%

You might be interested in
Which factor affects elastic potential energy but not gravitational potential energy?
Vika [28.1K]

Answer:

The correct answer is the spring constant (k)

Explanation:

  • Elastic potential energy:  Epe = ½ * k * Δx²

k = spring constant

Δx = displacement

  • Gravitational ptential energy: Ep = m*g*h

g = (acceleration due to gravity)

m = mass

h =  relative height of an object to some reference point

3 0
3 years ago
Read 2 more answers
Another unfortunate bug splatters on the windshield of a moving car. Which has the greater change in momentum---the bug or the c
bija089 [108]

Answer:

The change in momentum for the bug and the car will be equal, impulses will be equal in opposite directions and the bug will have a greater acceleration compared to the car, because it has a smaller mass.

Explanation:

Hope this helps..

4 0
3 years ago
An aluminium bar 600mm long, with diameter 40mm, has a hole drilled in the center of the bar. The hole is 30mm in diameter and i
arsen [322]

Answer:

Explanation:

l = 600mm = 0.6m

d = 40mm = 0.04m

hd = 30mm = 0.03m (diameter of the hole)

hl = 100mm = 0.1m (hole length)

modulus of elasticity for the aluminium = 85GN/m2

compressive load = 180kN

6 0
3 years ago
In a mass spectrometer, a single-charged particle (charge e) has a speed of 1.0 × 10 6 m/s and enters a uniform magnetic field o
Nonamiya [84]

Answer:

The mass is  m  =6.4*10^{-28} \ kg

Explanation:

From the question we are told that

   The  speed of the charge is  v   = 1.0 *10^{6} \  m/s

    The  magnetic field is  B = 0.20 \ T

     The radius is r  =  0.02 \ m

      The value of the charge is  e  = 1.60 *10^{-19} \  C

The centripetal acting on the charge moving in the circular orbit is mathematically represented as

        F_c  =  \frac{mv^2}{r }

Now this centripetal force is due to the force exerted on the charge by the magnetic field on the charge which is mathematically represented as

     F_m  =  qv  B  sin\theta

At the maximum of this magnetic force \theta =  90 ^o

So  

     F_m  =  e v  B  sin(90)

      F_m  =  e v  B

Now given that it is this  magnetic force that is causing the circular motion we have that

       F_c  =  F_m

=>     \frac{mv^2}{r }  =  ev  B

=>     m  = \frac{e * B  *  r  }{v }

substituting values

       m  = \frac{ 1.60 *10^{-19} *  0.20   *  0.020   }{1.0*10^{6} }

     m  =6.4*10^{-28} \ kg

8 0
4 years ago
Which material is colder in a room where all the objects are in for a long time?
Ahat [919]
Wooden desk it doesn’t conduct or absorb heat as much as metal or plastic
3 0
3 years ago
Other questions:
  • Resistance and resistivity are related by a:
    14·1 answer
  • A conductor is formed into a loop that encloses an area of 1m^2. The loop is oriented at a angle 30 degree with the xy plane. A
    7·1 answer
  • According to Jean Piaget, unrealistic idealism often occurs in adolescence as a result of __________.
    11·2 answers
  • A positively charged body exerts an electric field that causes a positively charged particle to move away from it. If work is do
    11·1 answer
  • energy expenditure due to physical activity generally accounts for __________ of total energy expenditure.
    15·1 answer
  • What are two properties of amorphous solids?
    10·1 answer
  • Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 500 above the e
    9·1 answer
  • How can you use biome in a sentence?
    11·1 answer
  • The flow of electrons throughout a circuit is known as
    11·2 answers
  • What is electric potential
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!