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
NeTakaya
3 years ago
14

For a refrigerator, COP<1 a) True b) False

Engineering
1 answer:
WINSTONCH [101]3 years ago
4 0

Answer:

False

Explanation:

COP is Coeficient of performance, it relates useful heat moved with work consumed, it is used in refrigerators and heat pumps.

For refrigerators the useful heat is the one extracted from the cold reservoir. Therefore:

COP = \frac{Tcold}{T.hot - Tcold}

This often exceeds 1.

You might be interested in
4.
lorasvet [3.4K]

Answer: observational error

Explanation:

6 0
3 years ago
ferry boat steamed along at 8 mph through calm seas, passenger casey exercised by walking the perimeter of the rectangular deck,
olga_2 [115]
Tell me why i got this question got it right and now won’t remember but i’ll get back at you when i remember
6 0
3 years ago
What are the 5 major forest types?
Nataly [62]

Answer:

1. Equatorial Evergreen or Rainforest

2. Tropical forest

3. Mediterranean forest

4. Temperate broad-leaved forest

5. Warm temperate forest

Explanation:

4 0
4 years ago
Read 2 more answers
A square silicon chip (k = 152 W/m·K) is of width 7 mm on a side and of thickness 3 mm. The chip is mounted in a substrate such
Harrizon [31]

Answer:

The steady-state temperature difference is 2.42 K

Explanation:

Rate of heat transfer = kA∆T/t

Rate of heat transfer = 6 W

k is the heat transfer coefficient = 152 W/m.K

A is the area of the square silicon = width^2 = (7/1000)^2 = 4.9×10^-5 m^2

t is the thickness of the silicon = 3 mm = 3/1000 = 0.003 m

6 = 152×4.9×10^-5×∆T/0.003

∆T = 6×0.003/152×4.9×10^-5 = 2.42 K

7 0
4 years ago
All of these are true about steel EXCEPT that:
natta225 [31]

Answer:B) heat tends to strengthen high-strength steel.

Explanation: You are right it is B

3 0
2 years ago
Other questions:
  • Use Newton's method to determine the angle θ, between 0 and π/2 accurate to six decimal places. for which sin(θ) = 0.1. Show you
    12·1 answer
  • A fluid of density 1400 kg/m^3 and viscosity of 0.9 kg/m.s flows through an 80 mm diameter pipe with a velocity of 5 m/s. What t
    6·1 answer
  • 6. You are an electrician working in an industrial plant. You are building a motor control cabinet that contains six motor start
    6·1 answer
  • When fermentation units are operated with high aeration rates, significant amounts of water can be evaporated into the air passi
    13·1 answer
  • A cube with 1 m on a side is located in the positive x-y-z octant in a Cartesian coordinate system, with one of its points locat
    8·1 answer
  • Based on parameters such as the materials shear modulus, diameter of the wire, mean coil diameter, and number of active coils (a
    11·1 answer
  • How do I cancel Trial subscription
    15·1 answer
  • Learning Goal: To use fundamental geometric and statics methods to determine the state of plane stress at the point on an elemen
    8·1 answer
  • Stucco will shrink as it hardens and cures.<br> A. true<br> B. false
    11·1 answer
  • A plate of width 84mm and thickness 10mm is to be welded to another plate by means of double parallel fillets. The plates are su
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!