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
n200080 [17]
3 years ago
13

Can you reduce energy use without compromising people's basic needs (such as opening a car, cooking food, home lighting, electri

c power and technology, etc.)? give various examples
Engineering
1 answer:
Liono4ka [1.6K]3 years ago
4 0

Answer:

   yes

  • electric and/or hybrid cars
  • microwave ovens
  • LED lighting
  • low-power electronics

Explanation:

Advances in technology and changes in social organization have brought about reductions in energy use on many fronts.

  • hybrid/electric vehicles have reduced transportation energy needs
  • microwave ovens have reduced cooking energy needs
  • LED lighting has reduced lighting energy needs
  • low-power electronics have reduced the energy cost of technology and entertainment
  • heat pumps and insulated windows have reduced energy needs for home heating and cooling
  • zoning laws have reduced the need for travel to work and shopping areas
You might be interested in
A food department is kept at -12 °C by a refrigerator in an environment at 30 °C. The total heat gain to the food department is
Nataly [62]

Answer: P = 0.416 kW

Explanation:

taken a step by step process to solving this problem.

we have that from the question;

the amount of heat rejected Qn = 4800 kJ/h

the cooling effect is Ql = 3300 kJ/h

Applying the first law of thermodynamics for this system gives us

Шnet = Qn -Ql

Шnet = 4800 - 3300 = 1500 kJ/h

Next we would calculate the coefficient of performance of the refrigerator;

COPr = Desired Effect / work output = Ql / Шnet  = 3300/1500 = 2.2

COPr = 2.2

The Power as required gives;

P = Qn - Ql  = 4800 - 3300 = 1500 kJ/h = 0.416

P = 0.416 kW

cheers i hope this helps!!!!1

5 0
3 years ago
A power company desires to use groundwater from a hot spring to power a heat engine. If the groundwater is at 95 deg C and the a
prisoha [69]

Answer:

W  = 12.8 KW

Explanation:

given data:

mass flow rate = 0.2 kg/s

Engine recieve heat from ground water at 95 degree ( 368 K)  and reject that heat to atmosphere  at 20 degree (293K)

we know that maximum possible efficiency is given as

\eta = 1- \frac{T_L}{T_H}

\eta = 1 - \frac{ 293}{368}

\eta = 0.2038

rate of heat transfer is given as

Q_H = \dot m C_p \Delta T

Q_H = 0.2 * 4.18 8(95 - 20)

Q_H = 62.7 kW

Maximuim power is given as

W = \eta Q_H

W = 0.2038 * 62.7

W  = 12.8 KW

3 0
2 years ago
So in my settings i set it to send notifications too my email so ik when smtn happens but it doesn't even send stuff too it.....
attashe74 [19]

Answer:

Did you make sure you did it and your notifications are on

3 0
3 years ago
What is the reason for the development of new construction of materials for human use? (Select all that apply.)
salantis [7]

Answer:

All 4 could be justified.

Explanation:

They all represent ultimate improvement.

7 0
2 years ago
A civil engineer is studying a left-turn lane that is long enough to hold seven cars. Let X be the number of cars in the line at
BartSMP [9]

Answer:

a) C= 1/120

b) P(X>=5) = 0.333

Explanation:

The attached file contains the explanation for the answers

7 0
3 years ago
Read 2 more answers
Other questions:
  • This assignment covers the sequential circuit component: Register and ALU. In this assignment you are supposed to create your ow
    13·1 answer
  • The dry unit weight of a soil sample is 14.8 kN/m3.
    12·1 answer
  • Let suppose, you are going to develop a web-application for school management system. Then what architectural pattern will you u
    9·1 answer
  • Is a 68.75 and a 70 a pass in 5th grade?
    10·2 answers
  • Traditional password entry schemes are susceptible to "shoulder surfing" in which an attacker watches an unsuspecting user enter
    13·1 answer
  • A rectangular block having dimensions 20 cm X 30 cm X 40 cm is subjected to a hydrostatic stress of -50 kPa (i.e. under compress
    15·1 answer
  • You are watching the weather forecast and the weatherman says that strong thunderstorms and possible tornadoes are likely to for
    15·1 answer
  • As a top-level executive at your own company, you are worried that your employees may steal confidential data too easily by down
    12·1 answer
  • Kaya just bought a house and realizes that the chimney needs to be totally torn down and rebuilt. She needs to call an expert si
    6·1 answer
  • What type of social engineering targets particular?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!