All categories

3 years ago

A light bulb is switched on and within a few minutes its temperature becomes constant. Is it at equilibrium or steady state.

Engineering

1 answer:

EleoNora [17]3 years ago

6 0

Answer:

The temperature attains equilibrium with the surroundings.

Explanation:

When the light bulb is lighted we know that it's temperature will go on increasing as the filament of the bulb has to constantly dissipates energy during the time in which it is on. Now this energy is dissipated as heat as we know it, this heat energy is absorbed by the material of the bulb which is usually made up of glass, increasing it's temperature. Now we know that any object with temperature above absolute zero has to dissipate energy in form of radiations.

Thus we conclude that the bulb absorbs as well as dissipates it's absorbed thermal energy. we know that this rate is dependent on the temperature of the bulb thus it the temperature of the bulb does not change we can infer that an equilibrium has been reached in the above 2 processes i.e the rate of energy absorption equals the rate of energy dissipation.

Steady state is the condition when the condition does not change with time no matter whatever the surrounding conditions are.

You might be interested in

Calculate the biaxial stresses σ1 and σ2 for the biaxial stress case, where ε1 = .0020 and ε2 = –.0010 are determined experiment

Llana [10]

Answer:

i) σ1 = 133.5 MPa

σ2 = -2427 MPa

ii) 78.89 MPa

Explanation:

Given data:

ε1 = 0.0020 and ε2 = –0.0010

E = 71 GPa

v = 0.35

<u>i) Determine the biaxial stresses σ1 and σ2 using the relations below</u>

ε1 = σ1 / E - v (σ2 / E) -----( 1 )

ε2 = σ2 / E - v (σ1 / E) -------( 2 )

resolving equations 1 and 2

σ1 = E / 1 - v^2 { ε1 + vε2 } ---- ( 3 )

σ2 = E / 1 - v^2 { ε2 + vε1 } ----- ( 4 )

input the given data into equation 3 and equation 4

σ1 = 133.5 MPa

σ2 = -2427 MPa

<u>ii) Calculate the value of the maximum shear stress ( Zmax )</u>

Zmax = ( σ1 - σ2 ) / 2

= 133.5 - ( - 2427 ) / 2

= 78.89 MPa

3 0

3 years ago

3. Ang mga kababaihan noon ay tumutulong sa pakikipaglaban sa mga Espanyol upang makamit ang Kalayaan. Ganito pa rin ba ang mga

likoan [24]

NYC dp my frndsssssssssss

5 0

2 years ago

If using the washer results in the wheel brake units getting wet, ensure that the vehicle is driven for a short distance with th

Elden [556K]

Answer:

whats the question

Explanation:

6 0

3 years ago

Read 2 more answers

Estimate the chronic daily intake of toluene from exposure to a city water supply that contains a toluene concentration equal to

enot [183]

Answer:

The chronic daily intake is 0.0328608 mg/kg day

Explanation:

The CDI due to ingestion is equal to:

$CDI=\frac{C*IR*ED*EF}{BW*AT}$

Where

C = concentration = 1 mg/L

IR = 2.3 L/day

ED = risk dying per year = 70 year

EF = number of days per year = 365 days

AT = average tenure time = 75 year

BW = weight of body = 65.4 kg

$CDI=\frac{1*2.3*70*365}{65.4*365*75} =0.0328mg/kgd$

The ingestion rate is:

IR = 20/60 = 0.333 h/day

The CDI due to dermal contact is equal to:

$CDI_{2} =\frac{1*1.69*9x10^{-6}*0.333*70*365 }{65.4*365*75}*0.8x10^{3} =5.41x10^{-5} mg/kgd$

The CDI due to inhalation is equal to:

$CDI_{3} =\frac{0.001*0.471*70*365}{65.4*365*75} =6.7x10^{-6} mg/kgd$

The total is:

CDItotal = 0.0328 + 5.41x10⁻⁵ + 6.7x10⁻⁶ = 0.0328608 mg/kgday

4 0

4 years ago

A scientist who is evaluating an ancient human skeleton for signs of vitamin and nutrient deficiency is conducting:

lawyer [7]

Answer:

paleopathology

Explanation:

Paleopathology is a relatively new discipline.

Paleopathology is mainly the study of the traces of disease left in fossils and mummies. It also includes the study of the signs related to the disease in archaeological objects.

8 0

3 years ago