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
nevsk [136]
3 years ago
14

El cuerpo de una persona está cubierto con 1.6 m2 de ropa de lana. El grosor de la lana es 2.0 x 10-3 metro. La temperatura en l

a superficie exterior de la lana es 11 C, y la temperatura de la piel es de 36 ˚C. klana=0.04 W/m ˚C. ¿Cuánto calor por segundo pierde la persona debido a la conducción?. R/800 J/s.
Physics
1 answer:
netineya [11]3 years ago
8 0

Answer:

<h2>Rate of heat transfer from the body of the person is given as</h2><h2>\frac{dQ}{dt} = 800 J/s</h2>

Explanation:

As we know that the rate of heat transfer due to thermal conduction is given as

\frac{dQ}{dt} = \frac{kA(T_2 - T_1)}{x}

so we have

k = 0.04 W/m C

A = 1.6 m^2

x = 2\times 10^{-3} m

\frac{dQ}{dt} = \frac{(0.04)(1.6)(36 - 11)}{2 \times 10^{-3}}

\frac{dQ}{dt} = 800 J/s

You might be interested in
Which object will have the greatest change in
Brut [27]
(4) a metal sphere with a charge of 1.0 × 10^−9 C <span>moved through a potential difference of 4.0 V would undergo the greatest change in electrical energy from the list. </span>
4 0
3 years ago
The concrete slab of a basement is 11 m long, 8 m wide, and 0.20 m thick. During the winter, temperatures are nominally 17°C and
mina [271]

Answer:

\frac{dQ}{dt}= 4312 W

Explanation:

As we know that base of the slab is given as

A = 11 \times 8

A = 88 m^2

now we know that rate of heat transfer is given as

\frac{dQ}{dt} = \frac{kA}{x} (T_2 - T_1)

here we know that

k = 1.4 W/m k

Also we have

x =0.20

\frac{dQ}{dt} = \frac{1.4(88)}{0.20}(17 - 10)

\frac{dQ}{dt}= 4312 W

7 0
3 years ago
A cube of an unknown element has a shiny, silvery color. The side of the cube measures 2.0 cm and the cube has a mass of 14.56 g
shepuryov [24]

Answer: beryllium

Explanation: i took the test i got it right!!

8 0
3 years ago
The emissivity of an ideal reflector has which of the following values?
Wittaler [7]

Emissivityis a measure of how much thermal radiation a body emits to its environment. On the other hand we have that reflectivity is a measure of how much is reflected, and transmissivity  is a measure of how much passes through the object. If a body is required to be ideally reflective to its maximum efficiency, the body should NOT have the property of transmissivity or emissivity. Therefore it should be 0 its emittivity.

Correct answer would be A : ZERO.

4 0
4 years ago
Which description accurately describes the tide represented by the image below?
igomit [66]
<span>The gravitational pull of the sun and moon combined
create larger than normal tides.</span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • A car, on a straight road, is stopped at a traffic light. When the light turns to green the car accelerates with a constant acce
    11·1 answer
  • Rings of dust and icy particles are found around which planets? a. all planets which have moons associated with them b. only Sat
    8·1 answer
  • Heat is distributed through the atmosphere by winds<br> True<br><br> False
    9·1 answer
  • Please help.: Sliding from left to right in a straight line on a horizontal steel surface, an aluminum block weighing 20 newtons
    12·2 answers
  • Three resistors are connected in series. What is the total resistance in the circuit if the current that flows through the wires
    13·1 answer
  • PLS ANSWER FAST WILL GIVE BRAINLYEST!!!!!!!
    11·1 answer
  • 50 POINTS/BRAINLIEST TO CORRECT!
    11·1 answer
  • How can you put a lever into a rube goldberg machine? answer ASAP
    8·2 answers
  • What should you do in the intermediate steps of a numerical calculation?
    11·1 answer
  • See the attachment for the question
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!