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Viktor [21]
3 years ago
15

Urgente!!!!! Necesito ayuda con esto!!!!

Physics
1 answer:
ahrayia [7]3 years ago
5 0
media.discordapp.net/attachments/782414373888458783/826224189828366377/video0.mp4
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Estimate the mass of water that must evaporate from the skin to cool the body by 0.55 ∘c. assume a body mass of 100 kg and assum
Gala2k [10]

Heat required to decrease the temperature of body is given as

Q = ms\Delta T

here given that

m = 100 kg

s = 4 J/g ^0C = 4000 J/Kg ^0C

\Delta T = 0.55^0C

now by above equation

Q = 100 \times 4000 \times 0.55

Q = 220,000 J

now in order to evaporate water the heat is given as

Q = mL

220000 = m \times 2.25 \times 10^6

m = 0.097 kg

m = 97 g

so 97 g of water will evaporate from the body

4 0
3 years ago
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A small block with mass 0.0350 kgkg slides in a vertical circle of radius 0.550 mm on the inside of a circular track. During one
Lisa [10]

Answer:

 W_net = μ 5.58,   μ = 0.1     W_net = 0.558 J

Explanation:

The work is defined by the related

          W = F. d ​​= F d cos θ

where bold indicates vectors.

In the case, the work of the friction force on a circular surface is requested.

The expression for the friction force is

              fr = μ N

the friction force opposes the movement, therefore the angle is 180º and the cos 180 = -1

               W = - fr d

the path traveled half the length of the circle

               L = 2 π R

               d = L / 2

               d = π R

we substitute

                 W = - μ N d

Total work is initial to

                W_neto = - μ π R (N_b - N_a)

let's calculate

                W_net = - μ π 0.550 (0.670 - 3.90)

                W_net = μ 5.58

for the complete calculation it is necessary to know the friction coefficient, if we assume that μ = 0.1

                W_net = 0.1 5.58

                W_net = 0.558 J

7 0
3 years ago
Two identical space probes are orbiting Jupiter. Scientists determine that one of the space probes has a larger gravitational fo
galina1969 [7]

If the probes are identical, then the one that feels a larger gravitational
force is orbiting closer to Jupiter than the other one is.

If they're not identical, then the one with greater mass will feel more
gravitational force than the one with less mass, even if they're both
the same distance from Jupiter.  (We know this from the experimental
observation that fatter people weigh more, even on Earth.)
6 0
3 years ago
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What would a velocity of a rock dropped from a cliff be after falling for 6 seconds?
Ivenika [448]

Answer:

  A. 58.8m/s

Explanation:

The acceleration due to gravity is 9.8 m/s², so the velocity after 6 seconds is ...

  v = at

  v = (9.8 m/s²)(6 s) = 58.8 m/s

5 0
3 years ago
Question 6 of 15
Vera_Pavlovna [14]

Answer: sliding

Explanation:

4 0
4 years ago
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