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Anettt [7]
3 years ago
6

A study showed the average basal metabolic rate of a human to be about 1500 kcal/day (6279 kJ/day). If it were possible to const

ruct a bathtub in which there was no loss of heat to the surroundings, and the tub contained 25 gallons of 23 C water, what would be the final temperature of the water after an average human immersed their body in the water for 2 hours?
Physics
1 answer:
Savatey [412]3 years ago
3 0

Answer:

T_f = 24.32 degree celcius

Explanation:

given details:

Q = 6279 kJ/day

V = 25 gal

T = 23°C

we know that heat released can be written as

Q = m*Cp*(T_f -T_i)

Q = 6279 kJ/24 h *2h = 523.25 kJ

V = 25 gal = 94.6353 l tr

density of water is 1 kg/cm3

so, m = 94.65 kg

then

523.25 = 94.65*4.18* (T_f - 23)

T_f = 24.32°C

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How high off the ground must you be if you mass is 75 kg and you have 11,025 J of energy stored inside?
pashok25 [27]

Answer:

15 m

Explanation:

Given,

Mass ( m ) = 75 kg

Potential energy ( P.E ) = 11,025 J

To find : Hight ( h )

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3 0
2 years ago
Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.23 2.23 times a second. A tack is stuck in the t
elena-14-01-66 [18.8K]

Explanation:

The given data is as follows.

       Angular velocity (\omega) = 2.23 rps

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First, we will convert revolutions per second into radian per second as follows.

             = 2.23 revolutions per second

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Now, tangential speed will be calculated as follows.

  Tangential speed, v = R \times \omega

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                               = 5.31 m/s

Thus, we can conclude that the tack's tangential speed is 5.31 m/s.

8 0
3 years ago
An electric hoist does 56,447 J of work in raising 115 kg load. How high (in meters) was the load lifted?
Ugo [173]

\\ \rm\rightarrowtail W=mgh

\\ \rm\rightarrowtail 56447=1150h

\\ \rm\rightarrowtail h=56447/11150

\\ \rm\rightarrowtail h=49.1m

8 0
3 years ago
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