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Alex777 [14]
4 years ago
8

A man consumes 2055 kcal of food in one day, converting most of it to body temperature. If he loses half this energy by evaporat

ing water (through breathing and sweating), how many kilograms of water evaporate?
Physics
2 answers:
vitfil [10]4 years ago
8 0

Answer:

1.903 kg.

Explanation:

Energy obtained from the food, Q= 2055kCal

Half of the energy lost to evaporating water = 2055/2

= 1027.5 kCal

Latent heat of water, L = 540 kCal/kg

Q= m × L

m = 1027.5/540

= 1.903 kg.

9966 [12]4 years ago
3 0

Answer:

3.81kg

Explanation:

Given that heat lost by man Q= 2055kCal

Latent heat of water L = 540KCal/Kg

Mass of water evaporated = M

Using

Q= ML

2055= M * 540

M= 2055/540

M= 3.81kg

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vagabundo [1.1K]

Answer:

C. Angular Separation

Explanation:

The term angular distance (or separation) is technically synonymous with angle itself, but is meant to suggest the (often vast, unknown, or irrelevant) linear distance between these objects (for instance, stars as observed from Earth).

4 0
3 years ago
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1. What is the temperature in Kelvin and Fahrenheit of silver at 51.4oC?1. What is the temperature in Kelvin and Fahrenheit of s
horsena [70]

Answer:

Temperature in Fahrenheit will be 124.52°F and in kelvin 324.4 K

Explanation:

We have given temperature in of silver in degree Celsius as 51.4^{\circ}C

We have to convert this temperature in Fahrenheit and kelvin

For Fahrenheit

Temperature in Fahrenheit   = \frac{9}{5}\times 51.4+32=124.52^{\circ}F

For kelvin

In kelvin = 51.4+273 = 324.4 K

So temperature in Fahrenheit will be 124.52°F and in kelvin 324.4 K

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Which is true of the buoyant force?
victus00 [196]

It acts in the upward direction.

8 0
3 years ago
Important nuclei of the indirect (multineuronal) system that receive impulses from the equilibrium apparatus of the inner ear an
Lera25 [3.4K]

Answer:

B. Vestibular nuclei

Explanation:

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From the vestibular nuclei, two bundles of fibers descending to the spinal cord originate from the medial and lateral vestibular spinal bundles and a bundle of fiber that rises in the brain stem that participates in the coordination of eye movements, the medial longitudinal fascicle, which participates in Rotational nystagmus This system also participates in an important way in the control of some ocular movements by the fibers that it contributes to the medial longitudinal fascicle, which is a structure that interconnects the motor nuclei of the extrinsic muscles of the eyeballs VI or abdicens nucleus (abductor) on one side and IV or pathetic nucleus (trochlear) and III or nucleus of the common ocular motor (oculomotor) on the opposite side.

6 0
3 years ago
Help please, I don't get it​
Sergio [31]

Answers:

a) \hat F=(0.83,-0.55) N

b) \hat D=(-0.44,-0.89) m

c) \hat V=(-0.47,0.88) m/s

Explanation:

A unit vector is a vector whose magnitude (length) is equal to 1. This kind of vector is identified as \hat v and the way to calculate is as follows:

\hat v=\frac{\vec v}{|v|}

Where:

\vec v=(x,y) is the vector

|v|=\sqrt{x^{2}+y^{2}} is the magnitude of the vector

Having this information clarified, let's begin with the answers:

a) Force Vector

\vec F=(9.0 \hat i - 6.0 \hat j) N

Magnitude of \vec F:

|F|=\sqrt{(9.0 \hat i)^{2}+(-6.0 \hat j)^{2 }}N=10.81 N

<u />

<u>Unit vector:</u>

\hat F=\frac{\vec F}{|F|}

\hat F=\frac{(9.0 \hat i - 6.0 \hat j) N}{10.81 N}

\hat F=\frac{9.0}{10.81} N-\frac{6.0}{10.81}N

\hat F=(0.83,-0.55) N

b) Displacement Vector

\vec D=(-4.0 \hat i - 8.0 \hat j) m

Magnitude of \vec D:

|D|=\sqrt{(-4.0 \hat i)^{2}+(-8.0 \hat j)^{2 }}m=8.94 m

<u />

<u>Unit vector:</u>

\hat D=\frac{\vec D}{|D|}

\hat D=\frac{(-4.0 \hat i - 8.0 \hat j) m}{8.94 m}

\hat D=\frac{-4.0}{8.94} Nm+\frac{-8.0}{8.94}m

\hat D=(-0.44,-0.89) m

c) Velocity Vector

\vec V=(-3.50 \hat i + 6.50 \hat j) m/s

Magnitude of \vec V:

|V|=\sqrt{(-3.50 \hat i)^{2}+(6.50 \hat j)^{2}}m/s=7.38 m/s

<u />

<u>Unit vector:</u>

\hat V=\frac{\vec V}{|V|}

\hat V=\frac{(-3.50 \hat i +6.50 \hat j) m/s}{7.38 m/s}

\hat V=\frac{-3.50}{7.38} m/s+\frac{6.50}{7.38}m/s

\hat V=(-0.47,0.88) m/s

8 0
4 years ago
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