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laila [671]
3 years ago
7

The USDA recommends that women consume about 2000 Calories per day and men consume about 2500 Calories per day. How much average

power use (in Watts) does this imply for a human body
Physics
1 answer:
professor190 [17]3 years ago
4 0

Answer:

   1500 W to 2200 W

Explanation:

Every person does work in his daily day to day life. A person needs energy in order to perform work. And the energy consumed by an individual while performing a daily work is directly responsible to the mount of oxygen consumed by the person.

The USDA is the federal agency which looks after the food and agriculture matters of the US government. It deals with and formulates different policies and laws for the country and it s people. It recommends about 2000 calories per day for women and for men it recommends about 2500 calorie per days of food intake.

Accordingly, the average power required by a human body for doing regular work is in the range of 1500 W to 2200 W.

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A 2.0 mm diameter wire of length 20 m has a resistance of 0.25 ȍ. what is the resistivity of the wire?
olasank [31]
The relationship between resistance R and resistivity \rho is
R= \frac{\rho L}{A} (1)
where L is the length of the wire and A is the cross-sectional area.

In our problem, the radius of the wire is half the diameter: r=1 mm=0.001 m, so the cross-sectional area is
A=\pi r^2 = \pi (0.001 m)^2=3.14 \cdot 10^{-6} m^2
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By re-arranging equation (1), we can find the resistivity of the wire:
\rho =  \frac{RA}{L}= \frac{(0.25 \Omega)(3.14 \cdot 10^{-6} m^2)}{(20 m)} = 3.93 \cdot 10^{-8} \Omega \cdot m
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3 years ago
A 4.04 kg block slides down a smooth, frictionless plane having an inclination of 30◦. The acceleration of gravity is 9.8 m/s^2.
aleksandrvk [35]

Answer:

Explanation:

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