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lys-0071 [83]
3 years ago
15

What does WA mean in Friction?

Physics
1 answer:
antoniya [11.8K]3 years ago
3 0
I think WA in friction means Water Absorption.
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A python can detect thermal radiation from objects that differ in temperature from their environment as long as the received int
yanalaym [24]

Answer:

10.52 m

Explanation:

The power radiated by a body is given by

P = σεAT⁴ where ε = emissivity = 0.97, T = temperature = 30 C + 273 = 303 K, A = surface area of human body = 1.8 m², σ = 5.67 × 10⁻⁴ W/m²K⁴

P = σεAT⁴ = 5.67 × 10⁻⁸ W/m²K⁴ ×  0.97 × 1.8 m² × (303)⁴ = 834.45 W

This is the power radiated by the human body.

The intensity I = P/A where A = 4πr² where r = distance from human body.

I = P/4πr²

r = (√P/πI)/2

If the python is able to detect an intensity of 0.60 W/m², with a power of 834.45 W emitted by the human body, the maximum distance r, is thus

r = (√P/πI)/2 = (√834.45/0.60π)/2 = 21.04/2 = 10.52 m

So, the maximum distance at which a python could detect your presence is 10.52 m.

3 0
3 years ago
(a) A submarine descends to a depth of 70 m below the surface of water. The density of the water is 1050 kg/m3. Atmospheric pres
timurjin [86]

Answer:

sttouyietETwe2e664yrwtwwteuwtrwruwuuwwuwtwuw7w7w5w7w772253536464647

5 0
3 years ago
What is observed that connects radio emissions in the galactic nucleus with the emissions in the halo or radio lobes?
Licemer1 [7]

Answer:

What is observed that connects radio emissions in the galactic nucleus with the emissions in the halo or radio lobes? There is a jet of matter coming out of the nucleus, which often points toward the lobes.

5 0
1 year ago
Ask Your Teacher A coil is formed by winding 260 turns of insulated 16 gauge copper wire (diameter = 1.3 mm) in a single layer o
Liula [17]

Answer:

The resistance is 2.98Ω

Explanation:

<u>Data</u>

diameter:  d=1.3mm, d=1.3*10^{-3} m

Radius:    r=\frac{d}{2} ,r=\frac{1.3*10^{-3} }{2} ,r=6.5*10^{-4} m

Resistivity constant:   p=1.65*10^{-8}Ωm

To find Area:

A=\pi r^{2} \\A=\frac{22}{7} *(6.5*10^{-4} )\\A=1.33*10^{-6} m^{2}

To find circumference:

l=260*(2\pi (0.15))\\l=245.04m

Now we can apply the Resistivity formula:

R=p\frac{l}{A}

R=(1.65*10^{-8} )Ωm*\frac{240.04m}{1.33*10^{-6}m^{2}  }

R=2.98Ω

4 0
3 years ago
The radius of the aorta is about 1.4cm , and the blood passing through it has a speed of about 40cm/s .
Lapatulllka [165]

For the average speed of blood flow in the major arteries of the body  is mathematically given as

v2 = 117.29m/s

<h3>What is the average speed of blood flow in the major arteries of the body?</h3>

Generally, the equation for the average speed  is mathematically given as

A1 v1 = A2 v2

(pi r1^2) v1 = A2 v2

(3.14x(1.4)^2 )x 40 = (2.1) xV2

v2 = 117.29m/s

In conclusion, the average speed of blood flow

v2 = 117.29m/s

Read more about Speed

brainly.com/question/4931057

4 0
2 years ago
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