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Natalija [7]
3 years ago
9

What is the meaning of lightyear?

Physics
1 answer:
puteri [66]3 years ago
7 0
"Lightyear" is a <em>distance</em> ... specifically, the distance that light travels
through vacuum in one year of 365 days.

It's equivalent to  9.454 x 10^12 kilometers, or  5.875 x 10^12 miles . 
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Por una espira de 0.5 m2 de área circula una corriente de 5 A. Calcula la densi- dad de flujo magnético B considerando que la es
Sloan [31]

Answer:

\beta=B=8.05\mu T

Explanation:

The density of the magnetic flux is given by the following formula:

\beta=\frac{\Phi_B}{A}=\frac{ABcos\theta}{A}=Bcos\theta

The normal vector A and the vector of the magnitude of the magnetic field are perpendicular, then, the angle is zero:

The magnitude of the magnetic field is calculated by using the formula for B at a distance of x to a point in the plane of the loop:

B=\frac{\mu_oIR^2}{2(x^2+R^2)^{3/2}}

For x = 0 you have:

B=\frac{\mu_oIR^2}{2R^3}=\frac{\mu_oI}{2R}

R is the radius of the circular loop and its values is:

R=\sqrt{\frac{A}{\pi}}=\sqrt{\frac{0.5m^2}{\pi}}=0.39m

Then, you replace in the equation for B with mu_o = 4\pi*10^-7 T/A:

B=\frac{(4\pi*10^{-7}T/A)(5A)}{2(0.39m)}=8.05*10^{-6}T=8.05\mu T

and the density of the magnetic flux is

\beta=B=8.05\mu T

4 0
4 years ago
Blood pressure is usually expressed by two numbers. What are those two numbers called?
sergiy2304 [10]
Top number is  your <span>systolic </span><span>pressure 

Bottom number is your </span>diastolic<span> </span><span> </span>pressure<span> 

Hoped this helped

</span>
8 0
3 years ago
Read 2 more answers
How many meters are in 45 centimeters?
adell [148]

Explanation:

100 CM = 1 m

45 CM = 45 / 100 = 0.45 m

hope it helps:)

6 0
3 years ago
Read 2 more answers
1.Wave motion that is parallel to the wave direction is described 
Dafna1 [17]

Answer:

Explanation:

A wave is a phenomenon that travels through a material medium without any permanent effect on the medium. It can be classified as mechanical or electromagnetic waves. And the two major types are transverse and longitudinal.

From the given question;

1. Longitudinal waves e.g sound waves, waves in a spring'

2. Frequency (number of cycles per second).

3. Wavelength of the wave. Measured in meters.

4. Transverse waves e.g light waves, water waves.

5. Wave speed.

6. Electromagnetic waves e.g ultraviolet waves, X-rays etc.

7. Amplitude.

8. Hertz.

9. Rarefaction

10. Compression

7 0
3 years ago
The nucleus of an atom can have either a positive or negative charge. please select the best answer from the choices provided t
Airida [17]
F - False.

The nucleus of an atom is positively charge.
5 0
3 years ago
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