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4 years ago

Do you think you could identify a mystery substance using only its mass or weight? Explain your answer.

Physics

1 answer:

Fed [463]4 years ago

3 0

Answer:

Explanation:

Because if you only measure it by its mass, or weight there could be other substances with the same mass, or weight. If you wanna identify it then list the color, and streak

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Do black holes have an internal structure? If so, how might the internal structure be probed?

oksian1 [2.3K]

Answer:

Explanation:

it can't be probed it would be like probing a goat's butt

5 0

3 years ago

Read 2 more answers

how long will it take you to travel from rustburg hign school to watch the Devils beat the brookville bees if you live 20 miles

tresset_1 [31]

(20 miles) x ( 1/45 hour/mile) =

(20/45) (hour) = 

4/9 hour = 26 minutes 40 seconds

7 0

3 years ago

An electromagnetic wave with frequency 65.0Hz travels in an insulating magnetic material that has dielectric constant 3.64 and r

lakkis [162]

Answer:

The wavelength of the wave is $1.06\times10^6 m$

Explanation:

Lets calculate

We know an electromagnetic wave is propagating through an insulating magnetic material of dielectric constant K and relative permeability $K_m$ ,then the speed of the wave in this dielectric medium is $\nu$ is less than the speed of the light c and is given by a relation

$\nu=\frac{c}{\sqrt{KK_m} }$ --------- 1

In case the electromagnetic wave propagating through the insulating magnetic material , the amplitudes of electric and magnetic fields are related as -

$E_m_a_x= \nu B_m_a_x$

The magnitude of the 'time averaged value' of the pointing vector is called the intensity of the wave and is given by a relation

$I = S_a_v$

$\frac{E_m_a_xB_m_a_x}{2K_m\mu0}$ ----------- 3

now , we will find the speed of the propagation of an electromagnetic wave by using equation 1

$\nu=\frac{c}{\sqrt{KK_m} }$

Putting the values ,

= $\nu= \frac{3.00\times10^8}{\sqrt{(3.64)(5.18)} }$

= $0.6908\times10^8m/s$

= $6.91\times10^7m/s$

Now , using this above solution , we will find the wavelength of the wave -

$\lambda=\frac{\nu}{f}$

Putting the values from above equations -

$\frac{6.91\times10^7m/s}{65.0Hz}$

$\lambda= 1.06\times10^6 m$

Hence , the answer is $\lambda= 1.06\times10^6 m$

8 0

3 years ago

What is the approximate size of the Earth's magnetic field? (dont ask me to specify thats what the question is and im as confuse

Olegator [25]

Answer:

The Earth's magnetic field intensity is roughly between 25,000 - 65,000 nT (.25 -.65 gauss).

Explanation:

To measure the Earth's magnetism in any place, we must measure the direction and intensity of the field. The Earth's magnetic field is described by seven parameters. These are declination (D), inclination (I), horizontal intensity (H), the north (X), and east (Y) components of the horizontal intensity, vertical intensity (Z), and total intensity (F). The parameters describing the direction of the magnetic field are declination (D) and inclination (I). D and I are measured in units of degrees, positive east for D and positive down for me. The intensity of the total field (F) is described by the horizontal component (H), vertical component (Z), and the north (X) and east (Y) components of the horizontal intensity. These components may be measured in units of gauss but are generally reported in nanoTesla (1nT * 100,000 = 1 gauss). The Earth's magnetic field intensity is roughly between 25,000 - 65,000 nT (.25 - .65 gauss). Magnetic declination is the angle between magnetic north and true north. D is considered positive when the angle measured is east of true north and negative when west. The magnetic inclination is the angle between the horizontal plane and the total field vector, measured positive into Earth. In older literature, the term “magnetic elements” is often referred to as D, I, and H.

8 0

3 years ago

A 60.0-kg person rides in an elevator while standing on a scale. the scale reads 400 n. the acceleration of the elevator is clos

Keith_Richards [23]

Reading of the scale will be given as Normal force on the man

So here we can say that

weight of the mas will be

$W = mg = 60*10 = 600 N$