when wire is coiled upon a nail then it will posses magnetic characteristics
This is due to the coiled shape it will behave like a solenoid and the magnetic field of solenoid is given as
so here when wire is coiled up on a nail then due to the magnetic field of the coil the nail will attain magnetic characteristic.
so correct answer will be
<em>Possess magnetic properties </em>
Answer:
The angle from the vertical is 48.72°
Explanation:
Given :
Length of rope m
Mass of man Kg
Mass of car Kg
Velocity of car
According to conservation law,
Potential energy of man is converted to kinetic energy of car moving,
We calculate height,
( ∵
)
m
This is the distance of the rope at the bottom,
So we take difference of it.
⇒
We can calculate angle between them,
48.72°
Therefore, the angle from the vertical is 48.72°
Answer:
Effective temperature, Doppler velocity
Explanation:
Since star behave localy as a blackbody, Wíen's displacement law can be use in order to determine its effective temperature. From the spectrum it will be take the wavelength at which is the peak of emission greater in the continuum
Then, the maximum peak of emission () will be replace in the next equation of the Wien's displacement law:
(1)
Where T is the effective temperature of the star.
Spectral lines will be shifted to the blue part of the spectrum if the source of the observed light is moving toward the observer, or to the red part of the spectrum when is moving away from the observer (that is known as the Doppler effect).
By using that shift in the spectral lines it can be determine the Doppler velocity.
(2)
Where is the wavelength shift,
is the wavelength at rest, v is the velocity of the source and c is the speed of light.