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storchak [24]
3 years ago
14

The transverse motion of a star can be determined by studying its spectrum. TRUE or FALSE

Physics
1 answer:
Klio2033 [76]3 years ago
6 0
Nope.
False.
The shift in spectral lines reveals only 'radial' motion ...
motion toward us or away from us.  The spectrum
carries no information related to motion across the
line of sight.
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A plane electromagnetic wave travels northward. At one instant, its electric field has a magnitude of 3.7 V/m and points eastwar
UNO [17]

Answer:

Magnetic field, B = 1.24\times 10^{-8}\ T (eastwards)

Explanation:

Given that,

The magnitude of electric field, E = 3.7 V/m

A plane electromagnetic wave travels northward. We need to find the magnitude and direction of the magnetic field at this instant.

The relation between the magnetic field and the electric field of the plane electromagnetic wave is given by :

B=\dfrac{E}{c}

c is the speed of light

B=\dfrac{3.7}{3\times10^8}\\\\B=1.24\times 10^{-8}\ T

So, the magnetic field is 1.24\times 10^{-8}\ T. The direction of magnetic field is perpendicular to the electric field and the direction of wave propagation. Hence, the direction of magnetic field is eastward.

3 0
3 years ago
A body accelerates by 25m/s 2 when it applied by 40n forces.what would be acceleration if it is applied by 80n forces
il63 [147K]

Answer:

50m/s²

Explanation:

cross muliplyy write down the values acceleration and force

6 0
3 years ago
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juin [17]

Answer:

it's is because the heavier the object is the more it will be pulled down by gravity n the lighter the object the lesser the gravity will pull it down

5 0
2 years ago
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How do you calculate the net force when there are multiple forces in different directions?​
Artyom0805 [142]

To find F_{net} we need to use vector addition and use the x and y components. First we subtract vector 2 from vector 5 which results in a vector with a  length of 3 pointing directly east, then we use the distance formula to find the length of the net force F_{net} = \sqrt{(3)^2+(4)^2} \\  which gives F_{net} = 5. We now have a magnitude but we also need a direction, since vector 4 and vector 5 are perpendicular. Using \theta = \tan^{-1} (\frac{4}{3})   where tan^-1(y/x) we get an angle of 53 degrees. The resultant force vector is 5 distance with an angle of 53 degrees north east.

4 0
3 years ago
10. What is momentum of the water bottle before the collision? (read the
Alona [7]

Answer:

O ksm/s

Explanation:

before collision,

Velocity =0

So,momentum of the bottle before collision=mass ×velocity

=mass×0

=0 kgm/s

8 0
3 years ago
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