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vovangra [49]
3 years ago
6

Why is traveling between the stars (by creatures like us) difficult?

Physics
1 answer:
mariarad [96]3 years ago
4 0

Answer:

Stars are at large distances that even light takes thousands of years to reach us from there.

for example, alpha centauri is 4300 light years away from earth and it is considered the nearest star to us, this means that light from there takes 4300 years to reach us and with a spaceships that can move with the speed of light is would take us 4300 years to get there which is imposible to live for that long.

hence, it is difficult to move between the stars.

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Is this true or false ethics deals with morals and values and can be measured and tested using the scientific method.
sammy [17]

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3 years ago
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Julia can swim at 3.5 km/h in still water. She attempts to head straight north
raketka [301]

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Q¹=0,07Mc Q²=2C r=1,08 cm F=.......?
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The force (F) of attraction or repulsion between two point charges (Q1 and Q2) is given by the following rule:
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</span>q1 and q2 are the charges
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</span>r is the distance between the two charges.

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3 years ago
The magnetic field over a certain range is given by B~ = Bx ˆı + By ˆ, where Bx = 2 T and By = 4 T. An electron moves into the
krek1111 [17]

Answer:

Explanation:

The force exerted in a magnetic field is given as

F = q (v × B)

Where

F is the force entered

q is the charge

v is the velocity

B is the magnetic field

Given that,

The magnetic field is

B = 2•i + 4•j. T

The velocity of the electron is

v = 2•i + 6•j + 8•k. m/s

Also, the charge of an electron is

q = -1.602 × 10^-19 C.

Then note that,

V×B is the cross product of the speed and the magnetic field

Then,

F = q (V×B)

F = -1.602 × 10^-19( 2•i + 4•j +8•k × 2•i + 4•j)

Note

i×i=j×j×k×k=0

i×j=k. j×i=-k

j×k=i. k×j=-i

k×i=j. i×k=-j

F = -1.602 × 10^-19[(2•i + 4•j +8•k) × (2•i + 4•j)]

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F = -1.602 × 10^-19(16•j - 32•i)

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Also, the y component of the force is

Fy = -2.563 × 10^-18 N

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