Answer:
B. 500 years
Explanation:
The light coming from the star and reaching us on the Earth travels with uniform motion (with constant velocity), so we can use the equation of uniform motion which relates distance covered, speed and time taken:
where
v is the speed
d is the distance covered
t is the time taken
In this problem:
is the speed at which light travels
is the distance that light has to cover from the star to the Earth
Therefore, by rearranging the equation, we can find the time:
And by converting into years, this time is
So, approximately 500 years: this means that the image we see of the star is 500 years old.
Answer:
Explanation:
According to Wein's displacement law
Where b = 2.898 x 10⁻³ m K
Given ,
T = 161 X 10³ K.
B. Wrap more coils of wire around the nail
Increasing the number of coils in an electromagnet increases the strength of the magnetic field.
A developing story hope it helped
Answer:
it cools down the cancer cells
Explanation:
The cancer cells are rapidly reproducing and when you cool it down it slows down the mutation/ reproduction process.
