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NemiM [27]
3 years ago
11

The picture below shows the position of Earth and two stars.

Physics
2 answers:
alexgriva [62]3 years ago
8 0

The answer is:

18 years.

The explanation:

when Star 1 is 34 light years from Earth and Star 2 is 52 light years from Earth. that means the distance between star 1 and star 2 is 52-34 = 18 years so, If Star 2 explodes as a supernova so,  the explosion would take 18 years to be seen from a planet orbiting Star 1.


abruzzese [7]3 years ago
3 0
The picture below shows the position of Earth and two stars.Star 1 is 34 light years from Earth and Star 2 is 52 light years from Earth. If Star 2 explodes as a supernova, I believe that A. 18 light years would pass before the explosion is seen from a planet orbiting Star 1.
But I am not sure, sorry. :/
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A shell is fired at an angle of 35° above the horizontal at a velocity of 40 m/s. (a) What is it's speed at the highest point of
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Answer:

Part a)

v_f = v_x = 32.77 m/s

Part b)

T = 4.68 s

Explanation:

Part a)

Shell is fired at speed of 40 m/s at angle of 35 degree

so here we have

v_x = 40 cos35 = 32.77 m/s

v_y = 40 sin35 = 22.94 m/s

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Part b)

After completing the motion we know that the displacement of the object will be zero in Y direction

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7 0
3 years ago
A bullet is shot horizontally from shoulder height (1.5 m) with an initial speed 200 m/s. (a) How much time elapses before the b
daser333 [38]

Answer:

<h2>a) Time elapsed before the bullet hits the ground is 0.553 seconds.</h2><h2>b) The bullet travels horizontally 110.6 m</h2>

Explanation:

a)  Consider the vertical motion of bullet

We have equation of motion s = ut + 0.5 at²

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        Displacement, s = 1.5 m      

     Substituting

                      s = ut + 0.5 at²

                      1.5 = 0 x t + 0.5 x 9.81 xt²

                      t = 0.553 s

      Time elapsed before the bullet hits the ground is 0.553 seconds.

b) Consider the horizontal motion of bullet

We have equation of motion s = ut + 0.5 at²

        Initial velocity, u = 200 m/s

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        Time, t = 0.553 s      

     Substituting

                      s = ut + 0.5 at²

                      s = 200 x 0.553 + 0.5 x 0 x 0.553²

                      s = 110.6 m

      The bullet travels horizontally 110.6 m

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