(part1)---Our hero is fired upon by the dastardly space villain whose space howi

Question

(part1)---Our hero is fired upon by the dastardly space villain whose space howitzer has a muzzle velocity of 0.44 c. Moreover, the space villain is speeding toward our hero at 0.79 c when she fires her evil weapon? How fast does our hero see the projectile rushing at him? Assume the positive direction is from our hero towards the dastardly space villain. Answer in units of c.

(part 2)---Our hero sees the weapon fired from a mere 0.74 Gm away. How long does he have to raise his deflector screens? (Remember, it also takes some time for the light to get to him, and the projectile is already on its way.) The speed of light is 3 × 108 m/s. Answer in units of s.

Explanation / Answer

Part 1 :- Relative speed = 0.79c + 0.44c = 1.23 c..........Ans.

Part 2: - Time = distance /speed = 0.74x10^12 m/ 1.23x3x10^8 =2005.42 sec..........Ans.

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