Superman, with a mass of 150-Kg, goes into outer space to push a 125000-Kg alien spaceship out of stationary orbit. He uses his super strength and pushes the ship away at a speed of 150-m/s. What is the speed of Superman after his big push

125000 m/s.

Explanation:

The superman is pushing the spaceship in universe and we know there is absence of air or other interfering forces so in this case the total momentum will be conserved.

So, we can write

Where,

= mass of spaceship

= speed of spaceship

= mass of superman

= speed of superman

Now, putting the values given in the question in the above equation,

150 × 125000 = 150 ×

Solving for we get,

= 125000 m/s

Thus the speed of superman after pushing the spaceship will be 125000 m/s.

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

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