Suppose we have a spaceship about the size of a typical ocean cruise ship today, which means it has a mass of about 150 million kilograms, and we want to accelerate the ship to a speed of 12 % of the speed of light.
part a
how much energy would be required? (hint: you can find the answer simply by calculating the kinetic energy of the ship when it reaches its cruising speed; because 12 % of the speed of light is still small compared to the speed of light, you can use the formula that tell us that kinetic energy = 12mv2.)
express your answer using two significant figures.

part b
how does your answer compare to total world energy use at present, which is about 5×1022 joules per year?
possible
1) espaceship/eworldenergyuse~1
2) espaceship/eworldenergyuse~105
3) espaceship/eworldenergyuse~1020
part c
the typical cost of energy today is roughly 5¢ per 1 million joules. using this price, how much would it cost to generate the energy needed by this spaceship?
express your answer using two significant figures.