Scientists observe an approaching asteroid that is on a collision course with Earth. They devise a plan to launch a rocket that will collide with the asteroid
inelastically and stop it. The mass of the asteroid is 7500 kg, and it is
approaching Earth at 85 m/s. If the rocket has a mass of 900 kg,
approximately what velocity must it have to completely stop the asteroid after
collision?
A. 151 m/s
B-305 m/s
C. -708 m/s
D. 68 m/s

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m

the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome