Stretching out of wavelengths is knows as Redshift
The correct option is this: SHE SHOULD TRY THE EXPERIMENT WITH A POTTED PLANT WITH ROOTS AND OBSERVE ANY COLOR CHANGE.
After the formulation of hypothesis, the next thing to do is to carry out an experiment which is designed to test out the observation that was made. The next thing for Maria to do is to carry out an experiment to confirm her hypothesis.
Answer:
It will become less negative
Explanation:
When a train moves in a direction with decreasing velocity , then it is for sure than acceleration is also decreasing. With stowaways in between before 1 KM of completion of the journey will bring the vehicle in a situation where it will have negative acceleration. Now it is given that force remains same , then with constant mass it is the acceleration which has to increase in order to justify the equation
Since the acceleration was already negative, an increase in acceleration will make it less negative