If one ball with a momentum of 50 kg·m/s hits a ball at rest and no other forces are acting on either ball, what's the total momentum of both balls after the collision?
a. 0 kg·m/s
b. 25 kg·m/s
c. 100 kg·m/s
d. 50 kg·m/s

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i