Bumper cars A and B undergo a collision during which the momentum of the combined system is conserved.

Which equation(s) correctly states the principle of conservation of momentum?

1. P⃗ A, i+P⃗ B, i=P⃗ A, f+P⃗ B, f

2. P⃗ A, i+P⃗ A, f=P⃗ B, i+P⃗ B, f
3. ΔP⃗ A=ΔP⃗ B
4. ΔP⃗ A+ΔP⃗ B=0

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?

Nthe 19th century, women were expected to conform to a certain role that entailed a. gaining domestic skills and establishing a career b. going to college and getting married c. getting married and having children d. graduating from college and being a housewife