Dr. Joseph is testing whether bloodhounds are able to smell people wearing specially designed, airtight bodysuits. In his experiment, a man wearing such a bodysuit hides in a forest, and a bloodhound tries to trail his scent. Dr. Joseph walks along with the bloodhound and monitors its progress. For the results of the experiment to be useful, which of the following should Dr. Joseph do? A. He should give the man in the bodysuit a compass, so that he can find his way out of the forest. B. He should make certain that he does not know the location of the man in the bodysuit. C. He should give the bloodhound food and water every 30 minutes. D. He should make certain that the man in the bodysuit gets lost in the forest.

can you attach a picture of the lettuce? : )

explanation:

0.07 g/cm³

1.37 g/cm³

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied

answerca air mass;