⦁ Indiquer si les phrases suivantes sont justes ou fausses et corriger ces dernières : ⦁ On trouve des dorsales océaniques au niveau des zones de rapprochement des plaques :

⦁ Les limites des plaques ne coïncident pas toujours avec celles d’un continent :…………………………………………………………………………………………

………..……………………………………………………………………………… …………………

⦁ La subduction correspond à la rencontre de deux plaques continentales :……………………………………………………………………………………

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience.b. report the adverse drug experience to the irb only if there are several other occurrences.c. report the adverse drug experience as part of the continuing review report.d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.