Scientists think that dolphins and whales may have evolved from a common ancestor. Fossils have been found showing how this organism slowing evolved into the seperate organism. These fossils are know as A.
Index Fossil

B.
Dervied Fossil

C.
Avada kedarva Fossil

D.
Transitional Fossil

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

Ajoint produces movement when its angle decreases. which type of movement is it?