A bubble of air has a volume of 2.0 cm at the bottom of a lake where the total pressure is 4.0 x 10Pa. The temperature of the water in the lake is constant. The atmospheric pressure at
the surface is 1.0 x 10Pa.
What is the volume of the bubble when it rises to the surface?

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.

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A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?