An air bubble has a volume of 1.50 cm3 when it is released by a submarine 115 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume that the temperature and the number of air molecules in the bubble remains constant during its ascent.
I'm guessing...
The pulmonary artery, which connects the heart to the lungs, has an inner radius of 2.8 mm and is 8.5 cm long. If the pressure drop between the heart and lungs is 400 Pa, what is the average speed of blood in the pulmonary artery?
I am using the equation pi*r^4(p1-p2)/(8*viscosity*length)...
A juggler throws two balls to the same height so that one is at the halfway point going up when the other is at the halfway point coming down. At that point:
Their accelerations are equal but their velocities are equal and opposite.
Right?
How much work is done by a person lifting a 2.0kg object from the bottom of a well at a constant speed of 2.0 m/s for 5.0s?
I know w=fd. I found the distance to be 10m. But what is the force? F=ma so what is the acceleration of the system?
A ball is thrown vertically upward. Consider the following quantities: 1)speed, 2)velocity and 3) acceleration. Which of these will be zero when the ball has reached the maximum height?
Won't all three be zero?
A very powerful vacuum cleaner has a hose 2.75 cm in diameter. With no nozzle on the hose, what is the weight of the heaviest brick that the cleaner can lift?
So I need to find the pressure and then multiply by the area of the hose... but if P= density*g*h... would I use the density for air...