Consider a modified falling cylinder viscometer where the outer tube is open at both ends and immersed within a large body of the same fluid. Since the bottom is open, the displaced fluid does not have to move counter to the falling cylinder, and there is no pressure other than hydrostatic. Obtain an equation for the viscosity of the fluid.

What happens to the light rays when they hit the specimen?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative