Water is being fired at 20 m/s from a hose of 80 mm diameter into the atmosphere. The water leaves the hose through a nozzle with a diameter of 25 mm at its exit.
Using the combination of continuity, momentum and Bernoulli's equations, find
the pressure just upstream of the nozzle and the force on the nozzle. [10 marks]
1
2
Data: 01 = unknown; d = 0.08m; U2 = 20 m/s; d2 = 0.025m.
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Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

Marcella is a four-year-old girl who is a victim of emotional child abuse. based on the child and family services improvement and innovation act of 2011, which action should the government take for marcella? a. the state should arrest marcella’s abuser. b. the state should find a home for marcella as soon as possible. c. the state should enforce stricter laws in the area where marcella resides. d. the state should provide medical assistance to marcella.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?