You spray your sister with water from a garden hose. The water is supplied to the hose at a rate of 0.111 liters per second and the diameter of the nozzle you hold is 5.79 mm. At what speed does the water exit the nozzle?

Which is true about elastic collisions:

An electric model train travels at 31.50 cm/s around a circular track of radius 1.670 m.  How many revolutions does it perform in one second?  How many radians per second is this?

A fluid, with a density of ρ = 1165 kg/m3, flows in a horizontal pipe. In one segment of the pipe the flow speed is v1 = 4.53 m/s. In a second segment the flow speed is v2 = 1.77 m/s. What is the difference between the pressure in the second segment (P2) and the pressure in the first segment (P1)?

Osmotic back pressure can be found by:

A squirrel runs along an overhead telephone wire that stretches from the top of one pole to the next. The creature is initially at position xi = 2.91 m, as measured from the center of the wire segment. It then undergoes a displacement of Δx = -5.61 m. What is the squirrel\’s final position xf?

A horizontal pipe carries a smoothly flowing liquid with density 1.25 × 103 kg/m3. At locations 1 and 2 along the pipe the diameters are 6.63 cm and 2.51 cm, respectively. Is the flow speed at location 2 higher or lower than at location 1?

Dr. Evil and his henchmen intend to deflect the Moon from its orbit around Earth by pulling it with a force of 3130 N. They plan to accomplish this by placing a mini black hole 6.17 x 106 m from the center of the Moon and letting gravitation do what gravitation does. What must the mass of the mini black hole be for the evil scheme to succeed? The mass of the Moon is 7.36 × 1022kg.  G = 6.673 x 10-11 N m2/kg2

A fox locates its prey under the snow by slight sounds rodents make. The fox then leaps straight into the air, and then burrows its nose into the snow to catch its meal. If a fox jumps up to a height of 91 cm, calculate the speed at which the fox leaves the snow, and how long the fox is in the air. Ignore air resistance.

The cell membranes are composed of proteins and nucleic acids.