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Squids and octopuses propel themselves by expelling water. They do this by taking the water into a cavity and then suddenly contracting the cavity, forcing the water to shoot out of an opening. A 6.40 kg squid (including the water in its cavity) that is at rest suddenly sees a dangerous predator.
Part 1: If this squid has 1.90 kg of water in its cavity, at what speed must it expel the water to suddenly achieve a speed of 2.65 m/s to escape the predator? Neglect any drag effects of the surrounding water.
Part 2: How much kinetic energy does the squid create for this escape maneuver?
With the assumption that the air temperature is a uniform 0.0 , what is the density of the air at an altitude of 4.00 as a percentage of the density at the surface
A beam of laser light with a wavelenth of ? = 690.00 nm passes through a circular aperture of diameter a = 0.133 mm. What is the angular width of the central diffraction maximum
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 7.8x10-7 m and a maximum speed of 2.7x10-3 m/s. What is the maximum acceleration of the eardrum
Drag racing combines the reflexes of the driver with a powerful engine to propel a specially designed car across a quarter mile as quickly as possible. What is the time for the car to go the quarter-mile
While you are sitting on a chair at the edge of a 1.8 m deep swimming pool, your eyes are 1.7 m above the surface of the water. What is the horizontal distance between you and the acorn?
A tube 1.16 m long is closed at one end. A stretched wire is placed near the open end. The wire is 0.355 m long and has a mass of 8.80 g. Find the tension in the wire
A ball of mass 0.220 kg that is moving with a speed of 6.3 m/s collides head-on and elastically with another ball initially at rest. Calculate the mass of the target ball
In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year
A brick hangs from a string attached to the ceiling. When a horizontal force of 15 N is applied to the brick, What is the mass of the brick
What is the difference between mass and weight? On earth, what is the weight of a 1 kg mass?
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.50×106\rm N , one at an angle 10.0 degrees west of north, What is the total work done by the two tugboats on the supertanker
In a television tube, electrons travel down the tube and strike the fluorescent material at the end of the tube. What is the acceleration of an electron during this process
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