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The ski boat's jet propulsive system draws water in at point A (at the middle of the bottom of the boat) and expels it at B (at back of boat) at 80ft/s relative to the boat. Assume that the water drawn in enters with no horizontal velocity relative to the surrounding water. The maximum mass flow rate of water through the engine is 2.5 slugs/s. Hydrodynamic drag exerts a force on the boat of magnitude 1.5v lb, where v is the boat's velocity in feet per second. Neglecting aerodynamic drag, what is the ski boat's maximum velocity?
Old naval ships fired 13 kg cannon balls from a 210 kg cannon. It was very important to stop the recoil of the cannon, since otherwise the heavy cannon would go careening across the deck of the ship.
Two identical pucks are on an air table. Puck A has an initial velocity of 4.0 m/s in the positive x-direction. What is the speed and direction of puck B after the collision
The burner on an electric stove has a power output of 20 kW. A 810g stainless steel tea kettle is filled with 20C water and placed on the already hot burner. If it takes 3.3min for the water to reach a boil, what volume of water, in cm3, was in the k..
Determine the biologically equivalent dose received by a patient from a chest Xray. The X-ray beam is turned on for 0.1 s, the intensity is 1W/m2, What biological effect is this radiation likely to have
How did Pavlov and Watson's focus on scientific inquiry of behaviours differ from earlier viewpoints of structuralisms, psychoanalysts, and functionalists.
A capacitor constructed of two metal plates which are 160 cm long and 4 cm wide. They are separated by a distance fo 0.2 mm, which is filled with an oil that has a dielectric constant (K) of 5.0
Two objects of masses m1=0.56 kg and m2=0.88 kg are placed on a horizontal frictionless surface and a compressed spring of spring constant k=280 N/m is placed between them. find the final velocity of each object
A grain of dust of mass 10-7 kg moving at a velocity of around 10 m/s. Find the intrinsic quantum mechanical uncertainty in the position of the dust
An 840 kg roller coaster is launched from a giant springof constant k = 31,000 N/m on a frictionless loop-the-loop track ofradius 6.2 m. Calculate the minimum compression of the spring
At what temperature is the speed of sound in helium (ideal gas, = 1.67, atomic mass = 4.003 u) the same as its speed in oxygen gas at 4.78 oC
The wing of an airplane has an average cross-sectional area of 13 m2 and experiences a lift force of 84,000 N. What is the average difference in the air pressure
Calculate the centripetal acceleration of a point 7.50cm from the axis of an ultracenteifuge spinning at 75000rpm. Determine the ratio of this acceleration to that of gravity for comparison's sake. Show work and formulas for credit.
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