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A cargo plane has to drop a relief package to people in need. The plane is flying level (vertical velocity = 0) at 200 ft.The plane is traveling at a horizontal velocity of 240 ft/s in a straight line toward the drop target. The wind resistance on the package can be neglected. When releasing the package, at what angle? (in degrees)down from the horizontal must the pilot see the target for the package to land on the target?
When a high-power laser is used in the Earth's atmosphere, the electric field associated with the laser beam can ionize the air, turning it into a conducting plasma that reflects the laser light.
Steam enters an isentropic turbine at an initial condition of 3.5 MPa and 400°C and leaves at a pressure of 175 kPa. Determine the work produced by this turbine
To determine the location of her center of mass, a physics student lies on a lightweight plank supported by two scales 2.50m apart, find the distance from the student's head to her center of mass
A tire 0.300 m in radius rotates at a constant rate of 210 rev/min. What is the acceleration of the stone
A coil has 345 turns and self-inductance 3.60 mH. The current in the coil varies with time according to i = (680 mA) cos(?t/0.0250 s)
A quantity of air initially at 1 bar, 300K, undergoes two types of interactions: (a) it is brought to a final temparture of 500K adiabatically by a paddle-wheel work transfer, (b) the same temperature rise is brought about by heat transfer from a ..
A body of mass 6 kg is acted upon by a force which causes a displacement in it given by x = t2/4 metre where t is the time in seconds
A diver makes 2.5 revolutions on the way from a 11-m-high platform to the water. find the diver's average angular velocity during a dive
One simple model for a person running the 100{\rm m} dash is to assume the sprinter runs with constant acceleration until reaching top speed, what will be his total time
The focal length of the human eye is approximately 1.7 cm. What is the f-number for the human eye in bright light, when the pupil diameter is 3.0mm
What is the energy range (in joules) of photons of wavelength 400nm to 760nm
The filament in a light bulb has a resistance of 10?. If the filament has a cross sectional area of 3.0×10-6 m2 and the length of the filament is 5mm. Find the resistivity of the filament
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