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A plane is flying with an airspeed of 266 miles per hour with heading 272.7 deg the wind currents are running at a constant 45.7 miles per hour in the direction 238.6 deg. Find the ground speed and true course of the plane, v= mi/hr at deg from due north.
A 747 airliner reaches its takeoff speed of 187 mi/h in 31.4s. What is the magnitude of its average acceleration.
A hydrogen atom in its ground state is excited to the n = 5 level. It then makes a transition directly to the n = 2 level before returning to the ground state. What are the wavelengths of the emitted photons
A previous nuclear accident occurred where a worker received 100J/Kg of gamma radiation. Estimate the dose in rem of the worker
A copper telephone wire has essentially no sag between poles 20.5 meters apart on a winter day while the temperature is -15.5° C. How much longer is the wire on the summer day when the temperature is 27.0° C.
When the tips of the rotating propeller of an airplane have a linear speed greater than the speed of sound, the propeller makes a lot of noise, which is undesirable. If the length of the propeller is 2.354 m
A truck travels 1690 m uphill along a road that makes a constant angle of 4.82? with the horizontal. Find the magnitude of the truck's vertical component of displacement
A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, What is the initial kinetic energy of the car
One solenoid is centered inside another. The outer one has a length of 54.0 cm and contains 6800 coils, What is the mutual inductance of these solenoids
Two metal rods of equal length-one aluminum, the other stainless steel-are connected in parallel with a temperature of 24.0?C at one end, by what factor does the rate of heat flow change
Assume the volume of the tank and the temperature of gas remain constant all through this operation.
A three level laser has energy levels E 1=1.50 eV, E 2=3.50 eV, and E 3=5.50 eV. Level E 2 is the metastable state. What is the lasing wavelength
A 4.5-kg, three legged stool supports a 68-kg person. If each leg of the stool has a cross-sectional diameter of 3.0 cm, determine the pressure exerted on the floor by each leg
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