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Calculate the resultant velocity of an airplane that normallyflies at 200 km/hr if it encounters a 50 km/hr tailwind. If itencounters a 50 km/hr head wind.
A spaceship travels at constant velocity from Earth to a point 780 ly away as measured in Earth's rest frame, How old is the passenger when the ship reaches its destination, as measured by the ship's clock
A resting bat sends out ultrasonic waves at 50 kHz towards an insect that is approaching the bat with a speed of 20.0 m/s. What is the frequency of waves heard by the insect
A cart 4.9 m in length moving with a velocity of 4.9 m/sec is approaching a platform which is 9.8 m above the plane of the cart's motion. how many meters before the front of the cart arrives
The 95 mu F capacitor in a defibrillator unit supplies an average of 6500 W of power to the chest of the patient during a discharge lasting 5.0 ms
a ball is attached to a center post by a string that is 0.378 m long. the ball is moving in a circle on a frictionless
A box of sand, initially at rest, is to be pulled across a floor by means of a cable in which the tension cannot be allowed to exceed 1100N. What should be the angle between the cable and the box in order to pull the greatest mass of sand
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.46 km. What is the magnitude of the couple's displacement
The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.580 m and mass 4.89 kg, what should the radius of the disk be
A constant electric field E=100 N/C*i is present throughout a region of space that includes the plane bounded by the x, compute The electric flux at the plane's surface
A person of mass 79kg stands at the center of a rotating merry-go-round platform of radius 3.3m and moment of inertia 830kg*m^2. Calculate the angular velocity when the person reaches the edge
two hand-held radio transceivers with dipole antennas are separated by a large fixed distance. assuming a vertical
A 532 nm light wave in vacuum transmits into a glass plate of thickness 1.00 cm and index 1.60, at normal incidence. How many wavelengths span the glass
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