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Huck Finn walks at a speed of 0.60 m/s across his raft (that is, he walks perpendicular to the raft's motion relative to the shore). The raft is traveling down the Mississippi River at a speed of 1.50 m/s relative to the river bank. What is Huck's velocity (speed and direction) relative to the river bank? (in m/s and degrees) (counterclockwise from direction of river current).
What must the banking angle of the curves be so that the force of the pavement on the tires of the car is in the normal direction.
A woman on a bridge 104 m high sees a raft floating at a constant speed on the river below, She drops a stone from rest in an attempt to hit the raft, Find the speed of the raft
An airplane flies between two points on the ground that are 500 km apart. The destination is directly north of the origination of the flight. The plane flies with an air speed of 120 m/s.
A polar bear of mass 436 kg stands on an ice floe 58.10 cm thick. What is the minimum area of floe that will just support the bear in saltwater of density of 1030 kg/m3? The specific gravity of ice is 0.88.
A uniform magnetic field is 30 degree to the plane of a circular loop 10 cm in diameter made of copper wire (diameter 2.5 mm). At what rate must the magnetic field change with the time
An airplane travels at speed of 125 m/s in calm air. The plane wants to undergo a change of displacement delta x= 183 km i. How lond will it take the plane to reach its destination
The tip of a tuning fork goes through 480 complete vibrations in a time of 0.570s. Find the angular frequency. Find the period of the motion.
A square loop of wire with sides of length l=0.15m is pulled horizontally to the right at a constant speed of 5.0m/s into a perpendicular magnetic field of strength B=0.37T directed into the page
A 94.00 water skier floating in a lake is pulled from rest to a speed of 10 in a distance of 24. What is the net force exerted on the skier, assuming his acceleration is constant.
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 46 dB by an observer 10 km away. What is the average power generated by the horn
Once the station is completed, it is set rotating at a rate that requires an object at the rim to have radial acceleration, thereby simulating Earth's surface gravity. This is accomplished using two small rockets, each with 130 thrust that are mounte..
A 282 kg log is pulled up a ramp by means of the rope that is parallel to the surface of the ramp. The ramp is inclined at 23.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.87, and the log has..
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