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A river has a steady speed of 0.500 m/s. A student swimsupstream a distance of 1.00 km and swims back to the startingpoint. If the student can swim at a speed of 1.20 m/s in stillwater, how long does the trip take? Compare this with the time thetrip would take if the water were still.
Find the radius of an electron's orbit when it moves perpendicular to a magnetic field of 0.56 with a speed of 6.29×10^5 m/s
questionthe michelson interferometer can be used to measure an index of refraction of a gas by placing the evacuated
A dentist's mirror is placed 2.3 cm from a tooth. The enlarged image is located 5.8 cm behind the mirror. How is the image oriented relative to the object
Two coils are close to each other. The first coil carries atime-varying current given by I(t) =(4.7 A)e^-0.023t sin(377t). What is the mutual inductance of the coils
What is the minimum speed in km/s , with which a metoer strikes the top of the earths stratosphere (about 14km above earths surface) assuming that the meteor being as a bit of interplanetary debris far from earth? Assume the drag force is neglible un..
Knowing the temperature at the surface of the Earth to be 72 F, find the temperature at the surface of Venus. ( show your work step by step.)
A block of mass m is at restlying on the face of an incline plane.Theplane makes an angle (theta) with the horizontal. Draw the free-body diagram showing all forces acting on theb lock.
The space shuttle is in a 200-mile-high orbit. What is the shuttle's orbital period
At time t=0 a grinding wheel has an angular velocity of 28.0 rad/sec. It has the constant angular acceleration of 35.0 rad/sec^2 until a circuit breaker trips at time t=1.80. From then on, the wheel turns through an angle of 433 as it coasts to the s..
A gymnast of mass 52.0kg hangs from a vertical rope attached to the ceiling, calculate the tension T in the rope if the gymnast hangs on the rope
A substance has a melting point of 20° C and a heat of fusion of 2.9 × 104 J/kg. The boiling point is 150° C and the heat of vaporization is 5.8 × 104 J/kg at a pressure of one atmosphere. The specific heats for the solid, liquid, and gaseous phases ..
A winch capable of pulling 250 lb must pull a 2800 lb load up a ramp of height 5.5 ft. Find the length of the shortest ramp for this job
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