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a river flows from south to north at 5 Meter/minutes. A man on the West Bank of river is capable of swimming at 10 meter/Minutes in still water, wants to take shortest time . In what direction he should move?
when electrons move from the fourth energy level to the second energy level they emit visible light. explain why the
The distance between the eyepiece and the objective lens in a certain compound microscope is 21.5 cm. What is the overall magnification of the microscope
A 1792 kg safe is 3.01 m above a heavy-duty spring when the rope holding the safe breaks. What is the spring constant of the spring
When an 82.0 kilogram adult uses a spiral staircase to climb to the second floor of his house, Find by how much does the potential energy of a 20.0 kilogram boy increase when the boy climbs a normal staircase to the second floor
A totally absorbing detector of area A = 10 cm2 lies perpendicularly to the direction of propagation. How much energy is absorbed by the detector in one second?
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 12.0 m/s at an angle 47.0 degrees, obtain the maximum height the ball goes above the ground
A 54kg ice skater moving at 6.4m/s glides to a stop. Assumingthe ice is at 0deg C and that 50% of the heat generated by frictionis absorbed by the ice, how much ice melts
It is observed that a light ray travelling in X at angle of 50o to the normal is totally reflected at the X-water interface. What is the minimum index of refraction of X?
A 120-V motor has mechanical power output of 2.70 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A 500-g block is released from rest and slides down a frictionless track that begins 2.00 m above the horizontal, as shown in the figure below. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light s..
The magnetic field then begins to drop to zero strength with a constant rate of decrease. How long does it take for the field drop to zero in order for the emf induced int the loop to be a constant 1.75 volts?
Steel wire with mass 29 g and length 1.14 m is strung on a bass so that the distance from the nut to the bridge is 1.10 m. Compute the linear density of the string
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