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Question: You are going to go across the Mississippi river from East to West bank by rowing your kayak. You know you can row 3 m/s in still water. You discovered that river flows with a water speed of 2 m/s from North to South.
Part A: What direction should you aim at in order to go across the river in the shortest time?
Rework your solution for above question from the starting and check each step carefully.
A 25 ohm resistor at steady state draws a current of 10 amperes. Its temperature is 310 K; the temperature of the surroundings is 300 K.. what is the total rate of entropy generation?
a skateboarder starting from rest rolls down a 15.0 m ramp. when she arrives at the bottom of the ramp her speed is
Two identical guitar strings are prepared such that they have the same length (1.91 m) and are under the same amount of tension. What is the wave propagation speed on the guitar strings
A two-stage rocket moves in space at a constant velocity of +4940 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1000-kg upper stage is +5930 m/s.
A 340kg wooden raft floats on a lake. When a 65kg man stands on the raft, it sinks 3.0cm deeper into the water. When he steps off, What is the total energy of vibration
A body of mass M is at rest. It suddenly explodes into three pieces. One mass is .25M, moves due east at 12m/s. Find the velocity of the remianing piece
A 0.55 kg air cart is attached to a spring and allowed to oscillate. You are given the displacement of the air cart from equilibrium to be x = (19.7 cm) cos[(2.64 s-1)t + ?]. Find the maximum kinetic energy of the cart
A 3.87 kg mass experiences a gravitational force of 14.7 N at a certain point in space. What is the magnitude of the gravitational field at that point
A bolt comes loose from underneath an elevator that is moving upward at a speed of 4.5 m/s. How high up was the elevator when the bolt came loose
A van of mass 1420 kilogram traveling at 20 m/s is at the foot of a hill that rises 120 meter in 2 kilometer. Calculate the average power delivered by the van engine
a boat is traveling upstream at 19 kmh with respect to the water of a river. the water is flowing at 7.0 kmh with
When viewed by an observer on the Earth, light from a distant galaxy is Doppler shifted to the red such that the ratio of then shifted frequency to the observed frequency is 2.6. What is the galaxy's speed relative to the Earth?
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