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A dog wishes to swim across a slow moving stream. the dog can swim at 2.0m/s in calm water. the current velocity is 3.0m/s. the distance across the stream is 50m wide.
a. if the dog points himself directly accross the stream, how long will it take to get across it?
b. how far downstream will the current have carried the dog when the dog gets to the other side?
c. what was the dogs velocity relative to the bank from where the dog started?
A jet aircraft is flying at constant altitude. At t1 = 0 it has components of velocity vx = 150 m/s and vy = 130 m/s, What is the acceleration's magnitude and direction during this time interval
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question1water has a specific heat capacity of 4186 jkg degc. a tank contains 500 kg of water at 10.0degc. the water is
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The leg and cast weigh 290 -N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w2 weighs 120 N. Determine the weight w1 and angle α needed in order that there is no force exerted on the hip joint by the le..
A transverse pulse moves along a stretched cord of length 5.29 m having a mass of 0.180 kg. If the tension in the cord is 13.4 N, find the following. (a) The wave speed. (b) The time it takes the pulse to travel the length of the cord.
A tuning fork generates sound waves from a frequency of 246 Hz. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The hallway is 47.0m long and the tuning fork is located 14.0 m from one end.
You push with a horizontal force of 50.0N against a 24.0N box, pressing it against a rough wall to hold it in place. what is the friction force of the box
Suppose you need to image the structure of a virus with a diameter of 50 nm, For light of wavelength 2.5nm, what is the energy (in eV) of a single photon? In what part of the electromagnetic spectrum is this
A wheel rotates without friction about a stationary horizontal axis at the center of the wheel. What is the moment of inertia of the wheel
A round flywheel is going 35 rad/s and the moment of inertia is25 kg-m2. It merges with an oval flywheel with inertiaof 15 kg-m2 and velocity of 12 rad/s in the opposite direction. What is the final angular velocity?
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