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A boat crosses a river of width 96.3m in which the current has a uniform speed of 1.82 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 1.87 m/s relative to the water. What is the magnitude of the speed of the boat relative to a stationary shore observer?
Answer in units of m/s.
two point charges of the same magnitude but opposite signs are fixed to either end of the base of an isosceles
A student standing on the ground throws a ball straight up. How long is the ball in the air before it hits the ground
A 45.7-cm diameter disk rotates with a constant angular acceleration of 3.0 rad/s2. Find the linear velocity and tangential acceleration of P at t = 2.30 s
A circuit consists of a 135 ? resistor in series with a 38.5 mH inductor and a 50.0 V ac generator. What is the frequency of the generator
we have a tuning fork with a frequency f resonating in a cavity with an open top of width 2.54cm and a length of 20.4cm at 20 degrees celsius and one atm
A mass of 12.2 kg is attached to a string which is wrapped around a cylindral spool of radius 10 cm and moment of inertia 4.00 kg* m square.
A 40g block of ice is cooled to -78 deg celcius and is then added to 560g of water in an 80g copper calorimeter at a temperature of 25 degrees celcius, determine how much ice is left
An electron with the initial speed of 4.00×10^5 is brought to rest by an electric field. What was the initial kinetic energy of electron, in electron volts.
Two people start at the same place and walk around a circular lakein opposite directions. How long will it be before they meet
An unmarked police car traveling a constant 95 is passed by a speeder traveling 115 . Precisely 1.00 after the speeder passes, how much time passes before the police car overtakes the speeder
A rectangular block of wood, 10 cm*15 cm*40 cm, has a specific gravity of 0.6. What fraction of the block is submerged
A metal rod with a diameter of 2.30 cm and length of 1.10 m has one end immersed in ice at 32oF and the other end in water at 212oF. what is the thermal conductivity of this metal
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