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A boat, whose speed in still water is 1.70 m/s, must cross a 260m wide river and arrive at a point 110m upstream form where it starts. to do so, the pilot must head the boat at a 45 degree upstream angle. What is the speed of the river's current?
When a diver jumps into a lake, water leaks into the gap region between the diver's skin and her wetsuit, Estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
Two loudspeakers emit 500Hz notes. One speaker sits on the ground. The other speaker is in the back of a pickup truck, What is the truck's speed
A rod 50 cm long and 1.0 cm in radius carries a 2.0 microC charge distributed uniformly over its length. Find the approximate magnitude of the electric field
convert 25mus into ams bmihthe kinetic energy of a car of mass m moving with velocity vis emv22. if m1000kg and v6ms
A square loop of side a centered at the origin in the xy plane carries current counter clockwise as view from above (from positions with z > 0). What is the net force and net torque on the loop
A 275 kg piano slides 4.4 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40. a)Calculate the force exerted by the man. b..
The average lifetime of a pi meson in its own frame of reference (i.e., the proper lifetime) is 2.6 10-8 s. What is the average distance it travels before decaying
With what minimum speed must you toss a 160 g ball straight up to hit the 10 m high roof of the gymnasium if you release the ball 1.60m above the ground? Solve this problem using energy.
A patient swallows a radiopharmaceutical tagged with phosphorus-32 (3215P), a ? - emitter with a half-life of 14.3 days. What is the total energy deposited in the body during the 5.5 days
a 210-kg projectile fired with a speed of 142 ms at a 69.0 degrees angle breaks into three pieces of equal mass at the
A block of mass m1 = 3 kg rests on a table with which it has a coefficient of friction µ = 0.67. A string attached to the block passes over a pulley to a block of mass m3 = 5 kg. The pulley is a uniform disk of mass m2 = 0.7 kg and radius 15 cm. A..
An air-filled pipe is found to have successive harmonics at 1050Hz , 1350Hz , and 1650Hz, It is an open-closed pipe, so What is the length of the pipe
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