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A duck is swimming down a river and passes a slow moving log. If the duck is moving 2.50 times faster than the log, but the log has 3.75 times the kinetic energy of the duck, what is the ratio of the log\'s mass to the duck\'s mass?
If the log had a mass of 35.2 kg, and the duck was swimming at 3.00 m/s, what is the log\'s kinetic energy? Be sure to include units.
A jet airliner, moving initially at 330 mi/h to the east, suddenly enters a region where the wind is blowing at 100 mi/h toward the direction 30.0° north of east
When a guitar string is sounded along with a 436 Hz tuning fork, a beat frequency of 5Hz is heard. When the same string is sounded along with a 434 Hz tuning fork, beat frequency is 7.00 Hz. What is the frequency of the string.
A 2.00 kg frictionless block is attached to an ideal spring with force constant 314 n/m. Initially the block has a velocity of -3.77 m/s, Find the maximum force the spring exerts on the block
110 grams of boiling water (temperature 100° C, heat capacity 4.20 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 24° C (the heat capacity of aluminum is 0.9 J/gram/K).
A ball of mass 0.40 kg moving at 180 m/s east strikes a second ball, initially at rest of mass 0.500 kg. What is the final velocity of the second ball
Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5m/s, What amount of mechanical energy is lost
For 140 keV gamma rays, the mass attenuation coefficients for hydrogen and oxygen are 0.26 and 0.14 cm^2/g, respectively. What is the mean free path in water at this energy
Rahm was coasting on interstate highway I-35 from Wichita to Kansas City at 65 mph. How far from the accident does he come to a stop
At the instant before a particle collision at the Belle Experiment, an electron is moving north with a total energy of 8 GeV, find the speed of the electron as seen by the positron
When a certain air-?lled parallel-plate capacitor is connected across a battery, it acqquires a charge (on each plate) of magnitude 131 µC. What is the dielectric constant of the slab
A massless spring of force constant 19 N/m hangs vertically. A body of mass 0.20-kg is attached to its free end and then released. find the amplitude of the resulting motion
A 1.18 m long sample from a roll of string is measured to have a mass of 1.04 g. find the wavelength of traveling waves on this string which have frequencies of 40.0 Hz and 5.00 Hz
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