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A 1080 kilogram van pulls a 360 kilogram trailer. The van exerts a horizontal force of 3800 Newton against the ground in order to accelerate. Obtain what force does the van exert on the trailer? Suppose an effective friction coefficient of 0.20 for the trailer.
A member of an aircraft maintenance crew wears protective earplugsthat reduce the sound intensity by a factor of 380. When a jetaircraft is taking off, the sound intensity level experienced bythe crew member is 84 dB.
The same train ordinarily decelerates at a rate of 1.95 m/s2. How long does it take to come to a stop from its top speed
The distance to a star is approximately 4.50 x 1018 meter. If this star were to burn out today, in how many years would we see it disappear
Planets go around the sun in elliptical orbits. The extremely exaggerated diagram below shows a portion of such an orbit and the force on the planet at one position along that orbit. The planet is moving to the right. F|| and F are the components of ..
A 0.495-kg mass is attached to a horizontal spring with k = 105 N/m. The mass slides across a frictionless surface. Find the mechanical energy of the system
Consider a string of length 1.0 meter, fixed at both ends, with mass 100 grams and tension 100 Newtons. Give the number of nodes and antinodes set up on the string if it is driven at a frequency of 95 hertz. Be sure to include the ends of the string ..
an electric motor operating at 200 v draws a current of 5 a at its full speed. the resistance of the amature is 10 ohm.
A piece of metal weighs 54.5 N in air, 37.5 N in water, and 41.3 Nin unknown liquid. what is the density of the unknown liquid?answer in units of kg/m3.
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 3781 kg), which is made of steel (? = 7850 kg/m3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-p..
If air resistance & other effects are ignored how far away did the shell hit.
a astronomers on planet zog whose sun is 1.4 x 1011 m away measure their solar flux to be 1250 wm2. what is their suns
A cosmic-ray proton in interstellar space has an energy of 25.0 MeV, What is the magnetic field in that region of space
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