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A bird watcher meanders through the woods, walking 1.62 km due east, 1.63 km due south, and 4.16 km in a direction 26.7 °north of west. The time needed for this trip is 2.308 h. Decide the magnitudes of the bird watcher's (a) average velocity and (b) displacement.
the spin cycles of a washing machine have two angular speeds 423 revmin and 640 rev min. the internal diameter of the
how many 40w 60lmw flourescent lamps would be needed to provide an illuminance of 250lmm2 on a factory floor of an
three electrons are located at the vertices of an equilateral triangle, one at each vertex. what is the magnitude of the net electrostatic force on each electron
An elevator has a downward acceleration of 1 m/s2. A person, having a weight of 800 N as measured by a scale at rest on the ground, steps on a scale in the elevator. What does the scale read? A) 0 N. B) Approximately 80 N. C) Between 80 N and 800 ..
the rotational inertia of a uniform rod of length l and mass m about its center is ml212. what is the rotational
A thin rod has a length of .25 m and rotates in a circle on a frictionless tabletop. The axis is perpendicular to the length of the rod at one of its ends. What is the angular momentum of the rod before the bug started crawling
An archaeologist uses carbon dating to find the age of some ancient fossils. Determine the fossil age
A 45.0 kg girl is standing on a 162 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
During a Carnot cycle, in the first process, an ideal gas is expanded isothermally at 500 K. 1,000 J of heat enters the system, What is the magnitude of Q that leaves the system
while driving on a freeway at 110 kmh you pass a truck whose total length you estimate at 25m. a if it takes you in the
It is important for the body to have mechanisms to effectively cool itself; if not, moderate exercise could easily increase body temperatures to dangerous levels. by how much would his body temperature rise during this exercise
The wire in the drawing carries a current of 10 A. Suppose thata second long, straight wire is placed right next to this wire. Thecurrent in the second wire is 32
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