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A wooden pole is 4.00m long , weighs 315 N , and has its centerof gravity 1.50m from one end. What force is needed to lift each end?
A horizontal 810-N merry-go-round of radius 1.30 m is started from rest by a constant horizontal force of 45 N applied tangentially to the merry-go-round
The cosmic background radiation permeating the universe has the spectrum of a 2.7 K thermal radiator. What is the peak wavelength
A 8.9 dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks along the length of the canoe at 0.54, relative to the water, and the canoe simultaneously moves in the opposite direction a..
an object having a mass of 8.0 g and a charge of 10.0 x 10-5 c is placed in a uniform electric field e where ex 2.00 x
A string, 0.2 m long, vibrating in the n = 4 harmonic, excites an open pipe, 0.89 m long, into second overtone resonance. The speed of sound in air is 345 m/s. The velocity of transverse waves in the string, in SI units, is closest to:
Force F = (3.0 N) + (-9.0 N) acts on a pebble with position vector r = (1.00 m) + (-1.6 m) , relative to the origin. What is the resulting torque acting on the pebble
4 kg of liquid seawater with initial temp 0 C and salinty 3 % is mixed with pure water with initital temp 15 C the system reaches equilibrium at 5 C
An open organ pipe has its fundamental frequency at 320 Hz. The first overtone of a closed organ pipe has the same frequency as the first overtone of the open pipe, How long (in meters) is the closed pipe
A 80.5 kg firefighter slides down a pole while a constant frictional force of 300 N retards her motion. Find the firefighter's speed just before she collides with the platform
a hydrogen atom in a state having a binding energy the energy required to remove an electron of 0.378 ev makes a
traumatic brain injury such as concussion results when the head undergoes a very large acceleration. generally an
An electromagnetic wave with a frequency of 4.60×10^14 Hz propagates with a speed of 2.14×10^8 m/s in a certain piece of glass. Find the wavelength of the wave in the glass
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