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A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 46.0-gram mass is attached at the 21.0-cm mark, the fulcrum must be moved to the 39.2-cm mark for balance. What is the mass of the meter stick?
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A toy train rolls around a horizontal 1.70 diameter track. The coefficient of rolling friction is 0.10. What is the magnitude of the train's angular acceleration after it is released? (Found) How long does it take the train to stop if it's releas..
Green light (? = 546 nm) strikes a single slit at normal incidence. What width slit will produce a central maximum
how to Calculate the acceleration of the system. Assume the magnitude of the acceleration is the same during starting and stopping.
A rocket traveling at 0.540c sets out for the star, which is 5.45ly away from earth. It will return to earth immediately after reaching the star. According to the rocket crew how far will the rocket travel
Use Ampere's Law to find the magnetic field inside and outside a straight wire of radius Rcarrying current I uniformly distributed over it's circular cross-sectional area A.
At time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis, What is the velocity of the puck at time t = 1.50 s
A migrating bird is initially flying south at 10 m/s. To avoid hitting a high-rise building, the bird veers and changes its velocity to 3 m/s east over a period of 2 s. What is the bird's average acceleration (magnitude and direction) during this ..
The work completed by friction on the rock when it moves from point to point at the bottom of the bowl has magnitude 0.22. Just as the rock reaches point, what is the normal force on it because of the bottom of the bowl .
A beam of electrons passes by a single slit and a beam of protons passes by a second, but identical slit. If the electrons and protons have the similar speed, that beam would experience the greatest amount of diffraction? Clarify your answer.
A block of mass M is attached to a spring (spring constant k) which is attached to a wall. what is the amplitude of the resulting simple harmonic motion
A thin spherical copper shell of radius 9.5 cm carries an excess charge of -4.2 nC. How many excess electrons are on the outer surface of the shell
A 20.0cm -diameter cylinder of helium gas is 50.0cm long and at 30.0 ?C. The pressure gauge reads 130psi, How many helium atoms are in the cylinder
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