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A particle P with mass 9kg has position vector r(r=2.5m) and velocity v(v=45.0 m/s). It is acted on by force F (F=10.0 N). All three vectors lie in the xy plane. About the origin, what is the z-component of the angular momentum of the particle?
In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut
Estimate the air pressure at the cloud base from the problem 1 assuming isothermal atmosphere with the average temperature between the cloud base and the surface
Recent measurements show that the black hole at the center of the Milky Way galaxy, which is believed to coincide with the powerful radio source Sagittarius A*, What is the maximum radius of this black hole
A 28.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block
How numerous years would it take a thermally insulated one-million-kilogram chuck of granite to undergo a 1000k boost in temperature?
A 2.00kg mass is pushed against a horizontal spring of force constant 28.0N/cm on a frictionless air table. find the greatest speed the mass reaches
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s.What is the frequency heard by the observer . What must be the result have been for the horizontal speed.
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 9.6 m and, in starting, rotates according to ? = 0.34t^2, find the magnitudes of the astronaut's angular velocity
How much work is done by the motor when the motor when the position of the arm is moved from x=0.150m to x=0.750m? what is the power of the motor in watts
A 100% efficient transformer has 120 primary turns and 840 secondary turns. Calculate the primary voltage and primary current
a laser beam is aimed at a 1.0 cm thick sheet of glass at an angle 30^{\circ} above the surface of the glass. What is the laser beam's direction of travel in the glass
A 54.00-cm guitar string under a tension of 55.000 N has a mass per unit length of 0.10000 g/cm. What is the highest resonant frequency
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