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A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wound around the inner core. Spool is free to roll without slipping on a horizontal surface. If the string unwinds horizontally from the top of the core with a constant speed of 20.0 cm/s, Determine is the speed of the spools ground-touching point?
A block of mass m1 on a smooth, horizontal surface is connected to a ball of mass m2 by a lightweight cord over a lightweight , frictionless pulley , Determine the normal force exerted by the table on the block
A certain type of laser emits light that has a frequency of 5.2 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7 x 10-11 s. How many wavelengths are there in one pulse.
Electrons accelerated by a potential difference of 12.86 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength
a particle in the xy plane is attracted to the origin by a force f -kyr calculate the work done by the force as the
The index of refraction for a certain kind of glass is 1.648 for violet light and 1.619 for red light. find the difference between the angles of incidence of the two rays
A container is filled to a depth of 21.0 cm with water. What is the absolute pressure at the bottom of the container
A fly wheel turns through 30 rev(1 rev=2pie rad) as its slows from an angular speed of 6 rad/s to a stop. Assuming a constant angular acceleration, find the time for it to come to rest
the height of a cliff is 60m.you stand on it and throw a stone horizontally with a speed of 20m/s. how long does the stone strike the beach below the cliff
Two objects attract each other gravitationally with a force of 2.5 x10-10 N while they are 0.33 m apart. Their total mass is 4-kg. Find out their individual masses.
A football of mass0.420 kg is thrown 60 m by a quarterback who imparts to it an initial velocity at an angle of 45 degrees above the horizontal. what force does his hand exert on the ball
Two stars are at rest 1.0×1014m apart. This is about 10 times the diameter of the solar system. What is the speed of each star at the moment of impact
A 30 kg launching machine fires a 250 gram projectile horizontally at 100 m/s. What was the momentum of the machine
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