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A light-rail train going from one station to the next on a straight section of track accelerates from rest at 1.2 m/s2 for20 seconds. It then proceeds at constant speed for 1100 m beforeslowing down at 2.2 m/s2 until it stops at the station. What is the distance between the two stations?
A tsunami is generated by an earthquake off the coast of Alaska. It has a wavelength of 677 km. It travels at a distance of 3536 km in a period of 5.49 hr. What is the frequency of the wave in Hz?
A lens is formed from a plastic material that has an index of refraction of 1.55. If the radius of curvature of one surface is 1.25 m, calculate the focal length and the power of the lens.
two small plastic balls hang from the threads of negligible mass. each ball has a mass of 0.14 g and a charge of
Two thin coils of radius 3 cm are 20 cm apart and concentric with a common axis, What is the magnitude of the magnetic dipole moment of one of the coils of wire
A machine gun fires 25-g bullets at the rate of 4 bullets per second. What is the average recoil force experienced by the machine gun
Two stationary point charges of 4 nC and 2 nC are separated by a distance of 60 {rm cm}. An electron is released from rest at a point midway between the charges and moves along the line connecting them. What is the electric potential energy of the..
q1. on the wheel of fortune game show a solid wheel of radius 6.7 m and mass 10 kg is given an initial counter
As a rocket passes the earth at 0.75c, it fires a laser perpendicular to its direction of travel, What is the speed of the laser beam relative to the earth
a transverse wave is propagated in a string stretched along the x-axis. the equation of the wave in si units is given
Power windmills turn in response to the force of high-speed drag. For a sphere moving through a fluid, the resistive force, FR is pro- portional to r2v2, where r is the radius of the sphere and v is the fluid speed.
an object with a mass 2.70kg is executing simple harmonic motion, attached to a spring with spring constant k=280 N/m. What is the frequency of oscillation of the object
Space vehicles traveling through Earth's radiation beltscan intercept a significant number of electrons. Find the resulting surface charge density
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