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A railroad Diesel engine weighs 4 times as much as a freight car. If the Diesel engine coasts at a 5 km/h into a freight car that is at rest show that the speed of the coupled car is 4 km/h.
A 10-inch telescope is used to determine if what appears to be one star is actually two stars. Stars are so far away that they are essentially point sources. How close, in angle, can two stars be and still be resolved by this telescope? Use a wave..
Two wheels have the same mass and radius of 4.3 kg and 0.50 m, respectively. One has the shape of a hoop, Find the net external torque that acts on each wheel
A battery with an emf of 9.00 V has an internal resistance r. When connected to aresistor R, the terminal voltage is 8.80 V and the current is 0.11A. When a second identical battery is added in series and the externalresistor is R = 15 Ohms what i..
a 3.0 solid sphere radius 0.20 is released from rest at the top of a ramp and allowed to roll without slipping. the
A free electron and a free proton are exactly 0.70cm apart, Find the magnitude of the acceleration of the proton and Find the magnitude of the acceleration of the electron
A father clock is controlled by a swinging brass pendulum that is 1.1 meter long at a temperature of 23°C. Determine the change in the length of the pendulum rod
A torque of 12 N ? m is applied to a solid, uniform disk of radius 0.50 m. If the disk accelerates at 5.7 rad/s2, what is the mass of the disk
If gravitational forces alone prevent a spherical, rotating neutron star from disintegrating. Evaluate the minimum mean density of a star that has a rotation period of one millisecond
If the pressure of the 3 cm3 volume is reduced to 2.0 10-11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
A full moon happens every 29.5 days. Determine the frequency in hertz of the full moon
wo stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, At what time do the two cars collide
Sodium light (589.3 nm) from a narrow slit illuminates a Fresnel bi-prism made of glass of refraction index 1.5. What is the biprism angle
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