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A freight car with a mass of 2500 kg rolls down an inclinedtrack through a vertical distance of 1.5m. at the bottom of theincline, on a level track, the car collides and couples with anidentical freight car that was at rest. What percentage of the initial kinetic energy is lost in the collision?
two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. the orbital speeds
Two traveling sine waves, identical except for a phase difference of phi, What is the phase difference between the two waves
A circular plastic disk of radius R, carrying a surface charge density? = ks, is rotating at constant angular velocity, Find the magnetic moment of the rotating disk
A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from zero to 9.72 m/s in 3.84 s. find the average force experienced by the passenger
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly nine months, as measured by a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have a..
q1. why do cities directly east of the rockies such as denver colorado receive more precipitation than cities east of
What is the magnitude of the torque about the point where the beam is bolted into place.
An air mass has a temperature of 68F and 970hPa with a mixing ratio of 5 g/kg. Without any condensation or mixing the air mass now has a temperature of 50F and a pressure of 750hPa. Find the initial and final values of a) r, b) T(dew), and c) vapor p..
What direction is white dot on the sensor pointing
A certain atom has atomic number Z = 21 and atomic mass number A = 44. How many protons and neutrons are in the nucleus
A stainless-steel orthodontic wire is applied to a tooth that is out of line by 40 degrees. find the magnitude of the force on the tooth
You want to build a grandfather clock with a pendulum that has one second between its "tick" (swinging to) and its "tock" (swinging fro)
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