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A stationary railroad whistle is sounded. An echo is heard 5.0 seconds later by the train's engineer. If the speed of sound is 343 m/s, how far away is the reflecting surface?
A 5-kg bowling ball (solid sphere, ) with a diameter of 22 cm is rolling without slipping on a smooth, level surface with a speed of 7.0 m/s. What is the ball's angular momentum
In an experiment performed in a space station, a force of 38 N causes an object to have an acceleration equal to 5 m/s2. What is the object's mass
What is the IMA of the jack.
a child rolls a 0.685kg basketball up a long ramp. the basketball can be considered a thin walled hollow sphere. find the maximum vertical height increase of the ball
A father racing his son has two-fifths the kinetic energy of the son, who has one-third the mass of the father. The father speeds up by 1.0 m/s, What is the original speed of the father
he rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV. Assume both particles have kinetic energies of 2000 MeV. Find the speed of the proton
question 1 in cylindrical coordinates ds2 drho2 p2dphi2 dz2. find the non-zero christoffel symbols and the equations
A 600g mass is traveling west (positive x-axis) at 8.0 m/s undergoes an inelastic collision with a stationary 250g mass. If the 600g mass travels at an angle of 40 (o) above the x-axis and with a speed of 3 m/s
A deuteron (the nucleus of an isotope of hydrogen) has a mass of 3.34×10?27kg and a charge of 1.60×10?19C, Find the speed of the deuteron
A football game begins with a kickoff in which the ball travels a horizontal distance of 45 yd and lands on the ground. what is the initial speed of the ball in this case
A light bulb has a resistance of 260 . It is connected to a standard wall socket (120 V rms, 60.0 Hz, Determine the rms current in the bulb
You are lowering two boxes, one on top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp. find the magnitude of the friction force on the upper box
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