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An object of mass 2.98 kg, moving with an initial velocity of 4.97 m/s, collides with and sticks to an object of mass 2.54 kg with an initial velocity of -3.92 m/s. Find the final velocity of the composite object. vector velocity with i hat and j hat = (___ i + ____j) m/s
A bat flying in a cave emits a sound and receives its echo 0.37s later. How far away is the cave wall? (Hint: The sound has to travel to the wall and then back again. Use 340 m/s for the speed of sound.)
A pot with a steel bottom 7.95 mm thick rests on a hot stove. The area of the bottom of the pot is 0.170 m2. The water inside the pot is 100.0°C at and 0.490 kg are evaporated every 3.00 min.
what is the decrease in entropy of 25.0g of water that condenses on a bathroom mirror at 35C assuming no change in temp and given the latent heat of vap to be 2450KJ/KG
a certain second-order reaction has a rate constant of 1.10times10-3 at 27 and an initial half-life of 226. what is
Two cars are travelling on a desert road. After 5s, they are side by side at the next telephone pole. The distance between the poles is 70m.
q1. a 21-cm-long zero-resistance wire is pulled outward on zero-resistance rails at a steady speed of 1.0 in a 0.10
Three parallel wires are parallel to the y-axis, and all are at z=0. The first is glued to the table top at x=0 and carries a current of 3 amps in the positive y direction. What is the initial acceleration(magnitude and direction) of the second wir..
A helicopter is ascending vertically with a speed of 4.50 m/s. At a height of 195 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground.
A Galilean design telescope is to be made with an objective of focal length 450 mm with an angular magnification of 18. What should the focal length of the eyepiece be
The shaft of a pump starts from rest and has an angular acceleration of 3.00 rad/s2 for 15.0 s. What is the angle through which the shaft has turned
A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible, What is the person's mass
Now the gymnast (not holding any additional mass) walks directly above the right support. What is the force the left support exerts on the beam
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