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A 4450-kg boxcar traveling at 12.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 4.00 m/s. What is the mass of the second car?
A frictionless spring of spring constant 500 N/m has one end attached to a vertical wall and the other end to a block of mass 3.0 kg, which is free to move in one dimension on a horizontal frictionless table. Find the amplitude and frequency of osc..
We all know that your homes have primary voltage Vp 120V that comes to them, What type of transformer is needed to reduce the voltage
Your professor enters the dogsled race during winter break. To getstarted, he pulls his sled, a mass 80 kg with a force of 180N at 20degrees to the horizontal. Find a) the work he does b) the final speed of the sled after it moves 30s
Residents of Hawaii are warned of the approach of a tsunami (tidal wave) by sirens mounted on the top of towers. Treating the siren as a point source of sound, and ignoring reflections and absorption, find the intensity level of one siren heard by a..
Light with a photon energy of 4.5 eV impinges on the surface of a material with work function 0.4 eV to eject electrons
A blimp used for aerial camera views of sporting events holds 200,000 ft3 of helium. How much does the helium weigh
What is the direction of the net magnetic field produced by these four wires at the center of the square?
a block with mass m = 2.00 kg slides without friction on a ramp inclinced at 53.1 degrees above horizontal. What is the lowest distance along the ramp that the block will reach
A luminous point is moving at speed Vo toward a spherical mirror of radius R along its axis. What is the speed at which the image is moving
An electrical cable consists of 184 strands of fine wire, each having 3.47 µ? resistance. What is the resistance of the cable
Explain the difference between a sampling space in general and the simple sampling space Gn IID in particular.
Two friends, Al and Jo, have a combined mass of 164kg. At the ice skating rink, they stand close together on skates, at rest and facing each other.
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