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A 9800 kg boxcar traveling at 19 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 13 m/s. What is the mass of the second car?
kg
A 100 mg pith ball hangs by a thread in the center of a parallel-plate capacitor. The capacitor plates are 5.0 cm x 5.0 cm, Draw a free-body-diagram of the pith ball
A train 450 m long is moving on a straight track with a speed of 82.1 km/h. determine how long the train blocked the crossing
assuming the acceleration is constant throughout each time interval (but not necessarily the same in both intervals), what distance does the shuttle travel during the interval from 7.00 s to 1.00 min.
Two skaters, one with mass 65 kg and the other with mass 80 kg, stand on an ice rink holding a pole of length 9 m and negligible mass. How far does the 80 kg skater move
A glass bead has a total charge of +10 nC. A proton is located at a distance of 3 cm from the center of the glass bead. What is the direction of the force on the proton
A carpenter uses a tape measure to measure the lenght of one side of a room. However , a large bookcase on one side of the room prevents him from measuring the full lenghth. Is this random or systematic error
If light is shown from a sheet of glass toward water and just skims the boundary between the glass, at what angle was the light aimed toward the water
The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 49-m-diameter loop-the-loop
A. The rate of hydrogen fusion (proton-proton chain) near 10^7 K increases with temperature as T^5. If you raise the temperature of the hydrogen-burning core by 10 percent, how much does the hydrogen fusion energy increase?
Planet Z is 1.00x10^4 km in diameter. The free fall acceleration on Planet Z is 5.00 m/s^2. What is the free fall acceleration
Find out the change in entropy of the system
In an ultra-low-temperature experiment, a collection of atoms enter a special state called a Bose-Einstein condensate, What is the speed of light in this condensate
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