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A firecracker resting on a level street explodes into three pieces of equal mass. Immediately after the explosion, the first piece is moving north at 125 m/s, and the second piece is moving east at 75.0 m/sec. What is the velocity of the third piece immediately after the explosion?
The length of a certain wire is doubled and at the same time it's radius is reduced by a factor of 2
A 5.4 m-long rod of (constant diameter 4.6 mm) is made of 2.0 m of copper and the remainder of aluminum (see above). What is the heat flow rate through the composite rod
A rocket passes Earth and travels to a star, 80 light-years away. The earth hand the star are in the same frame of reference and the rocket moves at 0.9c with respect to the earth and the star. How many years does it take the rocket to reach this s..
A 85 cm^3 block of iron is removed from an 800 degree Celsius furnace and immediately dropped into 200 ml of 20 degree celsius water
A drinking straw 20 cm long and 3.0 mm in diameter stands vertically in a cup of juice 8.0 cm in diameter. What is the greatest height from which the child could drink
A mechanic jacks up the front of a car to an angle of 8.0 degrees with the horizontal in order to change the front tires. Calculate the magnitude of the torque excerted by the jack
A cylindrical lead rod with a diameter of 2.54 cm and a length of 76.2 cm is initially at a temperature of 20.0 C. After reaching equilibrium, what is the final temperature of the rod and the mercury
A stone is released from a tower in a vacuum. It takes 4.50s to reach the ground below. Find the height of the tower
The rotor in a centrifuge has an initial angular speed of 430 rad/s. After 4.1 s of constant angular acceleration, its angular speed has increased to 540 rad/s. What was the angle through which it turned
We can use 30kJ of work from a heavy-duty pushing robot that can apply different constant forces. Draw a free-body diagram for the freigh
In a Compton scattering experiment, an x-ray photon scatters through an angle of 18.0° from a free electron that is initially at rest. Calculate the angle through which the electron scatters
Two parallel plates, each with an area of 90.0cm^2 , are given equal and opposite charges of magnitude 0.200 uC. What is the dielectric constant
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