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Two freight cars, each with a mass of 3.0 x 105 kg, collide. One was initially moving at 2.2 m/s; the other was at rest. They stick together. What is their final speed?
A solid sphere has a temperature of 768 K. The sphere is melteddown and recast into a cube that has the same emissivity and emitsthe same radiant power as the sphere. What is the cube'stemperature in kelvins?
Suppose a star the size of our Sun, but of mass 8.0times as great, were rotating at a speed of 1.0 revolution every11 days. what would its rotation speed be
An ice chest at a beach party contains 15 cans of soda at 5°C. Each can of soda has a mass of 0.36 kg and a specific heat capacity of 3600 J/(kg·°C). Someone adds a 6.2 kg watermelon at 28°C to the chest. The specific heat capacity of watermelon is n..
A uniform rod of mass 2.65×10?2kg and length 0.450m rotates in a horizontal plane about a fixed axis through its center, find the angular speed of the rod after the rings leave it
The inside temperature of a house is 65 degrees F. When the temperature outside is 35 degrees F, what is the fuel consumption of the furnace
a 5 kg block moving at 4.0 m/s collides and sticks with a second stationary block of mass 3.0 kg, find the velocity of blocks after the collision
Discuss the ways we can generate electricity. Discuss the dissimilarity between magnetic pole and electric fields. Give typical examples of electromagnetism in your daily life. What is the significance of electromagnetism in modern world? Discuss the..
A tuning fork is set into vibration above a vertical open tube filled with water, What is the frequency of the tuning fork
a parallel-plate air capacitor has a capacitance of 300 pf and a charge of magnitude 0.250uc on each plate. the plates
the note middle c on a piano has a frequency of 512 hz in the fundamental tone. suppose that the string that produces
the rope of a swing is 3.00 m long. calculate the angle from the vertical at which a 83.0 kg man must begin to swing in
The active element of a certain laser is an ordinary glass rod 19.5 cm long and 1.37 cm in diameter. Calculate its increase in volume
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