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Inside a sealed wooden box of mass M there hangs, by a thread of negligible mass, a lead pellet also of mass M. At some point, the thread breaks and the pellet falls freely the entire height of the box. What is the acceleration of the center of mass of the system of box and pellet, while the pellet is falling?
A sample of gas (? = 1.5) is taken through an adiabatic process in which the volume is compressed form 1600 cc to 400 cc. If the initial pressure is 150 KPa, what is the final pressure? How much work is completed on the gas in process.
An intern pushes a 72 kg patient on a 15 kg gurney, producing an acceleration of 0.60 m/s2. How much work does the intern do by pushing the patient and gurney through a distance of 2.5 m
A 30-g bullet initially traveling 500 m/s penetrates 12 cm into a wooden block. What average force does it exert on the block
In extremely cold weather conditions where the inside thermostat is set to 27 C and the outside temperature is -20 C, your 1200 square ft house might lose heat through the walls at a rate of 4000 W. How much energy might you lose in one week?
A windmill has an initial angular momentum of 8270 kg · m2/s. The wind picks up, and 5.81 s later the windmill's angular momentum is 9310 kg · m2/s
If the marble bounces straight upward to a height of 0.630 m, what is the magnitude and direction of the impulse delivered to the marble by the floor
A basketball player jumps straigh up to launch a long jump shot at an angle of 45 degrees with the horizontal and a speed of 15 m/s. How far from his original position does he land
An organ pipe is open at both ends. It is producing sound at its fifth harmonic, What is the length of the pipe
The charge experiences a magnetic force of 7.41 10-3 N. A second charge q2 = 4.00 µC travels at an angle of 40.0° with respect to the same magnetic field and experiences a 1.80 10-3-N force. Identify the magnitude of the magnetic field and the ..
How many 185 W lightbulbs can you use in a 191 V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbulb is 131 V.)
A 206 n sign hangs from the end of a 3.30 m long bar. find the two forces exerted by bolts A and B
What are the volume and linear charge densities.
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