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A two-stage rocket moves in space at a constant velocity of +4920 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1200-kg upper stage is +5980 m/s. What is the velocity (magnitude and direction) of the 2020-kg lower stage immediately after the explosion?
A battery is connected in series with a2.7 Ω resistor and a 15 mH inductor. The maximum current in the circuit is160 mA. Find the following the time constant of this circuit
A student sucks on the end of a long tube which is initially filled with air and whose other end is in a large bucket of water which is open to the atmosphere. They manage to draw the water up a vertical distance of 5.09 m
a typical cell membrane is 7.1 nm thick and has an electrical resistivity of 1.3 x 107 m. if the potential difference
A nuclear power plant operates at 70 % of its maximum theoretical (Carnot) efficiency between temperatures of 330oC and 600oC. calculate how much exhaust heat is discharged per hour
A 0.377 kg mass is attached to a spring and undergoes simple harmonic motion with a period of 0.57 s. The total energy of the system is 3 J
the clarinet is well modeled as a cylindrical pipe that is open at one end and closed at the other. find the wavelength
the focal point of a convex mirror is 4.0 m behind the mirror. a woman stands 2.0m in front of the mirror. what is the distance between the woman and her image
A 3.0 µC charge lies 10.0 cm to the right of a 2.0 µC on the axis. What is the magnitude of the force on the 2.0 uC charge
Find the force P necessary to push a 50.6 kg block down an incline of 32.4 degrees with an acceleration of 1.78 m/s^2. P is parallel to the incline and the coefficient of friction between the block and the incline surface is 0.805.
Calculate the temperature of the air inside the balloon which will produce the required lift. Assume the outside air is an ideal gas at 0°C. What factors limit the maximum altitude attainable by this method for a given load
Name two basic differences between normal and active galaxies. How do astronomers account for the differences in the spectra observed from active galaxies?
A 1900-kg car hits a parked 2200-kg car at 32 m/s and sticks to it. What is the velocity of the two cars after the collision
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