Find acceleration of rising hot-air balloon if ratio given
What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.39? Neglect the mass of the balloon fabric and the basket.
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A rotating cylinder about 16 km long and 7.0 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth?
Find the wavelength of the ultrasonic wave emitted by a bat if it has a frequency of 4.0x 10^4 Hz.
A 361 kg mass is brought close to a second mass of 187 kg on a frictional surface with coefficient of friction 0.4. At what distance will the second mass be- gin to slide toward the first mass? The acceleration of gravity is 9.8 m/s2 and the value
Identify an describe four soil factord that are critical determinants of selecting drip irrigation versus flood irrigation.
Water flows through a horizontal tube of diameter 3.0 m that is joined to a second horizontal tube of diameter 2.2 . The pressure difference between the tubes is 8.0 kpa . Find the speed of flow in the first tube.
The plates each have an area of 2 × 10-3 m2, and the spacing between the plates is 6 × 10-3 m. There is no dielectric between the plates. What is the capacitance of the capacitor?
The ratio of the number of excess electronic charges to the number of molecules on the surface of the tape is the fraction of the molecules on the surface of the tape that have gained (or lost) an extra electronic charge e = 1.6e-19 C.
A spring (k =805N/m) is hanging from the ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at a = 0.47m/s2?
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