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Consider a liquid drop of mass 83 mg falling with a terminal velocity of 5.9 m/s. Assuming a linear drag force R = bv, where v is the speed of the drop, what is the value of the constant b (in mg/s)?
You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, find the magnitude of the force that you exert on the handle
A motorcycle with a mass of 200 kg can accelerate from 0 to 30m/s in 3 seconds. Assuming all of the force generated with the engine goes into acceleration of the motorcycle , how much force is the engine producing? Show your work.
a 1000 mw fission reactor consume half of its fuel in 5 years. how much did it contain initially? assume that the
A supertrain of proper length 205 m travels at a speed of 0.87c as it passes through a tunnel having proper length 74 m. How much longer is the tunnel
question1a child in danger of drowning in a river is being downstream by a current that has a speed of 2.25 kmh. the
A rotating fan completes 1190 revolutions every minute. Consider the tip of a blade, at a radius of 17.0 cm. (a) During what distance does the tip move in one revolution? What are (b) the tip's speed and (c) the magnitude of its acceleration? (d) Wha..
A 109-kg horizontal platform is a uniform disk of radius 1.69 m and can rotate about the vertical axis through its center. A 61.5-kg person stands on the platform at a distance of 1.15 m from the center and a 27.5-kg dog sits on the platform near ..
An automobile can be considered to be mounted on four identicalsprings as far as vertical oscillations are concerned. The springsof a certain car are adjusted so that the oscillations have afrequency of 2.62 Hz.
A 11-V battery is connected to three capacitors in series. The capacitors have the following capacitances: 3.6 µF, 11.1 µF, and 32.5 µF. Find the voltage across the 32.5-µF capacitor
A 0.70 kg iron horseshoe is taken from a forge at 900°C and dropped into 3.00 kg of water at 13.0°C. find the total entropy change of the horseshoe-plus-water system
The magnetic field inside a superconducting solenoid is 5.80 T. The solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. Determine the magnetic energy density in the field
If the circular surface of the upper end of the rod is maintained at 290 K, what is the approximate boil-off rate of liquid helium after the lower half has reached 4.20 K
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