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A 54 kg person is parachuting and experiencing a downward acceleration of 2.0 m/s2. The mass of the parachute is 7.6 kg. (a) What is the upward force on the open parachute from the air? (b) What is the magnitude of the downward force on the parachute from the person?
How many wavelengths are there in one pulse
A car with a total mass of 1.57 103 kg has wheels of radius 32.5 cm and moment of inertia 0.875 kg · m2. Find the car's rotational energy when the car is moving at a speed of 21.0 m/s
A transformer with a turns ratio (secondary/primary) of 1:15 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit.
A simple 1.3m long pendulum oscillates at a location where g=9.81. How many complete oscillations does it make in 4.00min
A small coin is placed on a flat, horizontal turntable. The turntable is observed to make three revolutions in 3.14s. What is the speed of the coin when it rides withoutslipping at a distance of 5.0 cm from the center of theturntable
Small telescopes are often advertised as "200 power" or "magnifies 200 times." As someone knowledgeable about astronomical telescopes, how would you progress such advertisements.
Two moles of an ideal gas at 200 K occupies a 40 m3 container. What is the pressure of the gas
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.13 m2, what is the percentage lost by the window
A model of a red blood cell portrays the cell as a spherical capacitor a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t. Estimate the capacitance of the cell
The ac generator in a series RCL circuit has an rms voltage of 81.3 V. What is the rms current in the circuit
A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an internal resistance of 3.10M, What is the time constant of the circuit
A uniform metal rod, with a mass of2.9kg and a length of0.9m, is attached to a wall by a hinge at its base. Find the horizontal component of the force exerted on the rod by the hinge
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