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A positively charged oil drop of mass is injected into a region of uniform electric field between two oppositely charged, horizontally oriented plates spaced 16 cm apart. If the mass of the drop is 7.0 10-15 kg and it remains stationary when the potential difference between the plates is 4.88 kV, what is the magnitude of the charge on the drop? (Ignore the small buoyant force on the drop.)
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The potential difference across a cell membrane from outside to inside is initially at -90 mV (when in its resting phase). How many ions move through the membrane
A converging lens of focal length 8.020 cm is 20.3 cm to the left of a diverging lens of focal length -6.47 cm. Find the magnification of the coin's final image
An AC voltage with an amplitude of 114 V is applied to a series combination of a 247 ?F capacitor, Calculate the power dissipated by the circuit at a frequency of 60.0 Hz
A spaceship moves past you at speed v. You measure the ship to be 287 m long, whereas an astronaut on the ship measures a length of 380 m. Find out v.
Suppose that you have two identical capacitors and a single resistor. If you make an RC circuit with one capacitor, What is the time constant for this circuit
A thin spherical shell of mass 0.25 kg and radius 0.15 m is released from rest from the top of a 3.0-m high ramp. What would the linear speed be at the bottom
Model the electromagnetic wave in a microwave oven as a plane traveling wave moving to the left, with an intensity of 26.3 kW/m2. An oven contains two cubical containers of small mass, each full of water.
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.64 m, Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point
A cube of ice is taken from the freezer at -8oC and placed in a 110 g aluminum calorimeter filled with 300 g of water at a temperature of 22oC. What was the mass of the ice cube
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 10 A, and that of the vacuum cleaner is 5.0 A, Determine the power consumed by the blow-dryer
A 6.40 nF capacitor is initially charged by a potential difference of 1.40×103 V. find the final electric potential energy stored in the capacitor
A column of soldiers, marching at 141 paces per minute, keep in step with the beat of a drummer at the head of the column, What is the approximate length of the column
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