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A parallel-plate capacitor is designed so that the plates can be pulled apart. The capacitor is initially charged to a potential difference of 50 Volts when the plates are 1.0 mm apart. The plates are insulated so that the charge cannot leak off. What is the potential difference between the plates when they are pulled to a new separation 3.5 mm apart?
A 4.5 %u03BCF capacitor initially has a charge magnitude Q = 2.0 x 10-8 C. What is the total energy stored in the capacitor
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. calculate the rate of interstellar extinction in the direction of the star
A light beam having a wavelength of 470. nm in air is directed into glycerine (n = 1.47). What is the frequency of the light in the glycerine
a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the boom and the horizontal is 48°.
An 63 kg weight watcher wishes to climb a mountain to work o? the equivalent of a large piece of chocolate cake rated at 690 kcal (1 kcal = 1000 cal). How high must the person climb
Unpolarized light of intensity I0 is incident on three polarizing filters. The axis of the first is vertical, that of the second is 36° from vertical, What light intensity emerges from the third filter
An electromagnetic wave in vacuum has an electric field amplitude of 220 V/m. Calculate the amplitude of the corresponding magnetic field
Two point particles of charge Q1 = 46 µC and Q2 = 81 µC are found to have a potential energy of 43 J. What is the distance between the charges
A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 514 Hz and has a speed of 30.0 m/s. The motorcycle has a speed of 13 m/s. What frequency does the motorcyclist hear?
A crate is dragged 3m across a rough floor at a constant speed by a worker applying 500N at an angle of 30 deg above the horizontal. a) How many forces act on the crate? (identify them). b) How much work does each force produce?, c) What is the total..
A 25.0mH inductor is connected in series with a 50.0 ohms resistor, a 15.0 mH inductor and a 60.0 Hz 140.V rms source. Draw the reactance diagram for the circuit
A cylindrical flask is fitted with an airtight piston that is free to slide up and down, as shown in the figure below. A mass rests on top of the piston. The initial temperature of the system is 313 K and the pressure of the gas is held constant at 1..
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