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Problem 1:
A thin glass rod of length 8.0cm that is uniformly charged to +8.0 nC and an equally long thin plastic rod uniformly charged to -8.0 nC are placed side by side, 4.0 cm apart (see figure). What are the electric field strengths E1 to E3 at distances 1.0 cm, 2.0 cm, and 3.0 cm from the glass rod along the line connecting the midpoints of the two rods?
Problem 2:
In an inkjet printer, letters and images are created by squirting drops of ink horizontally at a sheet of paper from a rapidly moving nozzle. The pattern on the paper is controlled by an electrostatic valve that determines at each nozzle position whether ink is squirted onto the paper or not.
Referring to the figure at right: The ink drops have a mass m each and leave the nozzle and travel horizontally toward the paper at velocity vx The drops pass through a charging unit that gives each drop a positive charge q by causing it to lose some electrons. The drops then pass between parallel deflecting plates of length D0, where there is a uniform vertical electric field with magnitude E.
If a drop is to be deflected a distance d by the time it reaches the end of the deflection plate, what magnitude of charge q must be given to the drop? Express q as simply as possible in terms of the symbols provided.
A 210 g piece of ice at 0°C is placed in 410 g of water at 22°C. The system is in a container of negligible heat capacity and is insulated from its surroundings. (a) What is the final equilibrium temperature of the system? (b) How much of the ice ..
A wheel of diameter 3.0 cm has a 4.0-m cord wrapped around it speriphery. Starting from rest, the wheel is given a constant angular acceleration of 2.0 rad/s2.The cord will unwind in: 0.82 s
The displacement of a particle in meters moving along x axis is given by x=18t+5t^2, calculate instantenaous velocity at t=2 seconds and instantaneous accelration
When 130 V is applied across a wire that is 7.5 m long, the magnitude of the current density is 16,486 A/m2. Find the resistivity of the wire in ohm-meters
A siren has a frequency of 750 Hz when it is at rest, whereas it has an apparent frequency of 800 Hz when it is moving toward a stationary observer
the sweep-second hand of a clock is 3.2 cm long. what are the magnitudes of a the magnitude of the average velocity
A steel rod with a length of l = 1.55 m and a cross section of A = 4.84 cm2 is held fixed at the end points of the rod. What is the size of the force developing inside the steel rod
The central star of a planetary nebula emits ultraviolet light with wavelength 104nm, What is the first-order diffraction angle
A 1.2 kg block is released from rest at point A and follows the curved guide as indicated. At point A this block is located 2.2 m higher than at point B. At what speed do the blocks move off to the right
Your friend has a near point of 114 cm, and she wears contact lenses that have a focal length of 35.2 cm. How close can she hold a magazine and still read it clearly
The flash of a digital camera totally consumes the energy of an arrray of identical 7 F capicitors when a picture is taken, How many capicitors are in the array
In one design, the large spring with spring constant 2.0×10^4 was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to the ship's frame.
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